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https://api.github.com/repos/pandas-dev/pandas/issues/32416
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574,849,475
MDExOlB1bGxSZXF1ZXN0MzgzMTAwMTIx
32,416
`_ensure_type` should use `issubclass`
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2020-03-03T18:12:19Z
2020-03-13T17:37:26Z
2020-03-13T17:37:26Z
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Commit pandas-dev/pandas@6fd326d5a249967f9b6be60fc3c5f7366d914684 in pull request pandas-dev/pandas#30613 added `_ensure_type`, which utilizes `isinstance`. However, it is reasonable to assume that someone may want to create a DataFrame subclass. Therefore, `_ensure_type` should use `issubclass`. - [x] closes #31925 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry whatsnew entry isn't necessary?
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32,417
BLD: Clang error while installing snappy in requirements-dev.txt
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2020-03-03T18:57:07Z
2021-07-29T06:25:23Z
null
NONE
null
### Problem description I was going through the instructions in setting up the dev environment on Mac here: [Contributing to pandas](https://github.com/pandas-dev/pandas/blob/master/doc/source/development/contributing.rst#creating-a-python-environment-pip) And while I was trying to execute the below code: ``` # Install the build dependencies python -m pip install -r requirements-dev.txt ``` I got the below clang error (redacted): ``` Running setup.py install for python-snappy ... error ERROR: Command errored out with exit status 1: … clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -I/usr/local/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/sqlite/include -I/Users/xxx/virtualenvs/pandas-dev/include -I/usr/local/Cellar/python/3.7.6_1/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c snappy/snappymodule.cc -o build/temp.macosx-10.15-x86_64-3.7/snappy/snappymodule.o snappy/snappymodule.cc:31:10: fatal error: 'snappy-c.h' file not found #include <snappy-c.h> ^~~~~~~~~~~~ 1 error generated. error: command 'clang' failed with exit status 1 ---------------------------------------- ERROR: Command errored out with exit status 1: … ``` I went through the rest of the virtual environment set up fine besides this issue.
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574,901,801
MDExOlB1bGxSZXF1ZXN0MzgzMTQyMjgw
32,419
CLN: move away from .values, _ndarray_values
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1
2020-03-03T19:51:04Z
2020-03-04T15:08:21Z
2020-03-04T14:14:20Z
MEMBER
null
Also _values_from_object and _internal_get_values, though none of those made it into this PR.
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ENH: Categorical.fillna allow Categorical/ndarray
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2020-03-03T20:03:02Z
2020-03-14T16:52:48Z
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MEMBER
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- [ ] closes #xxxx - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry xref #32414. cc @TomAugspurger ATM the new test implemented in tests.arrays.categorical.test_missing is failing on the ndarray case for reasons that I dont fully grok. Are you familiar with this?
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574,916,373
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TYP: enforce annotation on SingleBlockManager.__init__
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2
2020-03-03T20:18:58Z
2020-03-11T14:07:31Z
2020-03-11T02:32:11Z
MEMBER
null
cc @simonjayhawkins my impression from yesterday's threads was that mypy should be catching the wrong-type being passed in `SingleBlockManager.__init__`, did I misunderstand something? Also (and I know ive asked before) is there a nice way to annotate the return type as "same type as self"? I tried `pandas._typing.T` but that didnt do it. Parts of this are repeated in several BlockManager methods, should probably be made into a helper function, pending discussion on above.
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574,953,244
MDExOlB1bGxSZXF1ZXN0MzgzMTg1NDky
32,422
CLN: avoid values_from_object in NDFrame
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1
2020-03-03T21:20:54Z
2020-04-05T17:45:35Z
2020-03-04T14:07:57Z
MEMBER
null
xref #32419
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574,975,743
MDU6SXNzdWU1NzQ5NzU3NDM=
32,423
BUG: df.apply disobeys raw=True
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3
2020-03-03T21:56:01Z
2020-03-16T10:08:28Z
2020-03-16T10:08:27Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python >>> df = pd.DataFrame(dict(ints=np.arange(3), ... floats=np.arange(3, dtype=float))) # df.apply callbacks with Series even though raw requested >>> df.apply(type, raw=True) ints <class 'pandas.core.series.Series'> floats <class 'pandas.core.series.Series'> dtype: object # Works for single dtype dfs >>> df.astype(int).apply(type, raw=True) ints <class 'numpy.ndarray'> floats <class 'numpy.ndarray'> dtype: object ``` #### Problem description When `df.apply(..., raw=True)`, the callback should _always_ be passed a numpy array (as documented) for reasons of performance and _convenience_ (arrays index much differently than Series). This is not a recent regression; 0.25.3 exhibits the same behavior. #### Expected Output ```py >>> df.apply(type, raw=True, axis=1) 0 <class 'numpy.ndarray'> 1 <class 'numpy.ndarray'> 2 <class 'numpy.ndarray'> dtype: object ``` #### Output of ``pd.show_versions()`` pandas 1.1.0.dev0+679.gd33b0025d pandas 1.0.1 pandas 0.25.3
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574,993,289
MDExOlB1bGxSZXF1ZXN0MzgzMjIwMTQ3
32,424
Fix BUG: overflow on pd.Timedelta(nanoseconds=) constructor
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2020-03-03T22:24:14Z
2020-03-04T15:43:52Z
2020-03-04T14:22:36Z
CONTRIBUTOR
null
Add regression test - [x] closes #32402 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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32,425
BUG: Fix DataFrame.apply(..., raw=True) not calling with raw array
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2020-03-03T23:37:50Z
2020-03-16T09:25:35Z
2020-03-14T20:21:12Z
CONTRIBUTOR
null
- [x] closes https://github.com/pandas-dev/pandas/issues/32423 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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CLN: avoid values_from_object in Series
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3
2020-03-04T00:59:24Z
2020-04-24T14:59:13Z
2020-03-11T02:29:35Z
MEMBER
null
xref #32422, #32419
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575,126,709
MDExOlB1bGxSZXF1ZXN0MzgzMzMwNzY3
32,427
CLN: avoid _internal_get_values in groupby.generic
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3
2020-03-04T04:19:38Z
2020-03-05T15:00:17Z
2020-03-05T10:49:42Z
MEMBER
null
xref #27165, #27167
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575,226,008
MDExOlB1bGxSZXF1ZXN0MzgzNDEwNzM0
32,428
WIP: ENH: Add engine keyword argument to groupby.apply to leverage Numba
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2
2020-03-04T08:39:03Z
2020-04-21T16:30:48Z
2020-03-14T04:05:03Z
MEMBER
null
- [x] closes #31845 - [ ] tests added / passed - [x] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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575,260,369
MDExOlB1bGxSZXF1ZXN0MzgzNDM4NTA3
32,429
DOC: Fix EX02 in pandas.Index.get_loc
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3
2020-03-04T09:39:27Z
2020-03-04T16:22:17Z
2020-03-04T16:22:05Z
CONTRIBUTOR
null
- [ ] closes #xxxx - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Related to #27977. ``` ################################################################################ ################################## Validation ################################## ################################################################################ 5 Errors found: No extended summary found Parameter "key" has no description The first line of the Returns section should contain only the type, unless multiple values are being returned Return value has no description See Also section not found ```
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575,260,424
MDU6SXNzdWU1NzUyNjA0MjQ=
32,430
ENH: support nullable dtypes in get_dummies
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1
2020-03-04T09:39:33Z
2020-03-10T14:14:56Z
null
NONE
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd series = pd.Series(list('AA')) col = pd.get_dummies(series, dtype='UInt8').A assert col.dtype.name == 'UInt8' # Actual: np.uint8 ``` #### Problem description In `get_dummies`, dtype strings of "Int64", etc., are ignored in favor of their non-nullable Numpy equivalents. There's a few other places that *could* cause this bug, but I haven't checked public API: - `.core.reshape.reshape._Unstacker.get_new_values` - `.core.dtypes.cast.maybe_downcast_to_dtype` - `.core.dtypes.cast.maybe_downcast_numeric` #### Expected Output The dtype of such a call should be the Nullable type. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.7.6.final.0 python-bits : 64 OS : Darwin OS-release : 18.7.0 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 19.2.3 setuptools : 41.2.0 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.11.1 IPython : 7.13.0 pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : None matplotlib : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pytest : None pyxlsb : None s3fs : None scipy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : None </details>
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32,431
TypeError: cannot do label indexing on <class 'pandas.core.indexes.base.Index'> with these indexers [nan] of <class 'float'>
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8
2020-03-04T10:11:51Z
2020-11-18T13:53:17Z
2020-11-18T13:53:17Z
NONE
null
```py import pandas as pd import numpy as np df = pd.Series([1, '{1,2}', 1, None]) vc = df.value_counts(dropna=False) print(vc.loc[np.nan]) print(vc[np.nan]) ``` ``` TypeError: cannot do label indexing on <class 'pandas.core.indexes.base.Index'> with these indexers [nan] of <class 'float'> ``` Hello, now I have trouble getting null value count, help.
