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MDU6SXNzdWU1NTkwODc1MTY=
31,615
pd.NA is converted to {} instead of null with pd.DataFrame.to_json
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3
2020-02-03T13:34:48Z
2020-02-08T08:11:59Z
2020-02-08T08:11:34Z
NONE
null
#### Code Sample ```python import numpy as np import pandas as pd pd.DataFrame([[np.nan]], columns=["NA"]).to_json(orient="records") # '[{"NA":null}]' pd.DataFrame([[None]], columns=["NA"]).to_json(orient="records") # '[{"NA":null}]' pd.DataFrame([[pd.NA]], columns=["NA"]).to_json(orient="records") # '[{"NA":{}}]' ``` #### Problem Description `pd.NA` should behave as `np.nan` and `None` when converting a DataFrame to JSON. #### Expected Output In the resulting JSON the `pd.NA` instances should be converted to JSON's `null`.
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559,110,719
MDExOlB1bGxSZXF1ZXN0MzcwMzQwNzUy
31,616
REGR: Fixed AssertionError in groupby
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11
2020-02-03T14:13:46Z
2020-02-05T14:56:00Z
2020-02-05T14:55:26Z
CONTRIBUTOR
null
Closes https://github.com/pandas-dev/pandas/issues/31522 cc @jbrockmendel. Just raising a `TypeError` when that assert failed didn't work. The `finally` still runs, which raised an assertion error. It seemed easier to try to just support this case. IIUC, it only occurs when an `(P, n_rows)` input block gets split into `P` result blocks. I believe that 1. The result blocks should all have the same dtype 2. The input block must not have been an extension block, since it's 2d So it *should* be safe to just cast the result values into an ndarray. Hopefully... Are there any edge cases I'm not considering? Some kind of `agg` that returns a result that can't be put in a 2D block? Even something like `.agg(lambda x: pd.Period())` won't hit this, since it has to be a Cython function.
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Backport PR #31607: DOC: combine regressions in section in v1.0.1 whatsnew
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1
2020-02-03T14:31:50Z
2020-02-03T19:39:37Z
2020-02-03T17:31:54Z
MEMBER
null
Backport https://github.com/pandas-dev/pandas/pull/31607
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Backport PR #31515 on branch 1.0.x (REGR: DataFrame.__setitem__(slice, val) is positional )
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0
2020-02-03T14:38:48Z
2020-02-03T15:39:57Z
2020-02-03T15:39:57Z
NONE
null
Backport PR #31515: REGR: DataFrame.__setitem__(slice, val) is positional
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Backport PR #31521: REGR: Fixed slicing DatetimeIndex with date
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1
2020-02-03T14:41:32Z
2020-02-03T15:39:45Z
2020-02-03T15:25:54Z
MEMBER
null
backport https://github.com/pandas-dev/pandas/pull/31521
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559,140,740
MDU6SXNzdWU1NTkxNDA3NDA=
31,620
Does #28827 also apply to applymap?
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3
2020-02-03T15:02:57Z
2020-06-02T21:04:15Z
2020-06-02T21:04:15Z
MEMBER
null
In #28854, the note > In the current implementation applymap calls func twice on the first column/row to decide whether it can take a fast or slow code path. This can lead to unexpected behavior if func has side-effects, as they will take effect twice for the first column/row. was removed from the `DataFrame.apply` docstring. However, it is still in the [docstring](https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.applymap.html?highlight=applymap#pandas.DataFrame.applymap) of `DataFrame.applymap`. Does it need to be removed there too? EDIT ---- As far as I can tell, this behaviour (calling the function twice to decide which path to take) still happens for `groupby.apply` and is what a user was asking about in #31111. Does it need to be documented in Groupby.Apply? Do end-users need to know about such internals?
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559,141,344
MDExOlB1bGxSZXF1ZXN0MzcwMzY1MzUx
31,621
TST: add regression test for apply case from GH-31605
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1
2020-02-03T15:03:58Z
2020-02-05T06:28:31Z
2020-02-05T01:26:33Z
MEMBER
null
@jorisvandenbossche you wanted to put more tests in for this issue. I put the user reported code example into a test. Did you have anything else in mind? I didn't merge it with the above one since the above acted on an empty Dataframe. - [x] closes #31605 - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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559,143,448
MDExOlB1bGxSZXF1ZXN0MzcwMzY3MDg4
31,622
DOC: add redirect for moved json_normalize docstring
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0
2020-02-03T15:07:27Z
2020-02-03T19:39:29Z
2020-02-03T19:39:23Z
MEMBER
null
Closes https://github.com/pandas-dev/pandas/issues/31514
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559,145,485
MDU6SXNzdWU1NTkxNDU0ODU=
31,623
REGR: AssertionError when subtracting Timestamp-valued DataFrames with non-indentical column index
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8
2020-02-03T15:10:53Z
2020-02-19T00:26:28Z
2020-02-19T00:26:28Z
NONE
null
```python import pandas as pd df = pd.DataFrame( { "foo": [pd.Timestamp("2019"), pd.Timestamp("2020")], "bar": [pd.Timestamp("2018"), pd.Timestamp("2021")], } ) df2 = df[["foo"]] print(df - df2) ``` #### Problem description The above snippet raises the following exception: ``` Traceback (most recent call last): File ".venv/lib/python3.6/site-packages/pandas/core/ops/array_ops.py", line 149, in na_arithmetic_op result = expressions.evaluate(op, str_rep, left, right) File ".v env/lib/python3.6/site-packages/pandas/core/computation/expressions.py", line 208, in evaluate return _evaluate(op, op_str, a, b) File ".venv/lib/python3.6/site-packages/pandas/core/computation/expressions.py", line 70, in _evaluate_standard return op(a, b) File ".venv/lib/python3.6/site-packages/pandas/core/ops/common.py", line 64, in new_method return method(self, other) File ".venv/lib/python3.6/site-packages/pandas/core/ops/__init__.py", line 500, in wrapper result = arithmetic_op(lvalues, rvalues, op, str_rep) File ".venv/lib/python3.6/site-packages/pandas/core/ops/array_ops.py", line 192, in arithmetic_op res_values = dispatch_to_extension_op(op, lvalues, rvalues) File ".venv/lib/python3.6/site-packages/pandas/core/ops/dispatch.py", line 125, in dispatch_to_extension_op res_values = op(left, right) File ".venv/lib/python3.6/site-packages/pandas/core/arrays/datetimelike.py", line 1390, in __rsub__ f"cannot subtract {type(self).__name__} from {type(other).__name__}" TypeError: cannot subtract DatetimeArray from ndarray During handling of the above exception, another exception occurred: Traceback (most recent call last): File "pandas_bug.py", line 36, in <module> print(df2 - df) File ".venv/lib/python3.6/site-packages/pandas/core/ops/__init__.py", line 703, in f new_data = left._combine_frame(right, pass_op, fill_value) File ".venv/lib/python3.6/site-packages/pandas/core/frame.py", line 5297, in _combine_frame new_data = ops.dispatch_to_series(self, other, _arith_op) File ".venv/lib/python3.6/site-packages/pandas/core/ops/__init__.py", line 416, in dispatch_to_series new_data = expressions.evaluate(column_op, str_rep, left, right) File ".venv/lib/python3.6/site-packages/pandas/core/computation/expressions.py", line 208, in evaluate return _evaluate(op, op_str, a, b) File ".venv/lib/python3.6/site-packages/pandas/core/computation/expressions.py", line 70, in _evaluate_standard return op(a, b) File ".venv/lib/python3.6/site-packages/pandas/core/ops/__init__.py", line 385, in column_op return {i: func(a.iloc[:, i], b.iloc[:, i]) for i in range(len(a.columns))} File ".venv/lib/python3.6/site-packages/pandas/core/ops/__init__.py", line 385, in <dictcomp> return {i: func(a.iloc[:, i], b.iloc[:, i]) for i in range(len(a.columns))} File ".venv/lib/python3.6/site-packages/pandas/core/ops/array_ops.py", line 121, in na_op return na_arithmetic_op(x, y, op, str_rep) File ".venv/lib/python3.6/site-packages/pandas/core/ops/array_ops.py", line 151, in na_arithmetic_op result = masked_arith_op(left, right, op) File ".venv/lib/python3.6/site-packages/pandas/core/ops/array_ops.py", line 75, in masked_arith_op assert isinstance(x, np.ndarray), type(x) ``` This is a 1.0.0 regression; in 0.25.3, the operation succeeds and the unmatched `bar` column is filled with `NaN` in the output. The same error occurs with: * Any combination of incompatible columns (strict subset, strict superset, overlapping, disjoint) * Calling the `subtract` method instead of using the subtraction operator * Timezone-aware `Timestamp`s as well as timezone-naive It does *not* seem to occur with: * Mismatches on the row index; transposing the dataframes in the above example prevents the errors occuring. * `pd.Series` objects with mismatched indexes (e.g. calling the above on the first row of each dataframe works fine) * Other dtypes; `bool`, `float`, and `int` seem to work fine. Similarly, if the dataframes are explicitly cast to dtype `object`, the operation succeeds. #### Expected Output ``` bar foo 0 NaN 0 days 1 NaN 0 days ``` #### Output of ``pd.show_versions()`` <details> ``` INSTALLED VERSIONS ------------------ commit : None python : 3.6.8.final.0 python-bits : 64 OS : Linux OS-release : 4.15.0-74-generic machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_GB.UTF-8 LOCALE : en_GB.UTF-8 pandas : 1.0.0 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 19.3.1 setuptools : 41.6.0 Cython : None pytest : 5.3.5 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 : 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 : None ``` </details>
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559,200,338
MDExOlB1bGxSZXF1ZXN0MzcwNDEzMzUx
31,624
DOC: link on nullables in indexing
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2
2020-02-03T16:40:44Z
2020-02-26T20:23:11Z
2020-02-26T20:23:10Z
NONE
null
DOC: Mention that boolean indexing is impossible for new nullable integer/boolean and string data types when they contain missing values closes #31537
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559,215,337
MDExOlB1bGxSZXF1ZXN0MzcwNDI1NjE5
31,625
CLN: inline indexing 1-liners
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3
2020-02-03T17:07:27Z
2020-02-06T23:45:59Z
2020-02-06T23:43:04Z
MEMBER
null
The only 2-liners here are _convert_scalar_indexer and _convert_slice_indexer, which are effectively `axis = min(axis, self.ndim-1)`, but that is unnecessary since all places where these are called have axis < self.ndim.