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32,432
BUG: pandas.DataFrame.any bool_only parameter not working since v0.24.0
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3
2020-03-04T12:35:02Z
2020-09-11T01:11:44Z
2020-09-11T01:11:44Z
NONE
null
#### Code Sample, a copy-pastable example if possible This is the code that I run to test the DataFrame.any function in different pandas versions ```python import pandas as pd pd.__version__ df = pd.DataFrame({"A": [True, False], "B": [1, 2]}) df df.dtypes df.any(axis=1) df.any(axis=1, bool_only=True) ``` #### Problem description In pandas version 0.23.4, the output is expected when `` bool_only=True`` is specified ```python >>> import pandas as pd >>> pd.__version__ '0.23.4' >>> df = pd.DataFrame({"A": [True, False], "B": [1, 2]}) >>> df A B 0 True 1 1 False 2 >>> df.dtypes A bool B int64 >>> df.any(axis=1) 0 True 1 True dtype: bool >>> df.any(axis=1, bool_only=True) 0 True 1 False dtype: bool ``` However in pandas version 0.24.0, the final output is wrong for ``bool_only=True`` ```python >>> import pandas as pd >>> pd.__version__ '0.24.0' >>> df = pd.DataFrame({"A": [True, False], "B": [1, 2]}) >>> df A B 0 True 1 1 False 2 >>> df.dtypes A bool B int64 >>> df.any(axis=1) 0 True 1 True dtype: bool >>> df.any(axis=1, bool_only=True) 0 True 1 True dtype: bool ``` #### Expected Output ```python >>> df.any(axis=1, bool_only=True) 0 True 1 False dtype: bool ``` #### Output of ``pd.show_versions()`` I can only reproduce this bug for pandas version v0.24.0 and above so I'll include details for v0.24.0. <details> INSTALLED VERSIONS ------------------ commit: None python: 3.7.4.final.0 python-bits: 64 OS: Darwin OS-release: 18.7.0 machine: x86_64 processor: i386 byteorder: little LC_ALL: None LANG: en_GB.UTF-8 LOCALE: en_GB.UTF-8 pandas: 0.24.0 pytest: 5.0.1 pip: 20.0.2 setuptools: 40.8.0 Cython: None numpy: 1.17.0 scipy: None pyarrow: 0.14.1 xarray: None IPython: None sphinx: None patsy: None dateutil: 2.8.0 pytz: 2019.2 blosc: None bottleneck: None tables: None numexpr: None feather: None matplotlib: None openpyxl: None xlrd: None xlwt: None xlsxwriter: None lxml.etree: None bs4: None html5lib: None sqlalchemy: None pymysql: None psycopg2: None jinja2: None s3fs: None fastparquet: None pandas_gbq: None pandas_datareader: None gcsfs: None </details>
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32,433
Memory leaks if an object is saved in a DataFrame and references the DataFrame
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2020-03-04T14:05:16Z
2021-07-29T06:27:32Z
null
NONE
null
#### Code Sample, a copy-pastable example if possible ```python # Your code here class MemoryLeakDemoDF: """ Dummy class to demonstrate memory leaks """ def __init__(self, df): self.df = df # if "self" is saved in a DataFrame, it causes a memory leak df.loc[0, 'object'] = self num = 3 for _ in range(num): df = pd.DataFrame() MemoryLeakDemoDF(df) ``` #### Problem description In the example above, the objects of MemoryLeakDemoDF are floating in memory and not removed by garbage collector. A similar example with a dict instead of a DataFrame does not lead to this problem. This behavior can cause massive memory leaks in a program that uses DataFrames that have references to other objects. #### Expected Output It is expected that there are no memory leaks in a code example above. What is the reason for the memory leak in this case? What is the root cause of the garbage collector not being able to remove the objects from memory? #### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] INSTALLED VERSIONS ------------------ commit : None python : 3.7.3.final.0 python-bits : 64 OS : Windows OS-release : 10 machine : AMD64 processor : Intel64 Family 6 Model 60 Stepping 3, GenuineIntel byteorder : little LC_ALL : None LANG : None LOCALE : None.None pandas : 0.25.3 numpy : 1.17.3 pytz : 2019.3 dateutil : 2.8.1 pip : 19.3.1 setuptools : 42.0.2.post20191201 Cython : 0.29.14 pytest : 5.3.2 hypothesis : None sphinx : 2.3.0 blosc : None feather : None xlsxwriter : 1.2.6 lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : 7.10.2 pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : None matplotlib : 3.1.2 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None s3fs : None scipy : 1.3.2 sqlalchemy : None tables : None xarray : None xlrd : 1.2.0 xlwt : None xlsxwriter : 1.2.6 </details>
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MDU6SXNzdWU1NzU1MTI0OTY=
32,434
Rounding issue when using pd.read_excel() followed by pd.to_sql()
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2020-03-04T15:39:10Z
2020-10-21T01:43:03Z
2020-10-21T01:43:03Z
NONE
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#### Code Sample, a copy-pastable example if possible Single column Excel(.xls) file with the following data: Document Summary All Total Sales 1479.9 39002.33 11295.76 ```python import pandas as pd import sqlalchemy db_user = "user" db_pass = "pass" server = "server_name" db = "database" sql_engine = sqlalchemy.create_engine( f"mssql+pyodbc://{db_user}:{db_pass}@{server}/{db}" "?driver=ODBC+Driver+17+for+SQL+Server" ) # single column Excel file containing mixed string and float data types file_path = ( r"doc_summary.xls" ) df = pd.read_excel(io=file_path, sheet_name=0, header=None) # check our values once loaded into pandas dataframe print(df[0].values) # prints ['Document Summary' 'All' 'Total Sales' 1479.9 39002.32999999997 11295.76000000001] table_name = "stopRounding" # load dataframe into sql table df.to_sql(table_name, sql_engine, if_exists="replace") # !! this is where floating point values above are being rounded # retrieve data from table created from dataframe sql_val = pd.read_sql(f"SELECT * FROM {table_name}", sql_engine) print(sql_val.values) # prints [[0 'Document Summary'] # [1 'All'] # [2 'Total Sales'] # [3 '1479.9'] # [4 '39002.3'] # [5 '11295.8']] ``` #### Problem description When using pandas.read_excel() to load the data into a dataframe followed by pandas.to_sql(), the float precision is being rounded up to the nearest tenth decimal place. I read over the pandas documentation and do not see any arguments that can be passed to maintain the float precision. I've also tried the same thing with pandas.read_csv() followed by pandas.to_sql() using the same data, and the float precision is maintained! So the issue seems to be with read_excel() only. #### Expected Output Document Summary All Total Sales 1479.9 39002.33 11295.76 #### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.0 pip : 20.0.2 setuptools : 41.2.0 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : 1.2.8 lxml.etree : 4.4.1 html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : None pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : 4.4.1 matplotlib : None numexpr : None odfpy : None openpyxl : 3.0.3 pandas_gbq : None pyarrow : None pytables : None pytest : None pyxlsb : None s3fs : None scipy : None sqlalchemy : 1.3.13 tables : None tabulate : None xarray : None xlrd : 1.2.0 xlwt : None xlsxwriter : 1.2.8 numba : None </details>
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IntegerArray.astype("datetime64[ns]") fails with NAs
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2020-03-04T15:39:43Z
2020-03-14T03:37:22Z
2020-03-14T03:37:22Z
MEMBER
null
tools.datetimes has to dig into IntegerArray internals in a way that in principle should be handled by IntegerArray.astype ``` ser = pd.Series(range(2), dtype="Int64") arr = ser.array >>> arr.astype("datetime64[ns]") array(['1970-01-01T00:00:00.000000000', '1970-01-01T00:00:00.000000001'], dtype='datetime64[ns]') arr[-1] = pd.NA >>> arr.astype("datetime64[ns]") ValueError: cannot convert to 'datetime64[ns]'-dtype NumPy array with missing values. Specify an appropriate 'na_value' for this dtype. ```
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32,436
DOC: correct issue number for PR #32424
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0
2020-03-04T16:37:55Z
2020-03-05T11:26:32Z
2020-03-05T11:23:34Z
MEMBER
null
xref #32424
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575,573,456
MDU6SXNzdWU1NzU1NzM0NTY=
32,437
Include tests for pd.NA and pd.NaT in tests/base/test_ops.py
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2020-03-04T16:56:15Z
2020-05-22T03:41:26Z
null
CONTRIBUTOR
null
This is a follow-up from #32281, specifically on [this comment](https://github.com/pandas-dev/pandas/pull/32281/files#r387677448) from jreback. `test_unique_null`, `test_nunique_null` and `test_value_counts_null` should be tested for `pd.NA` and `pd.NaT` as well, ideally using the `nulls_fixture` from `pandas/conftest.py`. As discovered/discussed in the mentioned PR, they would xfail for now. It's something that should be tested and ideally fixed though.
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32,438
CI: mypy fixup for #32261
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2020-03-05T10:13:15Z
2020-03-04T22:24:39Z
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https://github.com/pandas-dev/pandas/runs/485121000
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32,439
DOC: Fix capitalization of the word pandas in the docs
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2020-03-04T17:09:20Z
2020-03-12T04:49:31Z
2020-03-12T04:49:24Z
CONTRIBUTOR
null
- [x] closes #32316 - [x] tests added / passed - [x] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry As stated in the referred issue, _pandas_ reference in the docs should be standardised to pandas, not *pandas* or Pandas. I've only changed the references in `doc/source/development/*.rst` for now, to see if the changes are okay or not
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CI Failing: Linux py37_locale TestTSPlot.test_matplotlib_scatter_datetime64
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`DataFrame.diff` on `datetime64` returns result inconsistent with `Series.diff`
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2020-03-04T17:27:15Z
2020-10-10T17:40:57Z
2020-10-10T17:40:56Z
CONTRIBUTOR
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#### Code Sample, a copy-pastable example if possible ```python >>> pd.Series(['NaT', '2019-01-01', '2019-01-02'], dtype='datetime64[ns]').diff() 0 NaT 1 NaT 2 1 days dtype: timedelta64[ns] >>> pd.Series(['NaT', '2019-01-01', '2019-01-02'], dtype='datetime64[ns]').to_frame().diff() 0 0 NaT 1 -88855 days +00:12:43.145224 2 1 days 00:00:00 ``` #### Problem description Doing `.diff()` on a `DataFrame` of `datetime64` should yield exactly time deltas in exactly the same way as on the `Series` i.e. index `(1,0)` in the `DataFrame` above should be `NaT`, not an overflown timedelta64. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.8.1.final.0 python-bits : 64 OS : Windows OS-release : 10 machine : AMD64 processor : Intel64 Family 6 Model 63 Stepping 2, GenuineIntel byteorder : little LC_ALL : None LANG : None LOCALE : English_United Kingdom.936 pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 45.2.0.post20200210 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : None IPython : None pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : None matplotlib : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pytest : None pyxlsb : None s3fs : None scipy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : None </details>
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CI: fix test_matplotlib_scatter_datetime64
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2020-03-04T17:29:27Z
2020-03-04T19:14:42Z
2020-03-04T19:11:38Z
MEMBER
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- [ ] closes #32440 - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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incosistencies in dataframe.dtype.isin() - I am getting inconsistent with different runs on same code.
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2020-12-16T02:59:10Z
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#### Code Sample, a copy-pastable example if possible ``` import numpy as np import pandas data = [[2, 'tom', 10], [3, 'nick', 15], [4, 'juli', 14]] myDf = pandas.DataFrame(data, columns=['a','b','c']) print (myDf.dtypes) print((myDf.dtypes.isin(['int64']))) ``` #### Problem description Problem is that I am getting inconsistent results based on running the same code: So first run gives me: ``` a False b False c False ``` and second (sometimes it takes up to 10 attempts) run gives me: ``` a True b False c True ``` the second case is the truth and matches the myDf.dtypes: ``` a int64 b object c int64 ``` . Again to reiterate, I am not changing the code but when I keep running the same code I sometime get the first output and sometime get the second output. This is while I do not change the input, code or interpreter. I tried it on different machines and interpreters and still getting the same inconsistent result the version of Python 3.7 the version of Pandas: 1.0 #### Expected Output Consistent result (as it sometimes matches with the current output). #### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] INSTALLED VERSIONS ------------------ commit : None python : 3.7.4.final.0 python-bits : 64 OS : Darwin OS-release : 19.3.0 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : None LOCALE : en_US.UTF-8 pandas : 1.0.0 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 19.0.3 setuptools : 40.8.0 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : None IPython : None pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : None matplotlib : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pytest : None pyxlsb : None s3fs : None scipy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : None </details>
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CI: ax.rowNum and ax.colNum attributes deprecated in Matplotlib 3.2
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32,445
Backport PR #32442 on branch 1.0.x (CI: fix test_matplotlib_scatter_datetime64)
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1
2020-03-04T19:12:19Z
2020-03-04T20:03:13Z
2020-03-04T20:03:13Z
NONE
null
Backport PR #32442: CI: fix test_matplotlib_scatter_datetime64
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32,446
BLD: Remove snappy from requirements-dev.txt
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2020-03-04T19:35:36Z
2020-03-04T21:31:59Z
2020-03-04T21:31:58Z
NONE
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#### Problem description As raised in issues #32417 and #32327, `snappy` is causing issues while setting up a dev environment `requirements-dev.txt`. #### Proposed change I suggest removing `snappy` from `requirements-dev.txt` to allow fewer issues when setting up the environment. #### Acknowledgements @WillAyd for suggesting to raise this issue. Related Issues: #32417, #32327
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32,447
how to keep nanosecond timestamps?
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1
2020-03-04T20:02:28Z
2020-04-19T01:49:29Z
2020-04-19T01:49:28Z
NONE
null
Hello there, I apologize if this a very simple question but what is the best way to store nanoseconds timestamps with `pandas` and `pyarrow`? Right now it seems that using the `flavor = 'spark'` keeps the nanosecond precision while the other flavors do not. Is that the right way to see things? Consider this: ``` import pyarrow as pa import pandas as pd import numpy as np pa.__version__ pa.__version__ Out[131]: '0.13.0' pd.__version__ pd.__version__ Out[128]: '0.24.2' mydf = pd.DataFrame({'mytime' : [pd.to_datetime('2020-01-01 10:10:10.123456'), pd.to_datetime('2020-01-01 10:10:10.234567')], 'value' : [1,2]}) mydf.to_parquet('testfile_spark.pq', engine = 'pyarrow', flavor = 'spark') mydf.to_parquet('testfile_regular.pq', engine = 'pyarrow', allow_truncated_timestamps = True) one = pd.read_parquet('testfile_spark.pq') one.head() Out[134]: mytime value 0 2020-01-01 10:10:10.123456 1 1 2020-01-01 10:10:10.234567 2 two = pd.read_parquet('testfile_regular.pq') two.head() Out[136]: mytime value 0 2020-01-01 10:10:10.123 1 1 2020-01-01 10:10:10.234 2 ``` EDIT @wesm asked me to post here from https://github.com/apache/arrow/issues/6536
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32,448
Series.convert_dtypes is not idempotent with small strings
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2020-03-04T20:02:59Z
2020-03-06T07:17:19Z
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#### Code Sample, a copy-pastable example if possible ```python s = pd.Series(['x', 'y', 'z']) print(s.dtype, s.convert_dtypes().dtype, s.convert_dtypes().convert_dtypes().dtype, sep='\n') ``` Output: ``` object string |S1 ``` #### Problem description It is reasonably expected that the output of `convert_dtypes` will always be stable such that if it's applied multiple times to the same Series, the subsequent calls after the first one will be redundant and will result in no change. This reasonable assumption doesn't however hold; it's violated in different ways by the current implementation. In the pasted example, it converts `object` to `string` and then to `|S1` which is a clear violation of stability. In other cases I've seen it convert `object` to `string` and then back to `object`, with this making no sense. Also, the word "best" should be removed from the documentation. In what formal way exactly is its output the best? In some cases I've seen this method change the dtype to dramatically increase the deep memory usage of a Series. Given the seemingly whimsical implementation, the term seems to carry no meaning. I think this entire method, as it stands, is a hack job, and has no place in the package. #### Expected Output ``` object |S1 |S1 ``` #### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] /usr/local/lib/python3.6/dist-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>. """) /usr/local/lib/python3.6/dist-packages/pandas_datareader/compat/__init__.py:18: FutureWarning: pandas.util.testing is deprecated. Use the functions in the public API at pandas.testing instead. from pandas.util.testing import assert_frame_equal INSTALLED VERSIONS ------------------ commit : None python : 3.6.9.final.0 python-bits : 64 OS : Linux OS-release : 4.14.137+ machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.0.1 numpy : 1.17.5 pytz : 2018.9 dateutil : 2.6.1 pip : 19.3.1 setuptools : 45.1.0 Cython : 0.29.15 pytest : 3.6.4 hypothesis : None sphinx : 1.8.5 blosc : None feather : 0.4.0 xlsxwriter : None lxml.etree : 4.2.6 html5lib : 1.0.1 pymysql : None psycopg2 : 2.7.6.1 (dt dec pq3 ext lo64) jinja2 : 2.11.1 IPython : 5.5.0 pandas_datareader: None bs4 : 4.6.3 bottleneck : 1.3.1 fastparquet : None gcsfs : None lxml.etree : 4.2.6 matplotlib : 3.1.3 numexpr : 2.7.1 odfpy : None openpyxl : 2.5.9 pandas_gbq : 0.11.0 pyarrow : 0.14.1 pytables : None pytest : 3.6.4 pyxlsb : None s3fs : 0.4.0 scipy : 1.4.1 sqlalchemy : 1.3.13 tables : 3.4.4 tabulate : 0.8.6 xarray : 0.14.1 xlrd : 1.1.0 xlwt : 1.3.0 xlsxwriter : None numba : 0.47.0 </details>
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CI: Fix flaky test_value_counts_null
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5
2020-03-04T21:21:24Z
2020-03-09T19:32:12Z
2020-03-07T09:40:10Z
CONTRIBUTOR
null
As mentioned by @simonjayhawkins in #32438 Trace of the failing test: https://dev.azure.com/pandas-dev/pandas/_build/results?buildId=29965&view=logs&j=077026cf-93c0-54aa-45e0-9996ba75f6f7&t=e95cf409-86ae-5b4d-6c5f-79395ef75e8f
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32,450
Converting a StringDtype series to an Inte64Dtype not working as expected
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3
2020-03-04T22:01:12Z
2020-03-27T14:59:58Z
2020-03-27T14:59:58Z
NONE
null
I am interested in converting a StringDtype series to an Inte64Dtype. The following code produces a TypeError: ``` x = pd.Series(['1', pd.NA, '3'], dtype=pd.StringDtype()) x.astype('Int64') ... TypeError: data type not understood ``` If I rewrite it as follows, I get a different TypeError: ``` x = pd.Series(['1', pd.NA, '3'], dtype=pd.StringDtype()) x.astype(int) ... TypeError: int() argument must be a string, a bytes-like object or a number, not 'NAType ``` The only way I have been able to convert from StringDtype is: ``` x = pd.Series(['1', pd.NA, '3'], dtype=pd.StringDtype()) pd.to_numeric(x, errors='coerce').convert_dtypes() ... 0 1 1 <NA> 2 3 dtype: Int64 ``` This works fine, but is inelegant. I would have expect astype to be able to do the conversion directly. Is there a recommended way to convert between these types?
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32,451
TST/VIZ: add test for legend colors for DataFrame with duplicate column labels #11136
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3
2020-03-04T23:16:33Z
2020-03-12T04:52:36Z
2020-03-12T04:52:30Z
CONTRIBUTOR
null
- [X] closes #11136 - [X] tests added / passed - [X] passes `black pandas` - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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CLN: avoid _ndarray_values, values in MultiIndex
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1
2020-03-05T00:36:55Z
2020-04-05T17:45:35Z
2020-03-08T15:40:35Z
MEMBER
null
There are a couple of places in MultiIndex left after this that are a little trickier, will do in a separate pass.
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32,453
Nullable integer data type bug in read_csv
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1
2020-03-05T07:45:30Z
2020-03-10T14:07:50Z
2020-03-10T14:07:40Z
NONE
null
When reading csv file column with NA fields loose precision. I think the reason of the problem is the cast to float somewhere under hood. `/tmp/1.csv:` ```csv field1,field2 ,1577134800018164904 1577134800018226901,1577134800018267738 ``` ```python A = pd.read_csv('/tmp/1.csv', dtype='Int64') A ```   | field1 | field2 -- | -- | -- 0| <NA> | 1577134800018164904 1| **1577134800018226944** | 1577134800018267738 ```python int(float(1577134800018226901)) 1577134800018226944 ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.6.1.final.0 python-bits : 64 OS : Linux OS-release : 3.16.0-77-generic machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 28.8.0 Cython : 0.29.14 pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : 7.12.0 pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : None matplotlib : 3.1.3 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pytest : None pyxlsb : None s3fs : None scipy : 1.4.1 sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : 0.48.0 </details>
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32,454
DEPS: Removing snappy from local/docs dependencies
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2020-03-05T07:54:10Z
2020-03-09T20:47:23Z
2020-03-09T20:47:22Z
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null
- [X] xref #32417 The docs build should fail if snappy is required to build the docs, and should point out where it's being used. If it's not failed, I think this can be merged and we can remove snappy from the local and docs dependencies.
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32,455
VIZ: Fixing Matplotlib depecation warnings for ax.rowNum and ax.colNum
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2020-03-05T08:20:17Z
2020-03-05T08:37:01Z
2020-03-05T08:37:01Z
MEMBER
null
- [X] xref #32444 Fixing the deprecation warning in the docs (testing if we really need to be compatible with the old syntax)
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32,456
Backport PR #32444 on branch 1.0.x (CI: ax.rowNum and ax.colNum attributes deprecated in Matplotlib 3.2)
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0
2020-03-05T10:11:04Z
2020-03-05T10:45:00Z
2020-03-05T10:45:00Z
NONE
null
Backport PR #32444: CI: ax.rowNum and ax.colNum attributes deprecated in Matplotlib 3.2
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32,457
commit history attributes commit to committer instead of author
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2020-03-05T10:51:17Z
2020-03-06T12:29:24Z
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https://github.com/pandas-dev/pandas/commits/master since 690e382d2e93198c3629943607cef9fc3012dfd4
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32,458
CLN: Removed unused variable
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2020-03-05T11:20:26Z
2020-03-14T14:07:03Z
2020-03-06T16:54:37Z
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I can't see the reason for ```res_view``` to exist, the CI should tell me if I am wrong. Also this is removing one warning when compiling ```pandas/_libs/internals.pyx``` This is the warning that is removing: ``` pandas/_libs/internals.c:8952:36: warning: ‘__pyx_t_23’ may be used uninitialized in this function [-Wmaybe-uninitialized] 8952 | __pyx_cur_scope->__pyx_t_9 = __pyx_t_23; ```
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32,459
CLN: Using clearer imports
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2020-03-05T11:39:44Z
2020-03-24T13:58:11Z
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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Disallow .__call__() as workaround for non-named functions
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5
2020-03-05T12:07:04Z
2020-05-13T15:53:48Z
2020-05-13T15:53:45Z
CONTRIBUTOR
null
Currently this script: ```python import pandas as pd funcs = [lambda: 1] pd.eval("funcs[0]()") ``` Fails with: TypeError: Only named functions are supported however this can easily be worked around by adding `.__call__`: ```python pd.eval("funcs[0].__call__()") ``` I'm assuming we don't want to allow this workaround. This PR ensures that it will fail with the same error.