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MDExOlB1bGxSZXF1ZXN0MzcwNDMyNDI5
31,626
BUG: qcut can fail for highly discontinuous data distributions
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10
2020-02-03T17:23:26Z
2020-06-14T15:44:48Z
2020-06-14T15:44:48Z
NONE
null
Fixes #15069. Needs refactoring - [x] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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31,627
Replace .format with f-strings
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2020-02-03T17:47:03Z
2020-02-04T18:33:15Z
2020-02-04T18:33:15Z
CONTRIBUTOR
null
- [ ] solves few cases of #29547
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replacing .format with f-strings
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2020-02-03T17:56:20Z
2020-02-03T23:46:37Z
2020-02-03T23:46:29Z
CONTRIBUTOR
null
fixing some styling (using f-strings instead of .format)
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31,629
Backport PR #31622 on branch 1.0.x (DOC: add redirect for moved json_normalize docstring)
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2020-02-03T19:39:53Z
2020-02-04T07:27:29Z
2020-02-04T07:27:29Z
NONE
null
Backport PR #31622: DOC: add redirect for moved json_normalize docstring
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MEMBER
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- [ ] closes #xxxx - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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2020-02-03T20:37:44Z
2020-02-03T23:26:28Z
2020-02-03T23:20:27Z
CONTRIBUTOR
null
Closes https://github.com/pandas-dev/pandas/issues/31449
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CONTRIBUTOR
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#### Code Sample, a copy-pastable example if possible ```pytb In [1]: import pandas as pd In [2]: s = pd.Series(['a', None], dtype="string") In [3]: s.str.repeat([1, 2]) --------------------------------------------------------------------------- TypeError Traceback (most recent call last) ~/sandbox/pandas/pandas/core/strings.py in rep(x, r) 781 try: --> 782 return bytes.__mul__(x, r) 783 except TypeError: TypeError: descriptor '__mul__' requires a 'bytes' object but received a 'NAType' During handling of the above exception, another exception occurred: TypeError Traceback (most recent call last) <ipython-input-3-a01827562f7a> in <module> ----> 1 s.str.repeat([1, 2]) ~/sandbox/pandas/pandas/core/strings.py in wrapper(self, *args, **kwargs) 1950 ) 1951 raise TypeError(msg) -> 1952 return func(self, *args, **kwargs) 1953 1954 wrapper.__name__ = func_name ~/sandbox/pandas/pandas/core/strings.py in repeat(self, repeats) 2780 @forbid_nonstring_types(["bytes"]) 2781 def repeat(self, repeats): -> 2782 result = str_repeat(self._parent, repeats) 2783 return self._wrap_result(result) 2784 ~/sandbox/pandas/pandas/core/strings.py in str_repeat(arr, repeats) 785 786 repeats = np.asarray(repeats, dtype=object) --> 787 result = libops.vec_binop(com.values_from_object(arr), repeats, rep) 788 return result 789 ~/sandbox/pandas/pandas/_libs/ops.pyx in pandas._libs.ops.vec_binop() 239 result[i] = y 240 else: --> 241 raise 242 243 return maybe_convert_bool(result.base) # `.base` to access np.ndarray ~/sandbox/pandas/pandas/_libs/ops.pyx in pandas._libs.ops.vec_binop() 232 y = right[i] 233 try: --> 234 result[i] = op(x, y) 235 except TypeError: 236 if x is None or is_nan(x): ~/sandbox/pandas/pandas/core/strings.py in rep(x, r) 782 return bytes.__mul__(x, r) 783 except TypeError: --> 784 return str.__mul__(x, r) 785 786 repeats = np.asarray(repeats, dtype=object) TypeError: descriptor '__mul__' requires a 'str' object but received a 'NAType' ``` #### Problem description The `str_repeat` method correctly handles NA values when `repeats` is a scalar, but fails when its a sequence. #### Expected Output ```python 0 a 1 <NA> dtype: string ```
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MDU6SXNzdWU1NTkzNjE0NDA=
31,633
replace() involving booleans affects integers and floats equal to 0 and 1
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2020-02-03T22:03:19Z
2021-07-27T05:47:02Z
null
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#### Code Sample ```python Series([0, 1, 2, True]).replace({0: 'a', True: 'x', False: 'y'}) ``` Output: | | 0 | |---:|:----| | 0 | y | | 1 | x | | 2 | 2 | | 3 | x | #### Problem description I expected zero to be replaced with 'a', and 1 to remain untouched. - documentation does not clarify whether `replace()` checks for equality or for identity. - both inexperienced and experienced users may fall in the trap of the code as shown above; if the current behaviour is desired, would it be reasonable to add a warning when the user's attempts can lead to certainly unintended results (as above)? #### Expected Output | | 0 | |---:|:----| | 0 | a | | 1 | 1 | | 2 | 2 | | 3 | x | #### Due research Stack Overflow: - [How to map True and False to 'Yes' and 'No' in a pandas data frame for columns of dtype bool only?](https://stackoverflow.com/questions/45196626/how-to-map-true-and-false-to-yes-and-no-in-a-pandas-data-frame-for-columns-o) (6k views, 6/8 upvotes) works around this problem by only using booleans in columns with `dtype == bool` - [I wonder when replace 0 on a Series(or dataframe), will False also be replaced?](https://stackoverflow.com/questions/52128402/i-wonder-when-replace-0-on-a-seriesor-dataframe-will-false-also-be-replaced/52128984#52128984) demonstrates that replacing zeros will not touch booleans if the `dtype == bool`. - I verified that my problem exists with `dtype in {int, float}` (i.e. after removing `True` from Series) #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.8.0.final.0 python-bits : 64 OS : Linux OS-release : 5.3.0-26-generic machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_GB.UTF-8 LOCALE : en_GB.UTF-8 pandas : 1.0.0 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.0 pip : 19.3.1 setuptools : 41.2.0 Cython : None pytest : 5.2.1 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : 7.8.0 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 : 5.2.1 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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31,634
regression: ts64->int64
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2020-02-03T22:33:52Z
2021-06-08T16:48:40Z
2021-06-08T16:48:40Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python !pip install pandas==1.0.0 import datetime import pandas as pd pd.Series([datetime.datetime.now(), datetime.datetime.now(), None]).astype('int64') ``` => ``` ValueError: Cannot convert NaT values to integer ``` #### Problem description In 0.25.*, the above ran without an exception, while in 1.0.0, it now throws an exception. While the new behavior may be OK, it would be better as first a deprecation warning with a suggested migration. (We had the same code for at least 1-2 years w/out issue. Still unclear on the proper fix for getting the int64 or int32 epoch out in a way that is friendly for both pre/post 1.0.0.) #### Expected Output Same behavior as 0.25.*: ``` 0 1580769049934654000 1 1580769049934659000 2 -9223372036854775808 dtype: int64 ``` #### Output of ``pd.show_versions()`` <details> /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 : 1.0.0 numpy : 1.17.5 pytz : 2018.9 dateutil : 2.6.1 pip : 19.3.1 setuptools : 45.1.0 Cython : 0.29.14 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 : 3.1.2 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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REF: implement ExtensionIndex._concat_same_dtype, use for IntervalIndex
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CLN: Unreachable branch in Loc._getitem_iterable
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31,637
Backport PR #31631 on branch 1.0.x (REGR: Fixed setitem with MultiIndex)
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0
2020-02-03T23:20:38Z
2020-02-04T07:28:01Z
2020-02-04T07:28:01Z
NONE
null
Backport PR #31631: REGR: Fixed setitem with MultiIndex
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31,638
REF: call _maybe_cast_indexer upfront, better exception messages
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1
2020-02-04T01:58:07Z
2020-02-05T01:18:18Z
2020-02-05T01:13:11Z
MEMBER
null
This will actually allow us to remove e.g. CategoricalIndex.get_loc by moving the 2 relevant lines into CategoricalIndex._maybe_cast_indexer. Large parts of DTI/TDI/PI.get_loc will also be simplifiable. We've got both Index._maybe_cast_indexer and Index._convert_scalar_indexer which hopefully we'll only need one of.
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CLN: Replace format with f-strings in test_repr_info
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1
2020-02-04T02:02:09Z
2020-02-05T01:12:15Z
2020-02-05T01:12:09Z
CONTRIBUTOR
null
Updated `pandas/tests/frame/test_repr_info.py` to use f-strings ref: https://github.com/pandas-dev/pandas/issues/29547 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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CLN: prelims for MultiIndex.get_value
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3
2020-02-04T02:08:12Z
2020-02-06T17:22:57Z
2020-02-06T17:22:52Z
MEMBER
null
Unravelling MultiIndex.get_value and get_loc is shaping up to be a PITA. This separates out the easiest parts of the get_value cleanup. @TomAugspurger can you confirm that the change made here to the `__finalize__` call is correct? If so, suggest a test?
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DOC: Removed numeric_only parameter from pd.DataFrame.mad docs
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11
2020-02-04T02:45:15Z
2020-05-15T08:47:48Z
2020-02-09T17:19:45Z
CONTRIBUTOR
null
- closes #29079
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31,642
DOC: Fix typo in Getting Started docs
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1
2020-02-04T04:55:42Z
2020-02-04T11:20:10Z
2020-02-04T11:20:00Z
CONTRIBUTOR
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559,488,902
MDU6SXNzdWU1NTk0ODg5MDI=
31,643
BUG: pandas.cut does not give the right answer with nullable integer Series input
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2020-02-04T05:00:20Z
2020-02-05T02:56:09Z
2020-02-05T02:56:08Z
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#### Code Sample, a copy-pastable example if possible ```python import numpy import pandas input_array = numpy.array([1, 2, numpy.nan, 4, 5]) print('Input array: %s\n' % input_array) bins = numpy.array([0.5, 2.5, 4.5, 6.5]) print ('Using bins: %s\n' % bins) test_series = pandas.Series(input_array).astype('Int64') print('Test series:\n\n%s\n' % test_series) print('Results of cut:\n\n%s\n'% pandas.cut(test_series, bins)) ``` Console output: ```` Input array: [ 1. 2. nan 4. 5.] Using bins: [0.5 2.5 4.5 6.5] Test series: 0 1 1 2 2 NaN 3 4 4 5 dtype: Int64 Results of cut: 0 (0.5, 2.5] 1 (0.5, 2.5] 2 NaN 3 (0.5, 2.5] 4 (4.5, 6.5] dtype: category Categories (3, interval[float64]): [(0.5, 2.5] < (2.5, 4.5] < (4.5, 6.5]] ```` #### Problem description `output[3]` should be `(2.5, 4.5]` and not `(0.5, 2.5]` as shown. Tested in pandas 1.0.0 and 0.25.3. #### Expected Output ```` Input array: [ 1. 2. nan 4. 5.] Using bins: [0.5 2.5 4.5 6.5] Test series: 0 1 1 2 2 NaN 3 4 4 5 dtype: Int64 Results of cut: 0 (0.5, 2.5] 1 (0.5, 2.5] 2 NaN 3 (2.5, 4.5] 4 (4.5, 6.5] dtype: category Categories (3, interval[float64]): [(0.5, 2.5] < (2.5, 4.5] < (4.5, 6.5]] ```` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.6.10.final.0 python-bits : 64 OS : Linux OS-release : 4.4.0-173-generic machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.0.0 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.6.1 pip : 20.0.2 setuptools : 40.6.3 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 : 7.11.1 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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559,549,529
MDU6SXNzdWU1NTk1NDk1Mjk=
31,644
replace method does't work with string type Series
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17
2020-02-04T08:02:13Z
2021-07-27T14:56:29Z
null
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python >>>pd.Series(['A','B']).replace(r'.','C',regex=True) 0 C 1 C dtype: object pd.Series(['A','B']).astype('string').replace(r'.','C',regex=True) 0 A 1 B dtype: string ``` #### Problem description It seems that replace doesn't work with the string type Series. Why these two codes return different results?
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559,563,806
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31,645
DOC: extending pandas page is not rendered correctly
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2020-02-04T08:35:33Z
2020-02-04T12:23:45Z
2020-02-04T12:20:23Z
MEMBER
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https://pandas.pydata.org/pandas-docs/stable/development/extending.html this is the first result gotten by googling extending pandas, however, seems not rendered correctly, help is welcome!
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31,646
IntervalArray equality with wrong length Iterable raises TypeError
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2020-02-04T09:30:09Z
2021-07-27T05:49:08Z
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MEMBER
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#### Code Sample, a copy-pastable example if possible ```python >>> import pandas as pd >>> pd.__version__ '1.1.0.dev0+288.gac61a8a62' >>> pd.core.arrays.IntervalArray.from_breaks([1, 2, 3, 4]) == (i for i in range(10)) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "C:\Users\simon\pandas\pandas\core\arrays\interval.py", line 562, in __eq__ if len(self) != len(other): TypeError: object of type 'generator' has no len() >>> ``` #### Problem description Raises TypeError mypy gives `pandas\core\arrays\interval.py:563: error: Argument 1 to "len" has incompatible type "object"; expected "Sized"` similar problem with IntegerArray ```python Traceback (most recent call last): File "<stdin>", line 1, in <module> File "C:\Users\simon\pandas\pandas\core\ops\common.py", line 64, in new_method return method(self, other) File "C:\Users\simon\pandas\pandas\core\arrays\integer.py", line 531, in cmp_method if len(self) != len(other): TypeError: len() of unsized object >>> ``` and other Extension Arrays. #### Expected Output Not to raise TypeError I think returning ``` <BooleanArray> [False, False, False] Length: 3, dtype: boolean ``` would be consistent with numpy array ```python >>> import numpy as np >>> np.array([1, 2, 3]) == (i for i in range(10)) array([False, False, False]) ``` and Series ```python >>> pd.Series([1, 2, 3]) == (i for i in range(10)) 0 False 1 False 2 False dtype: bool >>> ``` #### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] </details>
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31,647
DOC: clean up DataFrame.ewm
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null
8
2020-02-04T11:08:50Z
2020-03-12T10:22:03Z
2020-03-12T10:22:03Z
MEMBER
null
A few issues I've noticed: 1) It says > When adjust is False, weighted averages are calculated recursively as: > > weighted_average[0] = arg[0]; weighted_average[i] = (1-alpha)*weighted_average[i-1] + alpha*arg[i]. > but `arg` isn't defined 2) The phrase "When adjust is False, weighted averages are calculated recursively as:" appears as bold, but I don't think this was the intention 3) ``` \text{for} halflife > 0 ``` should be ``` \text{for } halflife > 0 ``` 4) In the "notes" section, ```alpha``` is used, while in the description of the parameters, it's ``` :math:`\alpha` ``` 5) The respective doc for Series could be updated, as it says ``` axis{0 or ‘index’, 1 or ‘columns’}, default 0 ```
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559,747,188
MDU6SXNzdWU1NTk3NDcxODg=
31,648
PERF: Indexing a multi-index is a lot slower
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7
2020-02-04T14:15:01Z
2020-02-04T19:26:00Z
2020-02-04T19:26:00Z
NONE
null
Indexing a multi-index seemingly went from O(1) to O(N): ![bug](https://user-images.githubusercontent.com/123696/73701369-91a13c80-46a6-11ea-8335-6a8e7a3f7dca.png) I did a bisect, and found this was caused by the `_shallow_copy` here: https://github.com/pandas-dev/pandas/commit/b0f33b3f40d5742531e31aef90573b9592489592#diff-4ffd1c69d47e0ac9f2de4f9e3e4a118cR643. #### Code Sample ```python from time import perf_counter as time import pandas as pd for N in [1000, 2000, 4000, 8000, 16000, 32000]: values = list(range(N)) df = pd.DataFrame({ 'a': values }) df['b'] = 1 df.set_index(['a', 'b'], inplace = True) t = time() df.loc[values] t = time() - t print(N, t) ```