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32,461
DataFrame output too wide / not truncated properly
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2020-03-05T12:29:15Z
2020-05-16T21:15:30Z
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#### Problem description It seems to me, that DataFrames are not always correctly trunctaed to fit the terminal width (using pandas 1.0.1). My pandas config is set such, that it auto detects terminal width and the representation of the DataFrame should fit in. <details> <summary>Relevant pandas config settings</summary> <p> ```python display.width : int Width of the display in characters. In case python/IPython is running in a terminal this can be set to None and pandas will correctly auto-detect the width. Note that the IPython notebook, IPython qtconsole, or IDLE do not run in a terminal and hence it is not possible to correctly detect the width. [default: 80] [currently: 80] display.max_columns : int If max_cols is exceeded, switch to truncate view. Depending on `large_repr`, objects are either centrally truncated or printed as a summary view. 'None' value means unlimited. In case python/IPython is running in a terminal and `large_repr` equals 'truncate' this can be set to 0 and pandas will auto-detect the width of the terminal and print a truncated object which fits the screen width. The IPython notebook, IPython qtconsole, or IDLE do not run in a terminal and hence it is not possible to do correct auto-detection. [default: 0] [currently: 0] display.max_colwidth : int or None The maximum width in characters of a column in the repr of a pandas data structure. When the column overflows, a "..." placeholder is embedded in the output. A 'None' value means unlimited. [default: 50] [currently: 50] display.expand_frame_repr : boolean Whether to print out the full DataFrame repr for wide DataFrames across multiple lines, `max_columns` is still respected, but the output will wrap-around across multiple "pages" if its width exceeds `display.width`. [default: True] [currently: True] display.large_repr : 'truncate'/'info' For DataFrames exceeding max_rows/max_cols, the repr (and HTML repr) can show a truncated table (the default from 0.13), or switch to the view from df.info() (the behaviour in earlier versions of pandas). [default: truncate] [currently: truncate] display.column_space No description available. [default: 12] [currently: 12] ``` </p></details> #### Code Sample Please resize terminal to have width 127 to reproduce Check with shutil.get_terminal_size() ```python import pandas as pd from io import StringIO import shutil # terminal width (in my case: columns=127, lines=40) print('terminal width: {} characters'.format(shutil.get_terminal_size()[0])) s = 'id,tstamp,00aaaaa,01a,02aaaaa,03a,04aaaaa,05,06aaaa,07aaaaaaaaaaaaa,08aaaaaa,09aaaaaaa,10aa,11aaaaaa,12aaaaaaaaa,13aaaaaaaa,14aaaaaaa,15aaaaaaaa,16a,17aaaaa,18aa,19aaaaaa,20,21,22aaaaaa,23aaaaaa,24aaaaa,25aa,26aaaaaa,27a,28aaaaa,29aaaa\r\n779491690,2019-02-01 00:00:02+00:00,,161.38538188324176,297.461393148902,,,,0.466667,False,False,3,,0.007,53.8849,,0.0323102,-0.4,,0.008,,0.0,,,,17.1,-1e-06,,0.024,,0.045,159.72512756708358\r\n779491691,2019-02-01 00:05:02+00:00,,162.2999981618803,299.5123814547798,,,,0.553571,True,False,3,,0.007,-85.1749,,0.0969305,-0.5,,0.008,,0.0,,,,17.0,-3e-06,,0.031,,0.049,160.6961983114413\r\n779491692,2019-02-01 00:10:02+00:00,,163.1754248277306,301.7498948568431,,,,0.530612,False,False,3,,0.007,,,-0.0646204,-0.4,,0.007,,0.0,,,,17.0,2e-06,,0.026,,0.049,161.6468595698913\r\n779491693,2019-02-01 00:15:02+00:00,,164.00520705009447,304.19960616946184,,,,0.466667,False,False,3,,0.007,,,-0.0323102,-0.4,,0.008,,0.0,,,,17.0,1e-06,,0.024,,0.045,162.5736942291059\r\n779491694,2019-02-01 00:20:02+00:00,,164.78185830034352,306.8905124087089,,,,0.511792,True,False,3,,0.007,128.438,,-0.0323102,-0.4,,0.008,,0.0,,,,17.0,1e-06,,0.031,,0.053,163.47261824257413\r\n' f = StringIO() f.write(s) f.seek(0) df = pd.read_csv(f, index_col=[0, 1]) print(df) ``` The lines of the string representation of the DataFrame are too long, therefore each line spans across two lines (depending on the terminal width; with the given settings it needs 129 characters instead of the available 127). To me this looks like a bug in the DataFrameFormatter. As I understand probably in the write_result method line 839ff Could that be? By the way, I also don't quite understand the display.expand_frame_repr setting. It is now set to True. When I set it to False the DataFrame does not get truncated but the full represenation is printed across multiple lines. Shouldn't that be excactly the other way round? The following issue seems to be related, but I did not find the exact same problem. Hope I didn't miss anything: https://github.com/pandas-dev/pandas/issues/16911 #### Expected Output A DataFrame representation truncated such, that each line fits the terminal width. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.7.6.final.0 python-bits : 64 OS : Windows OS-release : 10 machine : AMD64 processor : Intel64 Family 6 Model 94 Stepping 3, GenuineIntel byteorder : little LC_ALL : None LANG : None LOCALE : None.None pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 45.2.0.post20200209 Cython : 0.29.15 pytest : None hypothesis : None sphinx : 2.4.3 blosc : None feather : 0.4.0 xlsxwriter : 1.2.8 lxml.etree : None html5lib : None pymysql : None psycopg2 : 2.8.4 (dt dec pq3 ext lo64) jinja2 : 2.11.1 IPython : 7.13.0 pandas_datareader: None bs4 : None bottleneck : 1.3.2 fastparquet : 0.3.3 gcsfs : None lxml.etree : None matplotlib : 3.2.0 numexpr : 2.7.1 odfpy : None openpyxl : 3.0.3 pandas_gbq : None pyarrow : 0.15.1 pytables : None pytest : None pyxlsb : None s3fs : None scipy : 1.4.1 sqlalchemy : 1.3.13 tables : 3.6.1 tabulate : None xarray : 0.15.0 xlrd : 1.2.0 xlwt : 1.3.0 xlsxwriter : 1.2.8 numba : 0.48.0 </details>
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32,462
Inconsistent result with cumsum columns
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2020-03-05T14:05:04Z
2021-07-29T06:30:25Z
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I have problem with cumsum and multiple columns ```python >>> df1 = pd.DataFrame({"A": [2, 1, np.nan, 1, 2, 2, 1],"B": [-8, 2, 3, 1, 5, 6, 7],"C": [3, 5, 6, 5, 4, 4, 3]}) >>> df1.groupby("A").cumsum() B C 0 -8 3 1 2 5 2 -1 6 3 3 10 4 -3 7 5 3 11 6 10 13 >>> df1.groupby("A").cumsum() B C 0 -8 3 1 2 5 2 -1 -1 3 3 10 4 -3 7 5 3 11 6 10 13 ``` The cumsum is computed only on the first column B and the column C is left unchanged. Worse, when recomputing then I get the result I would expect. I could accept either behavior but inconsistent result when iterating seems wrong to me.
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32,463
Difference between count and nunique formatting
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2020-03-05T14:13:53Z
2020-10-19T06:44:53Z
2020-10-19T06:44:53Z
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The count with groupby gives the number of entries while nunique gives the number of unique entries. The problem is that we get an additional column ```python >>> df = pd.DataFrame({"A": [0,0,1,1,0], "B": [1,2,3,4,5]}) >>> df.groupby("A").count() B A 0 3 1 2 >>> df.groupby("A").nunique() A B A 0 1 3 1 1 2 ``` Why is the A column being added in nunique output?
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Grouping by all columns of an empty DataFrame should produce MultiIndex, but doesn't
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2
2020-03-05T15:48:21Z
2021-10-16T14:33:36Z
null
CONTRIBUTOR
null
Greetings! This comes up in [cuDF](https://github.com/rapidsai/cudf) in our tests that check for compatibility with Pandas: ``` In [21]: a = pd.DataFrame({'a': [], 'b': [], 'c': []}) In [22]: a.groupby(['a', 'b']).sum().index Out[22]: MultiIndex([], names=['a', 'b']) In [23]: a.groupby(['a', 'b', 'c']).sum().index Out[23]: Index([], dtype='object') ``` Would it be more consistent for grouping by multiple columns to always result in a MultiIndex? Edit: Checked with Pandas 1.0.1 as well as 0.25.3 -- same behaviour.
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32,465
TST: Fixed xfail for tests in pandas/tests/tseries/offsets/test_offsets_properties.py
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6
2020-03-05T16:08:18Z
2021-05-03T12:29:04Z
2020-06-14T17:27:09Z
MEMBER
null
- [x] ref https://github.com/pandas-dev/pandas/pull/32459#issuecomment-595277125 - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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32,466
Should Whitespaces be placed at the begging of a line
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2020-03-05T16:31:41Z
2020-04-28T14:48:42Z
2020-04-28T14:48:42Z
MEMBER
null
As of our current [code style guide](https://dev.pandas.io/docs/development/code_style.html) we are placing whitespaces at the begging of the lines, [Black](https://github.com/psf/black) had a discussion at https://github.com/psf/black/issues/182 (https://github.com/psf/black/pull/1132#issuecomment-594062628 sums all of that discussion) where they decided that when "Black" wraps long strings it will place the whitespace at the begging of the line. I think that we should reconsider/open for discussion the placement of whitespaces over long strings.
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576,449,538
MDExOlB1bGxSZXF1ZXN0Mzg0NDMzNjU3
32,467
CLN: use _values_for_argsort for join_non_unique, join_monotonic
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7
2020-03-05T18:29:29Z
2020-03-13T15:53:19Z
2020-03-11T02:13:24Z
MEMBER
null
With the `.copy()` removed from `Categorical._values_for_argsort`, `ea_backed_index._data._values_for_argsort()` matches `ea_backed_index._ndarray_values` in all extant cases. cc @jorisvandenbossche @TomAugspurger need to confirm a) this is an intended-adjacent use of _values_for_argsort, and not just a coincidence that it matches extant behavior b) the `.copy()` this removes from `Categorical._values_for_argsort` is not important for some un-tested reason xref #32452, #32426
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32,468
Should Groupby.sum modify _selected_obj?
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2020-03-05T18:45:36Z
2021-02-14T15:35:29Z
2021-02-14T15:35:29Z
MEMBER
null
#### Code Sample, a copy-pastable example if possible ```python In [1]: import pandas as pd In [2]: df = pd.DataFrame({"A": ["foo"] * 3 + ["bar"] * 3, "B": [1] * 6}) In [3]: g = df.groupby("A") In [4]: g._selected_obj Out[4]: A B 0 foo 1 1 foo 1 2 foo 1 3 bar 1 4 bar 1 5 bar 1 In [5]: g.sum() Out[5]: B A bar 3 foo 3 In [6]: g._selected_obj Out[6]: B 0 1 1 1 2 1 3 1 4 1 5 1 ``` #### Problem description Noticed this while working on #32332 #### Expected Output I wasn't expecting this to have side-effects #### Output of ``pd.show_versions()`` <details> In [7]: pd.show_versions() /home/SERILOCAL/m.gorelli/miniconda3/envs/pandas-dev/lib/python3.7/site-packages/fastparquet/dataframe.py:5: FutureWarning: pandas.core.index is deprecated and will be removed in a future version. The public classes are available in the top-level namespace. from pandas.core.index import CategoricalIndex, RangeIndex, Index, MultiIndex INSTALLED VERSIONS ------------------ commit : f7bed0583556f66f18f6391eddf3e0802c4933f3 python : 3.7.6.final.0 python-bits : 64 OS : Linux OS-release : 4.15.0-88-generic Version : #88-Ubuntu SMP Tue Feb 11 20:11:34 UTC 2020 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_GB.UTF-8 LOCALE : en_GB.UTF-8 pandas : 1.1.0.dev0+694.gf7bed0583 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 19.3.1 setuptools : 45.1.0.post20200119 Cython : 0.29.14 pytest : 5.3.4 hypothesis : 5.3.0 sphinx : 2.3.1 blosc : 1.8.3 feather : None xlsxwriter : 1.2.7 lxml.etree : 4.4.2 html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : 7.11.1 pandas_datareader: None bs4 : 4.8.2 bottleneck : 1.3.1 fastparquet : 0.3.2 gcsfs : None matplotlib : 3.1.2 numexpr : 2.7.1 odfpy : None openpyxl : 3.0.1 pandas_gbq : None pyarrow : 0.15.1 pytables : None pyxlsb : None s3fs : 0.4.0 scipy : 1.4.1 sqlalchemy : 1.3.12 tables : 3.6.1 tabulate : 0.8.6 xarray : 0.14.1 xlrd : 1.2.0 xlwt : 1.3.0 numba : 0.47.0 </details>
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DOC: fix styling (css) of getting started tutorials
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0
2020-03-05T18:52:26Z
2020-03-10T07:24:41Z
2020-03-10T07:18:29Z
MEMBER
null
The sphinx theme got some styling updates, but this seems to have broken the custom styling of the getting started guide a bit. See eg https://pandas.io/docs/getting_started/intro_tutorials/03_subset_data.html : the question marks are not visible. And there is also some strange green around the code block in the box of installation at https://pandas.io/docs/getting_started/index.html cc @stijnvanhoey
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32,470
Mishandling exception when trying to access inexistent files at private S3 bucket using several pandas.read_ methods
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4
2020-03-05T21:06:26Z
2020-04-21T23:08:35Z
2020-04-21T20:40:17Z
NONE
null