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559,752,450
MDU6SXNzdWU1NTk3NTI0NTA=
31,649
to_datetime returning numpy.datetime64
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3
2020-02-04T14:22:56Z
2020-02-05T00:22:03Z
2020-02-05T00:22:03Z
NONE
null
#### Code Sample, a copy-pastable example if possible This code: ```python >>> df = pd.DataFrame({'date': ['Aug2020', 'November 2020']}) >>> df['parsed'] = df['date'].apply(pd.to_datetime) >>> end = df.loc[df['parsed'].idxmax()] >>> end['parsed'].replace(day=2) Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: 'numpy.datetime64' object has no attribute 'replace' ``` worked in Pandas 0.25.3, but raises since 1.0.0. I think there might be an issue with unboxing values when there are mixed types in the dataframe: ```python >>> df = pd.DataFrame({'date': ['Aug2020', 'November 2020']}) >>> new = ( ... df ... .assign( ... parsed=lambda x: x['date'].apply(pd.to_datetime), ... parsed2 = lambda x: x['date'].apply(pd.to_datetime) ... ) ... ) >>> new['parsed'].iloc[0] Timestamp('2020-08-01 00:00:00') >>> new.iloc[0]['parsed'] numpy.datetime64('2020-08-01T00:00:00.000000000') # unboxed type >>> new2 = new.drop(columns=['date']) >>> new2['parsed'].iloc[0] Timestamp('2020-08-01 00:00:00') >>> new2.iloc[0]['parsed'] Timestamp('2020-08-01 00:00:00') # boxed type now that we've dropped the string column ``` #### Problem description to_datetime can "sometimes" result in a np.datetime64 return type. np.datetime64 is not a valid return type for to_datetime (https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.to_datetime.html), it should always be a datetimelike. #### Expected Output As in previous versions of Pandas: ```python >>> df = pd.DataFrame({'date': ['Aug2020', 'November 2020']}) >>> df['parsed'] = df['date'].apply(pd.to_datetime) >>> end = df.loc[df['parsed'].idxmax()] >>> end['parsed'].replace(day=2) Timestamp('2020-11-02 00:00:00') ``` #### Output of ``pd.show_versions()`` <details> >>> pd.show_versions() 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 : en_GB.UTF-8 LOCALE : None.None pandas : 1.0.0 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 19.3.1 setuptools : 41.2.0 Cython : 0.29.14 pytest : 5.3.5 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : 4.5.0 html5lib : None pymysql : None psycopg2 : 2.8.4 (dt dec pq3 ext lo64) jinja2 : 2.10.3 IPython : 7.11.1 pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : 4.5.0 matplotlib : 3.1.3 numexpr : None odfpy : None openpyxl : 3.0.0 pandas_gbq : None pyarrow : None 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 : None </details>
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31,650
figsize property not accepted for pandas.plotting.autocorrelation_plot - visualization
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2
2020-02-04T14:27:26Z
2021-07-27T05:49:30Z
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#### Code Sample, a copy-pastable example if possible ```python from pd.plotting import autocorrelation_plot # read a subset of sales data from rossman sales data into a DataFrame # set Date column to the index autocorrelation_plot(df_sales['Sales'], figsize=(10, 8)) ``` #### Problem description Plotting works fine without the `figsize` argument, but errors with it. Stack trace below. Other pandas.plotting charts accept a `figsize` argument. #### Expected Output ``` --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) <ipython-input-15-df3d57963679> in <module> ----> 1 auto_plot(df_sales['Sales'], figsize=(10, 8)) ~/miniconda3/envs/main/lib/python3.7/site-packages/pandas/plotting/_misc.py in autocorrelation_plot(series, ax, **kwargs) 418 """ 419 plot_backend = _get_plot_backend("matplotlib") --> 420 return plot_backend.autocorrelation_plot(series=series, ax=ax, **kwargs) 421 422 ~/miniconda3/envs/main/lib/python3.7/site-packages/pandas/plotting/_matplotlib/misc.py in autocorrelation_plot(series, ax, **kwds) 425 ax.set_xlabel("Lag") 426 ax.set_ylabel("Autocorrelation") --> 427 ax.plot(x, y, **kwds) 428 if "label" in kwds: 429 ax.legend() ~/miniconda3/envs/main/lib/python3.7/site-packages/matplotlib/__init__.py in inner(ax, *args, **kwargs) 1865 "the Matplotlib list!)" % (label_namer, func.__name__), 1866 RuntimeWarning, stacklevel=2) -> 1867 return func(ax, *args, **kwargs) 1868 1869 inner.__doc__ = _add_data_doc(inner.__doc__, ~/miniconda3/envs/main/lib/python3.7/site-packages/matplotlib/axes/_axes.py in plot(self, *args, **kwargs) 1526 kwargs = cbook.normalize_kwargs(kwargs, _alias_map) 1527 -> 1528 for line in self._get_lines(*args, **kwargs): 1529 self.add_line(line) 1530 lines.append(line) ~/miniconda3/envs/main/lib/python3.7/site-packages/matplotlib/axes/_base.py in _grab_next_args(self, *args, **kwargs) 404 this += args[0], 405 args = args[1:] --> 406 for seg in self._plot_args(this, kwargs): 407 yield seg 408 ~/miniconda3/envs/main/lib/python3.7/site-packages/matplotlib/axes/_base.py in _plot_args(self, tup, kwargs) 394 "with non-matching shapes is deprecated.") 395 for j in xrange(max(ncx, ncy)): --> 396 seg = func(x[:, j % ncx], y[:, j % ncy], kw, kwargs) 397 ret.append(seg) 398 return ret ~/miniconda3/envs/main/lib/python3.7/site-packages/matplotlib/axes/_base.py in _makeline(self, x, y, kw, kwargs) 298 default_dict = self._getdefaults(None, kw) 299 self._setdefaults(default_dict, kw) --> 300 seg = mlines.Line2D(x, y, **kw) 301 return seg 302 ~/miniconda3/envs/main/lib/python3.7/site-packages/matplotlib/lines.py in __init__(self, xdata, ydata, linewidth, linestyle, color, marker, markersize, markeredgewidth, markeredgecolor, markerfacecolor, markerfacecoloralt, fillstyle, antialiased, dash_capstyle, solid_capstyle, dash_joinstyle, solid_joinstyle, pickradius, drawstyle, markevery, **kwargs) 419 # update kwargs before updating data to give the caller a 420 # chance to init axes (and hence unit support) --> 421 self.update(kwargs) 422 self.pickradius = pickradius 423 self.ind_offset = 0 ~/miniconda3/envs/main/lib/python3.7/site-packages/matplotlib/artist.py in update(self, props) 886 try: 887 ret = [_update_property(self, k, v) --> 888 for k, v in props.items()] 889 finally: 890 self.eventson = store ~/miniconda3/envs/main/lib/python3.7/site-packages/matplotlib/artist.py in <listcomp>(.0) 886 try: 887 ret = [_update_property(self, k, v) --> 888 for k, v in props.items()] 889 finally: 890 self.eventson = store ~/miniconda3/envs/main/lib/python3.7/site-packages/matplotlib/artist.py in _update_property(self, k, v) 879 func = getattr(self, 'set_' + k, None) 880 if not callable(func): --> 881 raise AttributeError('Unknown property %s' % k) 882 return func(v) 883 AttributeError: Unknown property figsize ``` #### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] 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 : 1.0.0 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 45.1.0.post20200127 Cython : 0.29.14 pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : 4.4.1 html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : 7.11.1 pandas_datareader: None bs4 : 4.8.1 bottleneck : None fastparquet : None gcsfs : None lxml.etree : 4.4.1 matplotlib : 2.2.4 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pytest : None pyxlsb : None s3fs : None scipy : 1.3.1 sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : None </details>
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PERF: Cache MultiIndex.levels
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3
2020-02-04T15:00:02Z
2020-02-04T20:08:40Z
2020-02-04T19:26:00Z
CONTRIBUTOR
null
Closes https://github.com/pandas-dev/pandas/issues/31648. This should have been caught by the benchmark MultiIdnex.time_index_slice. Confirming that now..