#### Problem description When trying to access a non-existing file on a private S3 bucket, using appropriated credentials, pandas will throw a ConnectionTimeoutError instead of a FileNotFoundError. I tested the following read_ methods and got same behavior in all: **read_csv, read_excel, read_fwf, read_json, read_msgpack, read_parquet,** You got to have right credentials and try to access a private bucket to reproduce it. The s3fs library implicitly reads credentials from environment variables if you have it named properly (AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY). #### Code to reproduce the issue ```python import pandas import s3fs fs = s3fs.S3FileSystem() file_name = 's3://<my_bucket>/<my_file>' pandas.read_csv(file_name) ``` #### Root Cause I checked source files and found the following excerpt from pandas/io/s3.py ```python fs = s3fs.S3FileSystem(anon=False) try: filepath_or_buffer = fs.open(_strip_schema(filepath_or_buffer), mode) except (compat.FileNotFoundError, NoCredentialsError): # boto3 has troubles when trying to access a public file # when credentialed... # An OSError is raised if you have credentials, but they # aren't valid for that bucket. # A NoCredentialsError is raised if you don't have creds # for that bucket. fs = s3fs.S3FileSystem(anon=True) filepath_or_buffer = fs.open(_strip_schema(filepath_or_buffer), mode) return filepath_or_buffer, None, compression, True ``` Pandas is trying to workaround an issue of boto3 and when receiving FileNotFoundError or NoCredentialsError it chances connection credentials to anonymous (see the anon=True argument while creating object fs from class S3FileSystem) and try it again. This help accessing public buckets/files while using S3 credentials, as comment states. However, when trying to access a non-existing file in a private bucket S3 will not return a file not found it will let connection timeout. They probably do that for security reasons, not disclosure private file existence without proper credentials. #### Why this is an issue Instead of quiclky throwns a FileNotFoundError it takes a while and then throwns a ConnectionTimeOutError. #### Double check the cause Just to make sure this is the cause I tried the code below. However, I don't really understand all implications to check if it is a acceptable solution. ```python fs = s3fs.S3FileSystem(anon=False) try: filepath_or_buffer = fs.open(_strip_schema(filepath_or_buffer), mode) except (compat.FileNotFoundError, NoCredentialsError): # boto3 has troubles when trying to access a public file # when credentialed... # An OSError is raised if you have credentials, but they # aren't valid for that bucket. # A NoCredentialsError is raised if you don't have creds # for that bucket. if fs.exists(filepath_or_buffer[0:filepath_or_buffer.rfind('/')]): raise FileNotFoundError(filepath_or_buffer, 'not found') else: fs = s3fs.S3FileSystem(anon=True) filepath_or_buffer = fs.open(_strip_schema(filepath_or_buffer), mode) return filepath_or_buffer, None, compression, True ``` I just test if credentials can access up directory. If yes It conclude this is not a credentials issue and thrown a FileNotFoundError. #### Expected Output Pandas read methods thrown FileNotFoundError when file doesn't exist on private S3 buckets. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.6.5.final.0 python-bits : 64 OS : Windows OS-release : 10 machine : AMD64 processor : Intel64 Family 6 Model 78 Stepping 3, GenuineIntel byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : None.None pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 39.0.1 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : None IPython : None pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : None matplotlib : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : 0.16.0 pytables : None pytest : None pyxlsb : None s3fs : 0.4.0 scipy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : None </details>
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Dataframe Groupby value_counts with bins parameter
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2
2020-03-05T21:08:02Z
2021-07-29T06:32:08Z
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Found on Stack Overflow post [here](https://stackoverflow.com/q/60553500/6361531) ```python df=pd.DataFrame([[0,0],[1,100],[0,100],[2,0],[3,100],[4,100],[4,100],[4,100],[1,100],[3,100]],columns=['key','score']) df.groupby('key')['score'].value_counts(bins=[0,20,40,60,80,100]) ``` #### Problem description Outputs counts at the with wrong index labels. **_Note:_** data only occurs in 0-20 and 80-100. ``` key score 0 (-0.001, 20.0] 1 (20.0, 40.0] 1 (40.0, 60.0] 0 (60.0, 80.0] 0 (80.0, 100.0] 0 1 (20.0, 40.0] 2 (-0.001, 20.0] 0 (40.0, 60.0] 0 (60.0, 80.0] 0 (80.0, 100.0] 0 2 (-0.001, 20.0] 1 (20.0, 40.0] 0 (40.0, 60.0] 0 (60.0, 80.0] 0 (80.0, 100.0] 0 3 (20.0, 40.0] 2 (-0.001, 20.0] 0 (40.0, 60.0] 0 (60.0, 80.0] 0 (80.0, 100.0] 0 4 (20.0, 40.0] 3 (-0.001, 20.0] 0 (40.0, 60.0] 0 (60.0, 80.0] 0 (80.0, 100.0] 0 Name: score, dtype: int64 ``` #### Expected Output `df.groupby('key')['score'].apply(pd.Series.value_counts, bins=[0,20,40,60,80,100])` ``` key 0 (80.0, 100.0] 1 (-0.001, 20.0] 1 (60.0, 80.0] 0 (40.0, 60.0] 0 (20.0, 40.0] 0 1 (80.0, 100.0] 2 (60.0, 80.0] 0 (40.0, 60.0] 0 (20.0, 40.0] 0 (-0.001, 20.0] 0 2 (-0.001, 20.0] 1 (80.0, 100.0] 0 (60.0, 80.0] 0 (40.0, 60.0] 0 (20.0, 40.0] 0 3 (80.0, 100.0] 2 (60.0, 80.0] 0 (40.0, 60.0] 0 (20.0, 40.0] 0 (-0.001, 20.0] 0 4 (80.0, 100.0] 3 (60.0, 80.0] 0 (40.0, 60.0] 0 (20.0, 40.0] 0 (-0.001, 20.0] 0 Name: score, dtype: int64 ``` #### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] INSTALLED VERSIONS ------------------ commit : None python : 3.7.3.final.0 python-bits : 64 OS : Windows OS-release : 10 machine : AMD64 processor : Intel64 Family 6 Model 63 Stepping 2, GenuineIntel byteorder : little LC_ALL : None LANG : None LOCALE : None.None pandas : 1.0.1 numpy : 1.16.4 pytz : 2019.1 dateutil : 2.8.0 pip : 19.1.1 setuptools : 41.0.1 Cython : 0.29.12 pytest : 5.0.1 hypothesis : None sphinx : 2.1.2 blosc : None feather : None xlsxwriter : 1.1.8 lxml.etree : 4.3.4 html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.10.1 IPython : 7.7.0 pandas_datareader: None bs4 : 4.7.1 bottleneck : 1.2.1 fastparquet : None gcsfs : None lxml.etree : 4.3.4 matplotlib : 3.1.0 numexpr : 2.6.9 odfpy : None openpyxl : 2.6.2 pandas_gbq : None pyarrow : None pytables : None pytest : 5.0.1 pyxlsb : None s3fs : None scipy : 1.3.0 sqlalchemy : 1.3.5 tables : 3.5.2 tabulate : 0.8.6 xarray : None xlrd : 1.2.0 xlwt : 1.3.0 xlsxwriter : 1.1.8 numba : 0.45.0 </details>
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CLN: remove unreachable _internal_get_values in blocks
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2020-03-05T21:16:25Z
2020-03-07T15:14:48Z
2020-03-07T11:02:48Z
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_putmask_smart is only called from Block.putmask, which ExtensionBlock overrides.
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ENH: Feature request, date type
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2020-03-05T22:40:03Z
2021-10-14T14:39:06Z
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CONTRIBUTOR
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There currently isn’t any native date dtype in pandas, which makes it impossible to integrate this type into file formats like parquet, where schema is defined
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pandas documentation error
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pandas documentation Date: Feb 05, 2020 Version: 1.0.1 Download documentation: PDF Version Why this PDF Version have no contents>
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CLN: assorted cleanups, annotations
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ENH: implement ExtensionIndex.insert
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MDExOlB1bGxSZXF1ZXN0Mzg0NTcwMjQ4
32,477
BUG: iloc.__setitem__ with duplicate columns
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2
2020-03-06T00:33:41Z
2020-03-11T02:38:32Z
2020-03-11T02:35:22Z
MEMBER
null
- [x] closes #15686 - [x] closes #22036 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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MDExOlB1bGxSZXF1ZXN0Mzg0NTk4ODU4
32,478
Made apt changes to pandas.Series.str.replace()
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1
2020-03-06T02:14:16Z
2020-03-20T03:20:23Z
2020-03-06T15:25:33Z
CONTRIBUTOR
null
- [x] closes #31225 - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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BUG: Fix issue with datetime[ns, tz] input in Block.setitem GH32395
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16
2020-03-06T03:08:40Z
2020-05-25T19:29:50Z
2020-05-25T17:39:42Z
CONTRIBUTOR
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- [x] closes #32395 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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32,480
json_normalize errors if meta fields are integer
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2020-03-06T03:22:39Z
2020-03-10T20:24:51Z
2020-03-10T20:24:14Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd data = [{"person_id": "test", "test_field": 1, "access": [{"step": 1, "phase":"starting"}, {"step":2, "phase":"ending"} ] }] df = pd.json_normalize(data,"access",meta=["person_id","test_field"]) print(df) ``` #### Problem description If meta fields are integer we get the below error. json_normalize works fine for string datatype Traceback (most recent call last): File "C:/Users/HOME/PycharmProjects/pandas_test/pandas_test.py", line 12, in <module> df = pd.json_normalize(data,"access",meta=["person_id","test_field"]) File "C:\Users\HOME\Anaconda3\envs\pandas_test\lib\site-packages\pandas\io\json\_normalize.py", line 327, in _json_normalize _recursive_extract(data, record_path, {}, level=0) File "C:\Users\HOME\Anaconda3\envs\pandas_test\lib\site-packages\pandas\io\json\_normalize.py", line 314, in _recursive_extract meta_val = _pull_field(obj, val[level:]) File "C:\Users\HOME\Anaconda3\envs\pandas_test\lib\site-packages\pandas\io\json\_normalize.py", line 246, in _pull_field f"{js} has non iterable value {result} for path {spec}. " TypeError: {'person_id': 'test', 'test_field': 1, 'access': [{'step': 1, 'phase': 'starting'}, {'step': 2, 'phase': 'ending'}]} has non iterable value 1 for path ['test_field']. Must be iterable or null. #### Expected Output #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.7.6.final.0 python-bits : 64 OS : Windows OS-release : 10 machine : AMD64 processor : AMD64 Family 16 Model 10 Stepping 0, AuthenticAMD byteorder : little LC_ALL : None LANG : None LOCALE : None.None pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 45.2.0.post20200210 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : None IPython : None pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : None matplotlib : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pytest : None pyxlsb : None s3fs : None scipy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : None </details>
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CLN: imports in pandas/io/excel/_base.py
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2
2020-03-06T08:12:48Z
2020-03-07T11:00:43Z
2020-03-06T19:01:12Z
MEMBER
null
- [ ] closes #xxxx - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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32,482
Plot bar in Pandas 0.25.3 not changing the colors for each of the bars
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2020-03-06T09:08:21Z
2020-03-06T09:43:24Z
2020-03-06T09:42:55Z
NONE
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```python # Code import pandas as pd import matplotlib.pyplot as plt import numpy as np df = pd.DataFrame({'category': ['A', 'B', 'C'], 'value': [-1432.32, 10.43, 30000.00], 'db-id': [1234, 2424, 251] }) df.category.value_counts().plot.bar(color = plt.cm.Paired.colors) ``` #### Problem description When using the above code on pandas '0.25.3', all bars are plotted with the same color. I would like to have them plotted each with its own color. It used to work before but all of a sudden it doesnt. Possibly due to the pandas version. Any clue?
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32,483
CLN: Split and fixturized test_fillna in tests/base/test_ops.py
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2
2020-03-06T09:23:46Z
2020-03-11T03:54:08Z
2020-03-11T03:53:52Z
CONTRIBUTOR
null
part of #23877 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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32,484
CLN: Remove redundant index test from tests/base/test_ops.py
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6
2020-03-06T09:48:04Z
2020-03-14T20:12:58Z
2020-03-14T20:12:54Z
CONTRIBUTOR
null
part of #23877 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` Boolean indexing is already thoroughly tested in `test_series_mask_boolean` in `tests/indexes/test_na_indexing.py` - [see here](https://github.com/pandas-dev/pandas/blob/master/pandas/tests/indexing/test_na_indexing.py#L7-L61)
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CLN: Replace isinstance(foo, Class) with isinstance(foo, ABCClass)
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2020-03-06T09:59:31Z
2020-03-14T14:08:14Z
2020-03-11T01:56:35Z
MEMBER
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- [x] ref #27353 - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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to_csv fails silently with s3fs
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6
2020-03-06T10:02:22Z
2021-08-03T10:35:42Z
2020-04-21T12:39:06Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd import numpy as np df = pd.DataFrame(np.random.randint(0,100,size=(100, 4)), columns=list('ABCD')) df.to_csv("s3://super_dumb_s3_bucket/not_real.csv") ``` #### Problem description If you provide an invalid s3 path (e.g. a bucket that you don't have access to), this command fails silently. #### Expected Output Raise some exception at least. #### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] INSTALLED VERSIONS ------------------ commit : None python : 3.7.2.final.0 python-bits : 64 OS : Linux OS-release : 4.15.0-88-generic machine : x86_64 processor : byteorder : little LC_ALL : None LANG : C.UTF-8 LOCALE : en_US.UTF-8 pandas : 0.25.1 numpy : 1.17.0 pytz : 2019.2 dateutil : 2.8.0 pip : 19.0.2 setuptools : 40.8.0 Cython : None pytest : 3.10.1 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : 4.4.1 html5lib : None pymysql : None psycopg2 : 2.8.3 (dt dec pq3 ext lo64) jinja2 : 2.10.1 IPython : 7.9.0 pandas_datareader: None bs4 : 4.8.0 bottleneck : None fastparquet : None gcsfs : None lxml.etree : 4.4.1 matplotlib : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None s3fs : None scipy : 1.3.1 sqlalchemy : None tables : None xarray : None xlrd : None xlwt : None xlsxwriter : None </details>
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MDExOlB1bGxSZXF1ZXN0Mzg0NzQxNzkw
32,487
CLN: Remove redundant tests for .duplicated and .drop_duplicates in tests/base
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7
2020-03-06T10:20:17Z
2020-03-15T00:51:49Z
2020-03-15T00:51:19Z
CONTRIBUTOR
null
part of #23877 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` duplicated and drop_duplicates are already thoroughly tested in `tests/indexes` and `tests/series`. I added comments to highlight the redundancy and extended the existing test cases where needed.