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BUG: avoid specifying default coerce_timestamps in to_parquet
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4
2020-02-04T15:09:16Z
2020-10-03T05:07:49Z
2020-02-05T01:09:00Z
MEMBER
null
Looking into the usage question of https://github.com/pandas-dev/pandas/issues/31572, I noticed that specifying the version to allow writing nanoseconds to parquet worked in plain pyarrow code, but not with pandas' `to_parquet`. This is because we hardcode `coerce_timestamps="ms"` while the default is `None`, which has version-dependent behaviour (eg if version="2.0", actually write the nanosecond data)
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ENH: Timestamp constructor now raises more explanatory error message
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4
2020-02-04T15:33:34Z
2020-05-29T10:48:00Z
2020-02-26T02:19:00Z
MEMBER
null
Timestamp constructor now raises explanatory error message when year, month or day is missing - [x] closes #31200 - [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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31,654
Backport PR #31528 on branch 1.0.x (REGR: Categorical with np.str_ categories)
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0
2020-02-04T16:24:38Z
2020-02-04T19:25:21Z
2020-02-04T19:25:21Z
NONE
null
Backport PR #31528: REGR: Categorical with np.str_ categories
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559,835,113
MDExOlB1bGxSZXF1ZXN0MzcwOTMzMTIx
31,655
REF: call _convert_scalar_indexer upfront in Series.__getitem__
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2
2020-02-04T16:30:51Z
2020-02-05T02:47:04Z
2020-02-05T02:44:44Z
MEMBER
null
This simplifies a try/except block and moves us towards being able to tighten what we accept in _convert_scalar_indexer among others. I think we'll soon be able to get rid of the kludge on L866/868.
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31,656
Backport PR #31502 on branch 1.0.x (BUG: Fixed IntervalArray[int].shift)
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0
2020-02-04T16:56:19Z
2020-02-04T19:25:31Z
2020-02-04T19:25:30Z
NONE
null
Backport PR #31502: BUG: Fixed IntervalArray[int].shift
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31,657
https://pandas.pydata.org/pandas-docs/version/ gives a 403 Forbidden error.
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2
2020-02-04T17:21:49Z
2020-02-05T15:50:44Z
2020-02-05T15:50:44Z
NONE
null
On the pandas website at https://pandas.pydata.org/ if I click on the drop-down menu titled 'documentation' and then select 'older versions' I am taken to https://pandas.pydata.org/pandas-docs/version/ which gives a 403 Forbidden error.
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559,890,557
MDExOlB1bGxSZXF1ZXN0MzcwOTc4MTY2
31,658
API: allow step!=1 slice with IntervalIndex
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11
2020-02-04T18:08:44Z
2020-03-09T18:05:33Z
2020-03-08T16:11:22Z
MEMBER
null
- [ ] closes #xxxx - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry See discussion https://github.com/pandas-dev/pandas/pull/16386#discussion_r374807689 cc @jorisvandenbossche @jschendel
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check first and last points' labels are correct
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2
2020-02-04T18:11:52Z
2020-02-25T17:12:16Z
2020-02-05T01:02:58Z
MEMBER
null
- [ ] closes #31580 - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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559,905,526
MDExOlB1bGxSZXF1ZXN0MzcwOTkwMzQ1
31,660
Replaced .format with f- strings
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4
2020-02-04T18:39:33Z
2020-02-05T20:22:31Z
2020-02-05T01:00:29Z
CONTRIBUTOR
null
xref #29547 for - [ ] pandas/util/_print_versions.py - [ ] pandas/tests/tseries/frequencies/test_to_offset.py
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MDU6SXNzdWU1NTk5MTU2ODA=
31,661
DOC: See also missing links in GroupBy.apply(), GroupBy.pipe()
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6
2020-02-04T19:00:19Z
2020-02-05T03:08:08Z
null
CONTRIBUTOR
null
ERROR: type should be string, got "\r\nhttps://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.core.groupby.GroupBy.pipe.html#pandas.core.groupby.GroupBy.pipe\r\n\r\nhttps://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.core.groupby.GroupBy.pipe.html#pandas.core.groupby.GroupBy.apply\r\n\r\n#### Problem description\r\n\r\nGroupBy.apply() and GroupBy.pipe() have missing links in their See also section. Might be other missing links in other functions of GroupBy.\r\n\r\nSpecifically, the links that are not working are Series.apply, DataFrame.apply, Series.pipe, DataFrame.pipe\r\n\r\n#### Expected Output\r\n\r\nLinks should take you to named functions\r\n"
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559,916,954
MDExOlB1bGxSZXF1ZXN0MzcwOTk5NTg0
31,662
CLN: MultiIndex.get_value is a hive of scum and villainy
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0
2020-02-04T19:02:45Z
2020-02-05T01:07:52Z
2020-02-05T00:59:33Z
MEMBER
null
This will in turn allow for simplification for other code that has built up kludges around MultiIndex.get_value's behavior
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MDU6SXNzdWU1NTk5Mzk1NDk=
31,663
Documentation for divmod and rdivmod gives wrong return type
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8
2020-02-04T19:46:43Z
2020-02-12T01:39:07Z
2020-02-12T01:39:07Z
NONE
null
See https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.divmod.html#pandas.Series.divmod and https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.rdivmod.html#pandas.Series.rdivmod The documentation incorrectly says that the `divmod` and `rdivmod` returns Series. However, both methods actually return 2-tuples containing two series.
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Backport PR #31651: PERF: Cache MultiIndex.levels
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0
2020-02-04T20:04:26Z
2020-02-04T21:25:00Z
2020-02-04T21:24:44Z
CONTRIBUTOR
null
Manual backport for https://github.com/pandas-dev/pandas/pull/31651.
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2020-02-04T20:08:16Z
2020-02-04T21:25:04Z
2020-02-04T21:24:57Z
CONTRIBUTOR
null
(cherry picked from commit 103840e974a4c8548fccab86cabc6a3161bd94e8) Included in https://github.com/pandas-dev/pandas/pull/31664. So this won't need to be backported.
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31,666
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3
2020-02-04T20:26:39Z
2020-02-05T08:44:26Z
2020-02-05T00:22:03Z
MEMBER
null
- [x] closes #31649 - [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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BUG: fixes bug when using sep=None and comment keyword for read_csv
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4
2020-02-04T22:07:59Z
2020-03-03T03:02:28Z
2020-03-03T03:02:24Z
CONTRIBUTOR
null
- [x] closes #31396 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry - added
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2020-02-04T22:19:19Z
2020-02-05T13:23:23Z
2020-02-05T00:31:26Z
CONTRIBUTOR
null
Fixed by falling back to the wrapped Python version when the cython version raises NotImplementedError. Closes https://github.com/pandas-dev/pandas/issues/31450
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CLN: remove kwargs from signature of (Index|MultiIndex).copy
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2020-02-04T22:52:42Z
2020-02-12T21:48:50Z
2020-02-09T17:30:24Z
CONTRIBUTOR
null
Removes ``**kwargs`` from ``Index.copy`` and ``MultiIndex.copy``.