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32,488
Problem with docker build to contribute on Mac
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2020-03-06T10:56:50Z
2020-05-16T16:51:19Z
null
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null
Hi. I'm not sure if this is the right place to post this but I would love to contribute so I'm asking here. I apologise if this is the wrong place to post it. If it is, could someone redirect me to a better person or place to ask? I use: - Mac OS version 10.15.1 - I used brew cask install anaconda to install anaconda and I have `export PATH=~/opt/anaconda3/bin:$PATH` in my .zshrc file. conda --version outputs `conda 4.7.12` I'm having trouble using docker with this project. This is what happens when I follow [VS code remote containers](https://code.visualstudio.com/docs/remote/containers) and run `Remote-Containers: Reopen in Container`. My error is below (I've removed the bits that were successful). [2020-03-06T10:49:02.538Z] [PID 15817] [29814 ms] Step 8/9 : RUN conda env update -n base -f "$pandas_home/environment.yml" [2020-03-06T10:49:02.538Z] [PID 15817] [29814 ms] [2020-03-06T10:49:05.305Z] [PID 15817] [32581 ms] ---> Running in d123b4efef44 [2020-03-06T10:49:05.960Z] [PID 15817] [33236 ms] Traceback (most recent call last): File "/opt/conda/bin/conda", line 12, in <module> from conda.cli import main ModuleNotFoundError: No module named 'conda' [2020-03-06T10:49:06.502Z] [PID 15817] [33778 ms] The command '/bin/sh -c conda env update -n base -f "$pandas_home/environment.yml"' returned a non-zero code: 1 [2020-03-06T10:49:06.505Z] [PID 15817] [33781 ms] Failed: Building an image from the Dockerfile (this can take a while). [2020-03-06T10:49:06.508Z] [PID 15817] [33784 ms] Command failed: docker build -f /Users/mxchaeltrxn/Documents/10-19_learning/14_open_source/14.03_pandas/Dockerfile -t vsc-14.03_pandas-a5707944db87809e2912a2e16627e33b /Users/mxchaeltrxn/Documents/10-19_learning/14_open_source/14.03_pandas
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MDExOlB1bGxSZXF1ZXN0Mzg0Nzc4Njc1
32,489
CLN: trying isort-dev
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2
2020-03-06T11:44:45Z
2020-03-24T13:41:18Z
2020-03-24T13:39:53Z
MEMBER
null
- [ ] closes #xxxx - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry --- Trying ```isort``` 5.0.0 which is still under development.
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32,490
BUG: Fix bug, where BooleanDtype columns are converted to Int64
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12
2020-03-06T12:34:41Z
2020-03-26T14:28:41Z
2020-03-11T01:48:35Z
CONTRIBUTOR
null
- [x] closes #32287 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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32,491
DOC indexing: Google search for 'pandas greater than' returns `pandas.DataFrame.ge` as #1, and `pandas.DataFrame.gt`/`pandas.Series.gt` aren't even found
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3
2020-03-06T12:39:19Z
2020-09-01T22:50:31Z
2020-09-01T22:50:31Z
NONE
null
#### Problem description (I'm aware that Google SEO is not under pandas' control. However this one's quite important, and nowhere in the pandas doc does it actually tell us where/how to report SEO fails, if at all. So please tell us how and where to report things like this. Are all pandas doc pages automatically submitted to be crawled by Google?) The indexing of pandas DataFrame/Series operators seems to have some holes: A Google search for *'pandas greater than'* returns ['pandas.DataFrame.ge'](https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.ge.html) as #1, and `pandas.DataFrame.gt`/`pandas.Series.gt` aren't even found, let alone in the top 10. 1. The #1 hit should be `pandas.DataFrame.gt` 1. `pandas.Series.gt` should also be found, #2, but they're not. Similarly #3 `pandas.Series.between`, `pandas.Series.ge` etc. A Google search for *'pandas less than'* is slightly better: 1. #1 hit is `pandas.DataFrame.le` (pandas 1.0.1 doc) 1. #2 hit is `pandas.Series.le` (pandas 1.0.1 doc) 1. #3 hit is `pandas.Series.between` (pandas 0.23.1 doc(?), not 1.0.x) 1. The #1 and #2 hits should be `pandas.DataFrame.lt`/`pandas.Series.lt` #### Expected Output as above
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576,911,771
MDU6SXNzdWU1NzY5MTE3NzE=
32,492
dataframe.groupby incorrect with multiindex and None value
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null
2
2020-03-06T12:51:08Z
2021-07-29T06:35:22Z
null
NONE
null
#### Minimally reproducible example ```python # pandas==0.24.2 df = pd.DataFrame(data={ 'A': ['a1','a2',None], 'B': ['b1','b2','b1'], 'val': [1,2,3], }) print(df) print('\n') grps = df.groupby(['A', 'B']) print(grps.get_group(('a2','b1'))) ``` #### Problem description Selecting a group which doesn't appear, I obtain a group which should not exist. #### Expected Output KeyError #### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] INSTALLED VERSIONS ------------------ commit: None python: 3.7.3.final.0 python-bits: 64 OS: Windows OS-release: 10 machine: AMD64 processor: Intel64 Family 6 Model 62 Stepping 4, GenuineIntel byteorder: little LC_ALL: None LANG: None LOCALE: None.None pandas: 0.24.2 pytest: None pip: 19.0.3 setuptools: 40.8.0 Cython: None numpy: 1.16.2 scipy: 1.2.1 pyarrow: None xarray: None IPython: 7.4.0 sphinx: 2.0.1 patsy: 0.5.1 dateutil: 2.8.0 pytz: 2018.9 blosc: None bottleneck: None tables: None numexpr: None feather: None matplotlib: 3.0.3 openpyxl: None xlrd: 1.2.0 xlwt: None xlsxwriter: 1.1.7 lxml.etree: 4.3.3 bs4: None html5lib: 1.0.1 sqlalchemy: 1.3.8 pymysql: 0.9.3 psycopg2: 2.8.3 (dt dec pq3 ext lo64) jinja2: 2.10 s3fs: None fastparquet: None pandas_gbq: None pandas_datareader: None gcsfs: None </details>
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576,927,563
MDU6SXNzdWU1NzY5Mjc1NjM=
32,493
to_numeric fails with empty data and downcast="unsigned"
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4
2020-03-06T13:21:28Z
2020-03-16T16:00:40Z
2020-03-16T02:30:10Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python pd.to_numeric([], downcast="unsigned") ``` #### Problem description The code currently calls `np.min()` on the data which fails when the data is empty. This does not happen for any other downcast. ``` Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/.../lib/python3.7/site-packages/pandas/core/tools/numeric.py", line 163, in to_numeric elif downcast == "unsigned" and np.min(values) >= 0: File "<__array_function__ internals>", line 6, in amin File "/.../lib/python3.7/site-packages/numpy/core/fromnumeric.py", line 2793, in amin keepdims=keepdims, initial=initial, where=where) File "/.../lib/python3.7/site-packages/numpy/core/fromnumeric.py", line 90, in _wrapreduction return ufunc.reduce(obj, axis, dtype, out, **passkwargs) ValueError: zero-size array to reduction operation minimum which has no identity ``` #### Expected Output array([], dtype=uint8) #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.7.6.final.0 python-bits : 64 OS : Darwin OS-release : 19.3.0 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : en_GB.UTF-8 LOCALE : en_GB.UTF-8 pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 41.2.0 Cython : None pytest : 5.3.5 hypothesis : None sphinx : None blosc : None feather : 0.4.0 xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.11.1 IPython : 7.13.0 pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : 0.6.0 lxml.etree : None matplotlib : 3.1.3 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : 0.16.0 pytables : None pytest : 5.3.5 pyxlsb : None s3fs : None scipy : 1.4.1 sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : 0.48.0 </details>
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576,967,058
MDU6SXNzdWU1NzY5NjcwNTg=
32,494
Dataframe.groupby aggregations with categorical columns lead to incorrect results.
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2
2020-03-06T14:28:25Z
2020-06-14T15:02:05Z
2020-06-14T15:02:05Z
CONTRIBUTOR
null
#### Code Sample ```python # In[2]: import pandas as pd def create_df(): df = pd.DataFrame( { 'major_id': [1, 2, 1, 2, 2], 'minor_id': ['a', 'b', 'c', 'd', 'e'], 'values': [1, 2, 3, 4, 5] } ) return df def groupby(df): df['max_value'] = ( df .groupby(['major_id', 'minor_id']) ['values'] .transform('max') ) return df # In[3]: # correct result df = create_df() groupby(df) # Out[3] " major_id minor_id values max_value\n", "0 1 a 1 1\n", "1 2 b 2 2\n", "2 1 c 3 3\n", "3 2 d 4 4\n", "4 2 e 5 5" # In[4]: # incorrect result: groupby with one non-categorical column and one categorical column df = create_df() df = df.astype({'minor_id': 'category'}) groupby(df) # Out[4] " major_id minor_id values max_value\n", "0 1 a 1 1.0\n", "1 2 b 2 3.0\n", "2 1 c 3 NaN\n", "3 2 d 4 NaN\n", "4 2 e 5 NaN" ``` #### Problem description `groupby` with one non-categorical column and one categorical column leads to incorrect aggregations (wrong values, or `NAN`s). #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.7.4.final.0 python-bits : 64 OS : Darwin OS-release : 18.7.0 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : en_GB.UTF-8 LOCALE : en_GB.UTF-8 pandas : 1.0.1 numpy : 1.17.3 pytz : 2019.3 dateutil : 2.8.0 pip : 19.2.2 setuptools : 41.0.1 Cython : None pytest : 5.2.1 hypothesis : 5.5.4 sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : 2.8.4 (dt dec pq3 ext lo64) jinja2 : 2.10.1 IPython : 7.7.0 pandas_datareader: None bs4 : None bottleneck : None fastparquet : 0.3.3 gcsfs : None lxml.etree : None matplotlib : 3.1.1 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : 0.16.0 pytables : None pytest : 5.2.1 pyxlsb : None s3fs : 0.4.0 scipy : 1.3.1 sqlalchemy : 1.3.10 tables : None tabulate : 0.8.5 xarray : None xlrd : None xlwt : None xlsxwriter : None numba : 0.48.0 </details>
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576,999,663
MDU6SXNzdWU1NzY5OTk2NjM=
32,495
read_csv option 'skipfooter' crashes with lines starting with "
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2020-03-06T15:21:02Z
2020-03-07T19:17:21Z
2020-03-07T19:17:21Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd # Generate the test-file data_file = 'test.txt' txt = """yyyy 1991 2002 "a """ with open(data_file, 'w') as fh: fh.write(txt) # Parsing working with: df_ok = pd.read_csv(data_file, nrows=2) print(df_ok) # ... and with df_ok2 = pd.read_csv(data_file, skipfooter=1, delimiter='[,]', engine='python') print(df_ok2) # ... but crashes with df_crash1 = pd.read_csv(data_file, skipfooter=1, delimiter=',', engine='python') print(df_crash1) # ... and with df_crash2 = pd.read_csv(data_file, skipfooter=1) print(df_crash2) # in order to reach those last 2 lines, you have to comment out lines 24-25 # with the error message: # ------------------------ # pandas.errors.ParserError: unexpected end of data. Error could possibly be # due to parsing errors in the skipped footer rows (the skipfooter keyword is # only applied after Python's csv library has parsed all rows). # Process terminated with an exit code of 1 ``` #### Problem description Lines in txt-files that start with " can lead to crashes when these lines should be skipped with the option 'skipfooter'. Funnily, this does NOT happen then the option delimiter='[,]', engine='python' is set, but DOES crash when the same option is set with delimiter=',', engine='python' The same data are read in correctly when the number of rows is limited with the option 'nrows'. #### Expected Output yyyy 0 1991 1 2002 yyyy 0 1991 1 2002 yyyy 0 1991 1 2002 yyyy 0 1991 1 2002 #### Output of above code sample: <details> Traceback (most recent call last): File "c:\Programs\WPy64-3740\python-3.7.4.amd64\lib\site-packages\pandas\io\parsers.py", line 2854, in _next_iter_line return next(self.data) _csv.Error: unexpected end of data During handling of the above exception, another exception occurred: Traceback (most recent call last): File "d:\Users\thomas\Data\CloudStation\Teaching\Stats\Coding\error_report.py", line 24, in <module> df_crash1 = pd.read_csv(data_file, skipfooter=1, delimiter=',', engine='python') File "c:\Programs\WPy64-3740\python-3.7.4.amd64\lib\site-packages\pandas\io\parsers.py", line 702, in parser_f return _read(filepath_or_buffer, kwds) File "c:\Programs\WPy64-3740\python-3.7.4.amd64\lib\site-packages\pandas\io\parsers.py", line 435, in _read data = parser.read(nrows) File "c:\Programs\WPy64-3740\python-3.7.4.amd64\lib\site-packages\pandas\io\parsers.py", line 1139, in read ret = self._engine.read(nrows) File "c:\Programs\WPy64-3740\python-3.7.4.amd64\lib\site-packages\pandas\io\parsers.py", line 2388, in read content = self._get_lines(rows) File "c:\Programs\WPy64-3740\python-3.7.4.amd64\lib\site-packages\pandas\io\parsers.py", line 3128, in _get_lines row_num=self.pos + rows + 1) File "c:\Programs\WPy64-3740\python-3.7.4.amd64\lib\site-packages\pandas\io\parsers.py", line 2873, in _next_iter_line self._alert_malformed(msg, row_num) File "c:\Programs\WPy64-3740\python-3.7.4.amd64\lib\site-packages\pandas\io\parsers.py", line 2835, in _alert_malformed raise ParserError(msg) pandas.errors.ParserError: unexpected end of data. Error could possibly be due to parsing errors in the skipped footer rows (the skipfooter keyword is only applied after Python's csv library has parsed all rows). Process terminated with an exit code of 1 </details>
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577,031,386
MDU6SXNzdWU1NzcwMzEzODY=
32,496
dtype passed into read_csv as an arg not passed to the dataframe when being created
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2020-03-06T16:13:29Z
2020-03-11T14:01:24Z
2020-03-11T14:01:24Z
NONE
null
https://github.com/pandas-dev/pandas/blob/015c1c154b9bc70d3b1981ba1dc31c09676065bf/pandas/io/parsers.py#L1143 Is this the desired behaviour? Maybe I am missing something but when we pass dtype to read_csv, the dtype is not used anywhere. Passing it to the dataframe when creating it seems like a good place for that.