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groupby fails when MultiIndex contains Int64Index in an empty DataFrame in 1.0.0
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2020-02-04T22:53:05Z
2020-02-05T10:17:06Z
2020-02-05T10:17:06Z
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#### Code Sample, a copy-pastable example if possible ```python df = pd.DataFrame( [[123, "a", 1.0], [123, "b", 2.0]], columns=["id", "category", "value"] ) df = df.set_index(["id", "category"]) df[df.value < 0].groupby("id").sum() ``` #### Problem description When groupby is over a `Int64Index` in a `MultiIndex` for an empty DataFrame, the groupby fails with error: `ValueError: Unable to fill values because Int64Index cannot contain NA` #### Expected Output The groupby should not raise an error, instead the code above should output an empty DataFrame as would happen for `df[df.value < 0].groupby("category").sum()` #### Output of ``pd.show_versions()`` <details> ``` INSTALLED VERSIONS ------------------ commit : None python : 3.6.9.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 : 1.0.0 numpy : 1.18.1 pytz : 2019.2 dateutil : 2.8.0 pip : 18.1 setuptools : 41.6.0 Cython : None pytest : 5.1.2 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : 2.8.3 (dt dec pq3 ext lo64) jinja2 : 2.10.1 IPython : 7.8.0 pandas_datareader: None bs4 : 4.8.0 bottleneck : None fastparquet : None gcsfs : None lxml.etree : None matplotlib : 3.1.1 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : 0.13.0 pytables : None pytest : 5.1.2 pyxlsb : None s3fs : None scipy : 1.4.1 sqlalchemy : 1.3.6 tables : None tabulate : 0.8.6 xarray : None xlrd : 1.2.0 xlwt : None xlsxwriter : None numba : None ``` </details>
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Backport PR #31477 on branch 1.0.x (REGR: Fix TypeError in groupby min / max of period column)
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Backport PR #31477: REGR: Fix TypeError in groupby min / max of period column
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REF: move convert_scalar out of cython
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2020-02-04T23:01:56Z
2020-02-05T02:50:39Z
2020-02-05T02:45:09Z
MEMBER
null
There's nothing about this that particularly benefits from being in cython (I think until recently this was used within index.pyx) and its clearer in python. Plus we get a slightly smaller/faster build.
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CLN: misc tslibs, annotations, unused imports
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2020-02-04T23:14:09Z
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2020-02-04T23:23:05Z
2020-02-12T21:49:03Z
2020-02-05T00:43:13Z
CONTRIBUTOR
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These deprecated attributes have all been removed, so ``._deprecated`` is no longer needed.
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31,677
Pandas excel output specify column names to write is broken in 1.0.0
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2020-02-05T00:06:23Z
2020-02-06T23:41:13Z
2020-02-06T23:41:13Z
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#### Example code: df = pd.DataFrame(np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]]),columns=['col_a', 'col_b', 'col_c']) excelwritename = '/tmp/Test%s.xlsx' %pd.datetime.now(pytz.timezone('US/Pacific')).strftime('%b%d_%I_%M %p') with pd.ExcelWriter(excelwritename, engine='xlsxwriter',datetime_format='mmm dd yyyy hh:mm AM/PM') as writer: df.to_excel(writer,columns=['col_a','col_b'],sheet_name = 'xyz') #### Problem description: specifying column names to output to excel is no longer working in pandas 1.0.0 and it outputs all columns in the df. Checked different versions of xlsxwriter, but pandas 0.25.3 works fine, while 1.0.0 does not. #### Expected Output It should only output columns that are specified, but it outputs all columns of df #### 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 : 19.2.0 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.0.0 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 45.1.0.post20200127 Cython : 0.29.14 pytest : 5.3.4 hypothesis : 4.54.2 sphinx : 2.3.1 blosc : None feather : None xlsxwriter : 1.2.0 lxml.etree : 4.4.2 html5lib : 1.0.1 pymysql : None psycopg2 : 2.8.4 (dt dec pq3 ext lo64) jinja2 : 2.10.3 IPython : 7.11.1 pandas_datareader: None bs4 : 4.8.2 bottleneck : 1.3.1 fastparquet : None gcsfs : None lxml.etree : 4.4.2 matplotlib : 3.1.1 numexpr : 2.7.0 odfpy : None openpyxl : 3.0.3 pandas_gbq : None pyarrow : None pytables : None pytest : 5.3.4 pyxlsb : None s3fs : None scipy : 1.3.1 sqlalchemy : 1.3.13 tables : 3.6.1 tabulate : None xarray : None xlrd : 1.2.0 xlwt : 1.3.0 xlsxwriter : 1.2.0 numba : 0.48.0 </details>
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Backport PR #31668 on branch 1.0.x (REGR: Fixed handling of Categorical in cython ops)
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2020-02-05T00:31:37Z
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Backport PR #31668: REGR: Fixed handling of Categorical in cython ops
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REGR: fix op(frame, frame2) with reindex
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2020-02-05T00:55:52Z
2020-02-19T10:00:44Z
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- [x] closes #31623 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry cc @TomAugspurger this is pretty ugly, and I'm not sure how well it will behave if either frame has MultiIndex colums. On the plus side, it could improve perf in the many-columns-but-small-intersection case. The ugliness might be improved by moving this check to before the _align_method_FRAME call
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CLN: remove libindex.get_value_at
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There was a usage in MultiIndex.get_value that was just removed, leaving just the one in sparse.array that this changes to handle in python-space.
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560,124,547
MDExOlB1bGxSZXF1ZXN0MzcxMTcwNjAw
31,681
REF: Use _maybe_cast_indexer and dont override Categorical.get_loc
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1
2020-02-05T03:55:04Z
2020-02-07T00:05:47Z
2020-02-06T23:59:31Z
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MDU6SXNzdWU1NjAxMjY0Mjc=
31,682
pandas.util.testing is deprecated. Use the functions in the public API at pandas.testing instead. from pandas.util.testing import assert_frame_equal
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7
2020-02-05T04:02:58Z
2020-08-30T05:04:56Z
2020-02-15T09:02:04Z
NONE
null
Does anyone could help?
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Why does CategoricalIndex.get_value call _convert_scalar_indexer?
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5
2020-02-05T04:14:54Z
2020-02-07T00:12:53Z
2020-02-07T00:12:52Z
MEMBER
null
cc @jreback @jorisvandenbossche @TomAugspurger the meat of CategoricalIndex.get_value reads: ``` def get_value(self, series, key): k = key try: k = self._convert_scalar_indexer(k, kind="getitem") indexer = self.get_loc(k) return series.take([indexer])[0] except (KeyError, TypeError): pass # we might be a positional inexer return Index.get_value(self, series, key) ``` The thing is, if we actually track down that _convert_scalar_indexer call, with `kind="getitem"` it always passes through to the base class method, which ends up checking: ``` if kind == "getitem" and is_float(key): if not self.is_floating(): self._invalid_indexer("label", key) ``` But AFAICT `CategoricalIndex.is_floating()` is always False, so it looks like the call in `get_value` is a no-op, which I expect was not the original intention. Also possibly undesired: ``` idx = pd.Index(range(4)).astype("f8") / 2 cidx = pd.CategoricalIndex(idx) ser1 = pd.Series(range(4), index=idx) ser2 = pd.Series(range(4), index=cidx) >>> ser1[1.0] 2 >>> ser2[1.0] [...] TypeError [...] >>> ser1[2] [...] KeyError [...] >>> ser2[2] 2 ``` Can anyone confirm if the no-op call and/or different `__getitem__` behavior is intentional?
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MDExOlB1bGxSZXF1ZXN0MzcxMjA4NzAx
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BUG: string methods with NA
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10
2020-02-05T06:41:15Z
2020-03-10T14:09:34Z
2020-03-10T14:08:01Z
CONTRIBUTOR
null
- [x] closes #31632 - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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31,685
Backport PR #31614: REGR: fix non-reduction apply with tz-aware objects
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0
2020-02-05T08:30:02Z
2020-02-05T09:35:53Z
2020-02-05T09:35:44Z
MEMBER
null
backport https://github.com/pandas-dev/pandas/pull/31614
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MDExOlB1bGxSZXF1ZXN0MzcxMjQ1NjU4
31,686
DOC: fixup v1.0.1 whatsnew entries
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1
2020-02-05T08:36:47Z
2020-02-05T08:40:18Z
2020-02-05T08:39:55Z
MEMBER
null
Fixing the merge of https://github.com/pandas-dev/pandas/pull/31614
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31,687
pd.where OverflowError with large numbers
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13
2020-02-05T08:43:50Z
2021-07-28T04:38:36Z
null
NONE
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd import numpy as np df = pd.DataFrame([[1.0, 2e25],[np.nan, 0.1]]) # Works when applied to individual columns print(df[0].where(pd.notnull(df[0]), None)) print(df[1].where(pd.notnull(df[1]), None)) # Breaks for whole dataframe print(df.where(pd.notnull(df), None)) ``` #### Problem description The above code does not work with 1.0.0, but used to work with at least 0.25.0. Replacing large floats with pd.where breaks Running pd.where on a dataframe that contains large float values and the replacement value is of a different dtype throws `OverflowError: int too big to convert`: ``` applied = getattr(b, f)(**kwargs) File "***\venv\lib\site-packages\pandas\core\internals\blocks.py", line 1426, in where return self._maybe_downcast(blocks, "infer") File "***\venv\lib\site-packages\pandas\core\internals\blocks.py", line 514, in _maybe_downcast return _extend_blocks([b.downcast(downcast) for b in blocks]) File "***\venv\lib\site-packages\pandas\core\internals\blocks.py", line 514, in <listcomp> return _extend_blocks([b.downcast(downcast) for b in blocks]) File "***\venv\lib\site-packages\pandas\core\internals\blocks.py", line 552, in downcast return self.split_and_operate(None, f, False) File "***\venv\lib\site-packages\pandas\core\internals\blocks.py", line 496, in split_and_operate nv = f(m, v, i) File "***\venv\lib\site-packages\pandas\core\internals\blocks.py", line 549, in f val = maybe_downcast_to_dtype(val, dtype="infer") File "***\venv\lib\site-packages\pandas\core\dtypes\cast.py", line 135, in maybe_downcast_to_dtype converted = maybe_downcast_numeric(result, dtype, do_round) File "***\venv\lib\site-packages\pandas\core\dtypes\cast.py", line 222, in maybe_downcast_numeric new_result = trans(result).astype(dtype) OverflowError: int too big to convert ``` Replacing data one column at a time works. #### Expected Output ``` Name: 1, dtype: float64 0 1 0 1 2e+25 1 None 0.1 ``` #### 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 142 Stepping 9, GenuineIntel byteorder : little LC_ALL : None LANG : None LOCALE : None.None pandas : 1.0.0 numpy : 1.16.2 pytz : 2018.9 dateutil : 2.8.0 pip : 10.0.1 setuptools : 39.1.0 Cython : None pytest : 4.4.0 hypothesis : None sphinx : 2.0.0 blosc : None feather : None xlsxwriter : None lxml.etree : 4.3.3 html5lib : None pymysql : None psycopg2 : None jinja2 : 2.11.1 IPython : None pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : 4.3.3 matplotlib : None numexpr : None odfpy : None openpyxl : 2.6.2 pandas_gbq : None pyarrow : None pytables : None pytest : 4.4.0 pyxlsb : None s3fs : None scipy : None sqlalchemy : 1.3.3 tables : None tabulate : None xarray : None xlrd : 1.2.0 xlwt : None xlsxwriter : None numba : None </details>
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31,688
Backport PR #31666: BUG: Block.iget not wrapping timedelta64/datetime64
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0
2020-02-05T08:45:09Z
2020-02-05T09:47:35Z
2020-02-05T09:47:31Z
MEMBER
null
Backport of https://github.com/pandas-dev/pandas/pull/31666
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31,689
Backport PR #29243 on branch 1.0.x (Follow up PR: #28097 Simplify branch statement)
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0
2020-02-05T08:47:51Z
2020-02-05T09:47:57Z
2020-02-05T09:47:56Z
NONE
null
Backport PR #29243: Follow up PR: #28097 Simplify branch statement
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TST: add test for regression in groupby with empty MultiIndex level
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0
2020-02-05T09:00:05Z
2020-02-05T10:17:11Z
2020-02-05T10:17:06Z
MEMBER
null
Closes https://github.com/pandas-dev/pandas/issues/31670 (the actual fix was already in #29243)
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31,691
Inconsistent kwargs argument 'color' passed to upstream matplotlib plot functions
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14
2020-02-05T10:11:50Z
2020-12-14T17:27:38Z
2020-12-14T17:27:38Z
NONE
null
In matplotlib.pyplot.bar , there is a keyword argument called 'color' which can control the color of all bars as well as each bar, e.g., <img width="639" alt="image" src="https://user-images.githubusercontent.com/10172392/73830682-08257200-4840-11ea-9aa0-64bb6bb2b9ab.png"> However, in Pandas DataFrame.plot.bar, by passing a list into 'color', the color of all bars is controlled only by the 1st element in the list, i.e., <img width="630" alt="image" src="https://user-images.githubusercontent.com/10172392/73831000-900b7c00-4840-11ea-8121-fe139365fdfc.png"> Ironically, if we pass in a list of list into 'color', we can control the color of each bar, i.e., <img width="651" alt="image" src="https://user-images.githubusercontent.com/10172392/73832150-9995e380-4842-11ea-9e35-6345364168b5.png"> So my question is why the behavior of the 'color' argument different from that in matplotlib? Is this intended inconsistency?
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31,692
Backport PR #31690 on branch 1.0.x (TST: add test for regression in groupby with empty MultiIndex level)
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0
2020-02-05T10:17:17Z
2020-02-05T11:09:51Z
2020-02-05T11:09:51Z
NONE
null
Backport PR #31690: TST: add test for regression in groupby with empty MultiIndex level
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31,693
Timestamps are coerced to different types in 0.25.3 and 1.0.0 when selecting a row
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2020-02-05T10:45:52Z
2020-02-05T12:10:34Z
2020-02-05T12:10:34Z
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#### Code Sample, a copy-pastable example if possible ```python import pandas as pd df = pd.DataFrame({'TIME': [pd.to_datetime('2020-01-01 12:00')], 'STRING': ['ABC']}) print(type(df.iloc[0]['TIME'])) ``` #### Problem description In 0.25.3 the code above results in `<class 'pandas._libs.tslibs.timestamps.Timestamp'>` whereas in 1.0.0 it is `numpy.datetime64`. I could not find anything about this specifically in the release notes. Is it intended?
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31,694
ENH: Support dateutil.tz.tzrange objects
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2020-02-05T11:16:21Z
2020-02-05T17:57:47Z
null
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python mytz = dateutil.tz.tzrange("EST", -18000, "EDT", -14400, dateutil.relativedelta.relativedelta(hours=+2, month=4, weekday=dateutil.relativedelta.SU(+1)), dateutil.relativedelta.relativedelta(hours=+1, month=10, weekday=dateutil.relativedelta.SU(-1))) pd.to_datetime('20190204', utc=True).tz_convert(mytz) ``` > --------------------------------------------------------------------------- > AttributeError Traceback (most recent call last) > pandas\_libs\tslibs\timezones.pyx in pandas._libs.tslibs.timezones.get_dst_info() > > AttributeError: 'NoneType' object has no attribute 'total_seconds' > Exception ignored in: 'pandas._libs.tslibs.conversion.localize_tso' > Traceback (most recent call last): > File "pandas\_libs\tslibs\timezones.pyx", line 220, in pandas._libs.tslibs.timezones.get_dst_info > AttributeError: 'NoneType' object has no attribute 'total_seconds' > Out[243]: Timestamp('2019-02-04 00:00:00') #### Problem description `tz_convert` fails on custom timezone with DST provided. Here is the example with `dateutil` but it would fail with any custom timezone with DST offset #### Expected Output `Timestamp('2019-02-03 19:00:00-0500', tz='mytz')` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.7.4.final.0 python-bits : 64 OS : Windows OS-release : 10 machine : AMD64 processor : Intel64 Family 6 Model 85 Stepping 4, GenuineIntel byteorder : little LC_ALL : None LANG : None LOCALE : None.None pandas : 0.25.1 numpy : 1.16.5 pytz : 2019.3 dateutil : 2.8.0 pip : 19.2.3 setuptools : 41.4.0 Cython : 0.29.13 pytest : 5.2.1 hypothesis : None sphinx : 2.2.0 blosc : None feather : None xlsxwriter : 1.2.1 lxml.etree : 4.4.1 html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : 7.8.0 pandas_datareader: None bs4 : 4.8.0 bottleneck : 1.2.1 fastparquet : None gcsfs : None lxml.etree : 4.4.1 matplotlib : 3.1.1 numexpr : 2.7.0 odfpy : None openpyxl : 3.0.0 pandas_gbq : None pyarrow : 0.13.0 pytables : None s3fs : None scipy : 1.3.1 sqlalchemy : 1.3.9 tables : 3.5.2 xarray : 0.14.0 xlrd : 1.2.0 xlwt : 1.3.0 xlsxwriter : 1.2.1 </details>
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DOC: Removed Notes from DataFrame.applymap
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2020-02-05T11:40:05Z
2020-06-03T07:53:19Z
2020-06-03T07:53:19Z
CONTRIBUTOR
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- closes #31620 Documentation screenshot: ![Screenshot from 2020-02-05 17-08-33](https://user-images.githubusercontent.com/39258575/73838709-5172c300-483a-11ea-96b4-6faa1918b73f.png)
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Where did check_bool_array_indexer move to?