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32,497
[Regression] DataFrame.replace throws TypeError when to_replace is list and DF has categorical
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2020-03-06T16:15:43Z
2020-03-07T16:21:15Z
2020-03-06T21:54:26Z
NONE
null
#### Code Sample ```python df = pd.DataFrame({ 'x': pd.Series([-np.inf, np.inf]), 'y': pd.Series(["a", "b"], dtype="category") }) df.replace([-np.inf, np.inf], np.nan) ``` results in ``` ... ~/anaconda/envs/grapy/lib/python3.7/site-packages/pandas/core/indexes/base.py in __contains__(self, key) 3898 @Appender(_index_shared_docs["contains"] % _index_doc_kwargs) 3899 def __contains__(self, key) -> bool: -> 3900 hash(key) 3901 try: 3902 return key in self._engine TypeError: unhashable type: 'list' ``` #### Problem description When a DF contains a categorical column, and when `to_replace` argument is a list, `replace()` throws `TypeError: unhashable type: 'list'`. #### Expected Output When the `to_replace` argument is a tuple rather than a list (which is not a documented option), all seems good: ```python df.replace((-np.inf, np.inf), np.nan) ``` ``` x y 0 NaN a 1 NaN b ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.7.6.final.0 python-bits : 64 OS : Darwin OS-release : 19.2.0 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : None LOCALE : None.UTF-8 pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.0 pip : 20.0.2 setuptools : 45.2.0.post20200209 Cython : None pytest : 5.3.5 hypothesis : None sphinx : 2.4.3 blosc : None feather : None xlsxwriter : None lxml.etree : 4.4.1 html5lib : None pymysql : None psycopg2 : None jinja2 : 2.11.1 IPython : 7.12.0 pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : 4.4.1 matplotlib : 3.1.3 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : 0.16.0 pytables : None pytest : 5.3.5 pyxlsb : None s3fs : None scipy : 1.4.1 sqlalchemy : None tables : None tabulate : None xarray : None xlrd : 1.2.0 xlwt : None xlsxwriter : None numba : 0.48.0 </details>
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577,047,331
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32,498
Local test failure pandas.tests.frame.test_analytics
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2020-03-06T16:40:24Z
2021-07-29T06:36:06Z
2021-07-29T06:36:05Z
MEMBER
null
Running ``` pytest -q --cache-clear pandas/tests/frame/test_analytics.py ``` Yield the following error: <details> ``` ___________________________ TestDataFrameAnalytics.test_mean_mixed_string_decimal ____________________________ TypeError: unsupported operand type(s) for +: 'int' and 'str' The above exception was the direct cause of the following exception: self = Decimal('3351.00'), other = Decimal('572.00'), context = None def __add__(self, other, context=None): """Returns self + other. -INF + INF (or the reverse) cause InvalidOperation errors. """ > other = _convert_other(other) /usr/lib/python3.8/_pydecimal.py:1158: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ other = Decimal('572.00'), raiseit = False, allow_float = False def _convert_other(other, raiseit=False, allow_float=False): """Convert other to Decimal. Verifies that it's ok to use in an implicit construction. If allow_float is true, allow conversion from float; this is used in the comparison methods (__eq__ and friends). """ > if isinstance(other, Decimal): E SystemError: <built-in function isinstance> returned a result with an error set /usr/lib/python3.8/_pydecimal.py:6017: SystemError The above exception was the direct cause of the following exception: self = Decimal('3351.00'), other = Decimal('609.00'), context = None def __add__(self, other, context=None): """Returns self + other. -INF + INF (or the reverse) cause InvalidOperation errors. """ > other = _convert_other(other) /usr/lib/python3.8/_pydecimal.py:1158: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ other = Decimal('609.00'), raiseit = False, allow_float = False def _convert_other(other, raiseit=False, allow_float=False): """Convert other to Decimal. Verifies that it's ok to use in an implicit construction. If allow_float is true, allow conversion from float; this is used in the comparison methods (__eq__ and friends). """ > if isinstance(other, Decimal): E SystemError: <built-in function isinstance> returned a result with an error set /usr/lib/python3.8/_pydecimal.py:6017: SystemError The above exception was the direct cause of the following exception: self = Decimal('3351.00'), other = Decimal('820.00'), context = None def __add__(self, other, context=None): """Returns self + other. -INF + INF (or the reverse) cause InvalidOperation errors. """ > other = _convert_other(other) /usr/lib/python3.8/_pydecimal.py:1158: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ other = Decimal('820.00'), raiseit = False, allow_float = False def _convert_other(other, raiseit=False, allow_float=False): """Convert other to Decimal. Verifies that it's ok to use in an implicit construction. If allow_float is true, allow conversion from float; this is used in the comparison methods (__eq__ and friends). """ > if isinstance(other, Decimal): E SystemError: <built-in function isinstance> returned a result with an error set /usr/lib/python3.8/_pydecimal.py:6017: SystemError The above exception was the direct cause of the following exception: self = <pandas.tests.frame.test_analytics.TestDataFrameAnalytics object at 0x612b1fcb3700> def test_mean_mixed_string_decimal(self): # GH 11670 # possible bug when calculating mean of DataFrame? d = [ {"A": 2, "B": None, "C": Decimal("628.00")}, {"A": 1, "B": None, "C": Decimal("383.00")}, {"A": 3, "B": None, "C": Decimal("651.00")}, {"A": 2, "B": None, "C": Decimal("575.00")}, {"A": 4, "B": None, "C": Decimal("1114.00")}, {"A": 1, "B": "TEST", "C": Decimal("241.00")}, {"A": 2, "B": None, "C": Decimal("572.00")}, {"A": 4, "B": None, "C": Decimal("609.00")}, {"A": 3, "B": None, "C": Decimal("820.00")}, {"A": 5, "B": None, "C": Decimal("1223.00")}, ] df = pd.DataFrame(d) > result = df.mean() pandas/tests/frame/test_analytics.py:499: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ pandas/core/generic.py:11039: in stat_func return self._reduce( pandas/core/frame.py:7876: in _reduce result = f(values) pandas/core/frame.py:7828: in f return op(x, axis=axis, skipna=skipna, **kwds) pandas/core/nanops.py:127: in f result = alt(values, axis=axis, skipna=skipna, **kwds) pandas/core/nanops.py:560: in nanmean the_sum = _ensure_numeric(values.sum(axis, dtype=dtype_sum)) ../../Venvs/venv-pandas/lib/python3.8/site-packages/numpy/core/_methods.py:38: in _sum return umr_sum(a, axis, dtype, out, keepdims, initial, where) /usr/lib/python3.8/_pydecimal.py:1158: in __add__ other = _convert_other(other) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ other = Decimal('1223.00'), raiseit = False, allow_float = False def _convert_other(other, raiseit=False, allow_float=False): """Convert other to Decimal. Verifies that it's ok to use in an implicit construction. If allow_float is true, allow conversion from float; this is used in the comparison methods (__eq__ and friends). """ > if isinstance(other, Decimal): E SystemError: <built-in function isinstance> returned a result with an error set /usr/lib/python3.8/_pydecimal.py:6017: SystemError 1 failed, 90 passed, 1 xfailed in 1.89s ``` </details> --- Output of ```pd.show_versions()```: <details> INSTALLED VERSIONS ------------------ commit : f6b3e82b5514da97b48918c99bd28a07b754291b python : 3.8.1.final.0 python-bits : 64 OS : Linux OS-release : 5.4.23.a-1-hardened Version : #1 SMP PREEMPT Sun, 01 Mar 2020 18:23:23 +0000 machine : x86_64 processor : byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.1.0.dev0+696.gf6b3e82b5 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 45.2.0 Cython : 0.29.15 pytest : 5.3.5 hypothesis : 5.6.0 sphinx : 2.4.4 blosc : 1.8.3 feather : None xlsxwriter : 1.2.8 lxml.etree : 4.5.0 html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.11.1 IPython : 7.13.0 pandas_datareader: None bs4 : 4.8.2 bottleneck : 1.3.2 fastparquet : 0.3.3 gcsfs : None matplotlib : 3.2.0 numexpr : 2.7.1 odfpy : None openpyxl : 3.0.1 pandas_gbq : None pyarrow : 0.16.0 pytables : None pyxlsb : None s3fs : 0.4.0 scipy : 1.4.1 sqlalchemy : 1.3.13 tables : 3.6.1 tabulate : 0.8.6 xarray : 0.15.0 xlrd : 1.2.0 xlwt : 1.3.0 numba : 0.48.0 </details>
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32,499
Better error message for OOB result
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3
2020-03-06T17:10:53Z
2020-03-12T12:22:19Z
2020-03-11T01:45:54Z
CONTRIBUTOR
null
Closes #31774
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577,074,681
MDU6SXNzdWU1NzcwNzQ2ODE=
32,500
[Regression] to_json doesn't export Int64 dtype correctly
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2
2020-03-06T17:29:12Z
2020-05-06T15:43:03Z
2020-03-06T20:35:48Z
NONE
null
#### Code Sample In 1.0.1: ```python pd.Series([0,1,None,3], dtype="Int64").to_json() >> '{"0":0,"1":1,"2":{},"3":3}' ``` #### Problem description Not sure if that's the desired result, notice the object instead of null value. #### Expected Output 0.25.3 used to produce this: ```python pd.Series([0,1,None,3], dtype="Int64").to_json() >> # '{"0":0,"1":1,"2":null,"3":3}' ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.7.6.final.0 python-bits : 64 OS : Darwin OS-release : 19.2.0 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : None LOCALE : None.UTF-8 pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.0 pip : 20.0.2 setuptools : 45.2.0.post20200209 Cython : None pytest : 5.3.5 hypothesis : None sphinx : 2.4.3 blosc : None feather : None xlsxwriter : None lxml.etree : 4.4.1 html5lib : None pymysql : None psycopg2 : None jinja2 : 2.11.1 IPython : 7.12.0 pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : 4.4.1 matplotlib : 3.1.3 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : 0.16.0 pytables : None pytest : 5.3.5 pyxlsb : None s3fs : None scipy : 1.4.1 sqlalchemy : None tables : None tabulate : None xarray : None xlrd : 1.2.0 xlwt : None xlsxwriter : None numba : 0.48.0 </details>
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577,114,985
MDExOlB1bGxSZXF1ZXN0Mzg0OTcxNzUw
32,501
Disallow lossy SparseArray conversion
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3
2020-03-06T18:58:19Z
2020-03-14T16:47:12Z
2020-03-14T16:33:20Z
MEMBER
null
cc @TomAugspurger
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577,139,626
MDU6SXNzdWU1NzcxMzk2MjY=
32,502
DOC: `ref` issues in the contributing.rst file
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2
2020-03-06T19:46:26Z
2020-03-06T20:38:15Z
2020-03-06T20:38:15Z
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#### Problem description Anytime I click on an internal reference link on the [Contributing.rst](https://github.com/pandas-dev/pandas/blob/master/doc/source/development/contributing.rst) file, I expect to be directed somewhere in the internal documentation that explains something about the internal link. While it generates a `#id39` tag at the end of the link, it doesn't direct me to the page. I suspect that this is not typical behavior. I just want to make sure this is the case before I post a PR on it.
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32,503
core.common.random_state is too strict for state input
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1
2020-03-06T20:48:17Z
2020-03-17T02:38:04Z
2020-03-17T02:38:04Z
CONTRIBUTOR
null
The numpy RandomState seed can be an int, array-like, or BitGenerator ```python seed : {None, int, array_like, BitGenerator}, optional Random seed used to initialize the pseudo-random number generator or an instantized BitGenerator. If an integer or array, used as a seed for the MT19937 BitGenerator. Values can be any integer between 0 and 2**32 - 1 inclusive, an array (or other sequence) of such integers, or ``None`` (the default). If `seed` is ``None``, then the `MT19937` BitGenerator is initialized by reading data from ``/dev/urandom`` (or the Windows analogue) if available or seed from the clock otherwise. ``` Right now, we only pass through integers. Arrays (and BitGenerators if possible) should be passed through to RandomState at https://github.com/pandas-dev/pandas/blob/54c5e9e6e0819f848a10045d1cbc8ee936ffd075/pandas/core/common.py#L409-L410. ## Current Behavior ```pytb In [1]: import pandas as pd In [2]: import numpy as np In [3]: state_data = np.random.randint(0, 2**31, size=624, dtype='uint32') In [4]: pd.core.common.random_state(state_data) --------------------------------------------------------------------------- ValueError Traceback (most recent call last) <ipython-input-4-4f97e41a5899> in <module> ----> 1 pd.core.common.random_state(state_data) ~/sandbox/pandas/pandas/core/common.py in random_state(state) 415 else: 416 raise ValueError( --> 417 "random_state must be an integer, a numpy RandomState, or None" 418 ) 419 ValueError: random_state must be an integer, a numpy RandomState, or None ``` ## Expected Output ```python Out[4]: RandomState(MT19937) at 0x115B16050 ```
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CLN: avoid values_from_object in construction
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CLN: avoid values_from_object in Index.equals
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2020-03-06T21:26:37Z
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(wip) BUG: groupby with sort=False create buggy multiindex
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- [ ] closes #32259 - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Still messy, just running this through the test suite as my laptop's not great (but please let me know if such behaviour is unwelcome and I won't do it again) pandas/tests/groupby/test_timegrouper.py pandas/tests/groupby/test_grouping.py pandas/tests/groupby/test_categorical.py pandas/tests/groupby/test_groupby.py pandas/tests/test_multilevel.py
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CLN: Avoid bare pytest.raises in computation/test_eval.py
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2020-03-06T23:31:35Z
2020-03-11T09:09:06Z
2020-03-10T23:07:48Z
CONTRIBUTOR
null
* [x] ref #30999 * [x] tests added / passed * [x] passes `black pandas` * [x] passes `git diff origin/master -u -- "*.py" | flake8 --diff`
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CLN: avoid values_from_object in nanops
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2020-03-06T23:40:32Z
2020-03-16T15:03:06Z
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MEMBER
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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577,257,234
MDExOlB1bGxSZXF1ZXN0Mzg1MDg3ODgw
32,509
CLN: unused code in reshape.merge
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1
2020-03-07T01:56:29Z
2020-03-10T15:01:00Z
2020-03-10T11:48:33Z
MEMBER
null
check_duplicates is always passed as False, so we can trim some code
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577,266,075
MDExOlB1bGxSZXF1ZXN0Mzg1MDk0OTgy
32,510
[BUG] Loosen random_state input restriction
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0
2020-03-07T02:57:25Z
2020-03-17T02:38:05Z
2020-03-17T02:38:05Z
CONTRIBUTOR
null
Alllow for array-like as well as BitGenerator inputs Addresses: GH32503 - [x] closes #32503 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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577,274,325
MDExOlB1bGxSZXF1ZXN0Mzg1MTAxMTIw
32,511
[BUG] Add int-array-like into random state
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2020-03-07T04:12:27Z
2020-03-11T00:36:34Z
2020-03-11T00:36:34Z
CONTRIBUTOR
null
- [x] closes #32503 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [] whatsnew entry
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577,278,283
MDExOlB1bGxSZXF1ZXN0Mzg1MTA0MDQ4
32,512
[BUG] add consistency to_numeric on empty list
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1
2020-03-07T04:52:51Z
2020-03-20T02:04:17Z
2020-03-16T02:30:10Z
CONTRIBUTOR
null
to_numeric should work similarly on empty lists for downcast=unsigned/float/integer Addresses: GH32493 - [x] closes #32493 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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577,278,286
MDExOlB1bGxSZXF1ZXN0Mzg1MTA0MDUw
32,513
CLN: remove check_series_type
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2020-03-07T04:52:54Z
2020-03-09T21:13:50Z
2020-03-08T16:13:46Z
MEMBER
null
Trying to clean up assert_series_equal and avoid usage of _internal_get_values; I'm finding that these functions are _weird_, and in particular categorical dtype handling is opaque
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TST: Seemingly non-deterministic order of value_counts
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null
1
2020-03-07T09:33:03Z
2020-05-22T03:42:29Z
null
CONTRIBUTOR
null
We had a flaky test for `test_value_counts` in `pandas/tests/base/test_ops.py` which was related to the sort order of entries with the same count. A hotfix was introduced in #32449 and resolves the CI issue. The underlying issue still isn't fixed/confirmed. The test assumes that in case of same counts the order of the original index/series object is preserved. This assumption breaks on CI though. Please refer to [my comment](https://github.com/pandas-dev/pandas/pull/32449#discussion_r388388353) (and the following ones) for all related details I have found so far. It doesn't necessarily seem to be related to the narrow dtypes. It's probably just more likely that values are duplicated the narrower the dtype is.
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df.to_dict() accepts orient which are not in the list of options
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11
2020-03-07T12:07:45Z
2020-12-12T17:59:19Z
2020-03-14T21:33:06Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd df = pd.DataFrame( {'name': ['alice', 'bob'], 'age': [30, 28]}) df.to_dict(orient='racoon') ``` returns: ```python [{'age': 30, 'name': 'alice'}, {'age': 28, 'name': 'bob'}] ``` instead of `ValueError` #### Problem description The current version of pandas accepts orient= any word which starts with r, l, s, sp, i and d instead of just the actual options in the documentation. The function should be returning `ValueError` if the orient option is not any of the following: `{'dict', 'list', 'series', 'split', 'records', 'index'}`. Not fixing this might lead to mistakes by using an orient which might point to a wrong output. I would not consider this a bug but this should be consistent with other methods such as `df.to_json()`. The part of the code which needs to be fixed in master is: ```python if orient.lower().startswith("d"): return into_c((k, v.to_dict(into)) for k, v in self.items()) elif orient.lower().startswith("l"): return into_c((k, v.tolist()) for k, v in self.items()) elif orient.lower().startswith("sp"): return into_c( ( ("index", self.index.tolist()), ("columns", self.columns.tolist()), ( "data", [ list(map(com.maybe_box_datetimelike, t)) for t in self.itertuples(index=False, name=None) ], ), ) ) elif orient.lower().startswith("s"): return into_c((k, com.maybe_box_datetimelike(v)) for k, v in self.items()) elif orient.lower().startswith("r"): columns = self.columns.tolist() rows = ( dict(zip(columns, row)) for row in self.itertuples(index=False, name=None) ) return [ into_c((k, com.maybe_box_datetimelike(v)) for k, v in row.items()) for row in rows ] elif orient.lower().startswith("i"): if not self.index.is_unique: raise ValueError("DataFrame index must be unique for orient='index'.") return into_c( (t[0], dict(zip(self.columns, t[1:]))) for t in self.itertuples(name=None) ) else: raise ValueError(f"orient '{orient}' not understood") ``` by replacing the `.lower().startswith()` with ` ==` and the corresponding string I with now open a PR to fix the issue. *THE BUG IS STILL IN MASTER* [this should explain **why** the current behaviour is a problem and why the expected output is a better solution.] **Note**: We receive a lot of issues on our GitHub tracker, so it is very possible that your issue has been posted before. Please check first before submitting so that we do not have to handle and close duplicates! **Note**: Many problems can be resolved by simply upgrading `pandas` to the latest version. Before submitting, please check if that solution works for you. If possible, you may want to check if `master` addresses this issue, but that is not necessary. For documentation-related issues, you can check the latest versions of the docs on `master` here: https://pandas-docs.github.io/pandas-docs-travis/ If the issue has not been resolved there, go ahead and file it in the issue tracker. #### Expected Output #### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] INSTALLED VERSIONS ------------------ commit: None python: 3.5.2.final.0 python-bits: 64 OS: Linux OS-release: 4.15.0-88-generic machine: x86_64 processor: x86_64 byteorder: little LC_ALL: None LANG: en_GB.UTF-8 LOCALE: en_GB.UTF-8 pandas: 0.24.2 pytest: None pip: 19.3.1 setuptools: 41.6.0 Cython: None numpy: 1.17.4 scipy: None pyarrow: None xarray: None IPython: 7.9.0 sphinx: None patsy: None dateutil: 2.8.1 pytz: 2019.3 blosc: None bottleneck: None tables: None numexpr: None feather: None matplotlib: None openpyxl: None xlrd: None xlwt: None xlsxwriter: None lxml.etree: None bs4: None html5lib: None sqlalchemy: 1.3.11 pymysql: 0.9.3 psycopg2: None jinja2: 2.10.3 s3fs: None fastparquet: None pandas_gbq: None pandas_datareader: None gcsfs: None </details>
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32,516
Deprecate Aliases as orient Argument in DataFrame.to_dict
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11
2020-03-07T12:53:26Z
2020-06-01T14:52:06Z
2020-03-14T21:33:06Z
CONTRIBUTOR
null
- [ x] closes #32515 - [x ] tests added / passed - [x ] passes `black pandas` - [x ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x ] whatsnew entry
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