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2020-02-05T13:07:27Z
2020-02-05T13:39:07Z
2020-02-05T13:36:13Z
NONE
null
I was leveraging the following: ``` pd.api.indexers.check_bool_array_indexer ``` And at v1.0.0, it is gone, what is the comparable operation to this?
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560,361,772
MDU6SXNzdWU1NjAzNjE3NzI=
31,697
`DataFrame.resample()` breaks when rule parameter is of type `DateOffset`
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2020-02-05T13:09:50Z
2021-07-28T04:40:05Z
null
NONE
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd # Some exemplary data df = pd.DataFrame({'Timestamp': pd.date_range('2020-01', '2020-03', periods=5), 'Amount': [5, 10, 15, 20, 25]}, columns=['Timestamp', 'Amount']) working = df.resample('MS', on='Timestamp').sum() # This one works failing = df.resample(pd.DateOffset(months=1), on='Timestamp').sum() # This one fails ``` #### Problem description According to the documentation, the `rule=` parameter of `DataFrame.resample()` can be of type `DateOffset`, `Timedelta` or `str`. Apparently, it actually expects some of the `DateOffset` subclasses (like `MonthEnd`, `BusinessDay`, etc.), because `rule_code` attribute is not defined in the parent class. Hence, the error: ``` File "~/.conda/envs/py37-simple/lib/python3.7/site-packages/pandas/core/generic.py", line 8114, in resample level=level, File "~/.conda/envs/py37-simple/lib/python3.7/site-packages/pandas/core/resample.py", line 1269, in resample tg = TimeGrouper(**kwds) File "~/.conda/envs/py37-simple/lib/python3.7/site-packages/pandas/core/resample.py", line 1341, in __init__ rule = freq.rule_code File "~/.conda/envs/py37-simple/lib/python3.7/site-packages/pandas/tseries/offsets.py", line 460, in rule_code return self._prefix File "~/.conda/envs/py37-simple/lib/python3.7/site-packages/pandas/tseries/offsets.py", line 456, in _prefix raise NotImplementedError("Prefix not defined") NotImplementedError: Prefix not defined ``` #### Expected Output The `resample()` method is expected to work with plain `DateOffset` instances passed for `rule=` attribute. #### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] 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 : None LOCALE : None.UTF-8 pandas : 1.0.0 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 44.0.0.post20200106 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 : 7.12.0 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 : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : None </details>
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Backport PR #31596 on branch 1.0.x (BUG: read_csv used in file like object RawIOBase is not recognize encoding option)
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0
2020-02-05T13:27:18Z
2020-02-05T14:16:21Z
2020-02-05T14:16:20Z
NONE
null
Backport PR #31596: BUG: read_csv used in file like object RawIOBase is not recognize encoding option
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31,699
DOC: Update 1.0.1 release notes
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0
2020-02-05T13:51:06Z
2020-02-05T15:28:25Z
2020-02-05T14:43:22Z
CONTRIBUTOR
null
cc @jorisvandenbossche
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TYP: remove type:ignore from pandas/io/common.py
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started to fixturize pandas/tests/base
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2020-02-05T14:32:07Z
2020-02-15T01:22:29Z
2020-02-15T01:12:49Z
CONTRIBUTOR
null
Part of #23877 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` ------------------------------------------- I didn't apply the fixtures to the rest of `test_ops.py` yet since @jreback voiced some [concerns in this comment](https://github.com/pandas-dev/pandas/pull/30147#discussion_r356587642).
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Backport PR #31699 on branch 1.0.x (DOC: Update 1.0.1 release notes)
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0
2020-02-05T14:43:33Z
2020-02-05T15:22:37Z
2020-02-05T15:22:36Z
NONE
null
Backport PR #31699: DOC: Update 1.0.1 release notes
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Backport PR #31616 on branch 1.0.x (REGR: Fixed AssertionError in groupby)
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2020-02-05T14:55:38Z
2020-02-05T15:40:56Z
2020-02-05T15:40:56Z
NONE
null
Backport PR #31616: REGR: Fixed AssertionError in groupby
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DOC: fix contributors listing for v1.0.1
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1
2020-02-05T15:28:05Z
2020-02-05T15:54:43Z
2020-02-05T15:54:39Z
MEMBER
null
Follow-up on https://github.com/pandas-dev/pandas/pull/31699
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31,705
Add `shift` to `dt` accessor
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2
2020-02-05T15:35:28Z
2021-07-28T04:40:49Z
null
NONE
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd import numpy as np df = pd.DataFrame( { "date": pd.date_range("2020", freq="D", periods=10), "value": np.random.rand(10), } ) shifted_dates = df.date.dt.shift(1) ``` #### Problem description I always thought that the `dt` accessor should replicate more or less the functionality of a DatetimeIndex to a series or a column of a dataframe. If I can do it with a DatetimeIndex, I should be able to do it with a collection of datetimes too, right? #### Expected Output This is my workaround to obtain the expected output. It's not very nice. ```python index = df.set_index("date").index index.freq = index.inferred_freq shifted_dates = df.date.copy() shifted_dates[:] = index.shift(1) ``` #### 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 60 Stepping 3, GenuineIntel byteorder : little LC_ALL : None LANG : None LOCALE : None.None pandas : 1.0.0 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 45.1.0.post20200127 Cython : 0.29.14 pytest : 5.3.5 hypothesis : 5.4.1 sphinx : 2.3.1 blosc : None feather : None xlsxwriter : 1.2.7 lxml.etree : 4.5.0 html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.11.1 IPython : 7.12.0 pandas_datareader: None bs4 : 4.8.2 bottleneck : 1.3.1 fastparquet : None gcsfs : None lxml.etree : 4.5.0 matplotlib : 3.1.3 numexpr : 2.7.1 odfpy : None openpyxl : 3.0.3 pandas_gbq : None pyarrow : None pytables : None pytest : 5.3.5 pyxlsb : None s3fs : 0.4.0 scipy : 1.3.2 sqlalchemy : 1.3.13 tables : 3.6.1 tabulate : None xarray : None xlrd : 1.2.0 xlwt : 1.3.0 xlsxwriter : 1.2.7 numba : 0.48.0 </details>
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Backport PR #31704 on branch 1.0.x (DOC: fix contributors listing for v1.0.1)
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0
2020-02-05T15:54:50Z
2020-02-05T15:57:47Z
2020-02-05T15:57:47Z
NONE
null
Backport PR #31704: DOC: fix contributors listing for v1.0.1
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31,707
Manul backport of pr 31666 on 1.0.x
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2
2020-02-05T16:18:53Z
2020-02-05T16:27:11Z
2020-02-05T16:27:00Z
MEMBER
null
Kind of confused, it looks like the test implemented by 31666 already got backported?
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31,708
Series.astype(str, skipna=True) vanished in the 1.0 release
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2020-02-05T16:39:32Z
2021-04-06T16:01:03Z
null
NONE
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#### Code Sample, a copy-pastable example if possible ```python pd.Series([None, 42]).astype(str, skipna=True) ``` results in `TypeError: astype() got an unexpected keyword argument 'skipna'` #### Problem description The provided snippet used to work before the 1.0 release. With the `skipna` argument, the `None` was preserved as a real `np.nan` type, instead of being converted to the string `nan`. The `skipna` argument seems to have gone in the 1.0 release and I can't find any way to restore this behavior without a custom function being passed to `apply`. #### Expected Output A series with `[np.nan, '42']` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.8.1.final.0 python-bits : 64 OS : Linux OS-release : 5.5.1-arch1-1 machine : x86_64 processor : byteorder : little LC_ALL : None LANG : en_US.utf8 LOCALE : en_US.UTF-8 pandas : 1.0.0 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 19.3 setuptools : 44.0.0 Cython : None pytest : 5.3.5 hypothesis : None sphinx : 2.2.1 blosc : None feather : None xlsxwriter : None lxml.etree : 4.4.2 html5lib : 1.0.1 pymysql : None psycopg2 : 2.8.4 (dt dec pq3 ext lo64) jinja2 : 2.11.1 IPython : 7.12.0 pandas_datareader: 0.8.1 bs4 : 4.8.2 bottleneck : None fastparquet : None gcsfs : None lxml.etree : 4.4.2 matplotlib : 3.1.3 numexpr : 2.7.1 odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pytest : 5.3.5 pyxlsb : None s3fs : None scipy : 1.4.1 sqlalchemy : 1.3.13 tables : None tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : None </details>
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31,709
CLN: _convert_scalar_indexer only handle "loc" and "getitem"
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2
2020-02-05T16:43:15Z
2020-02-07T01:54:35Z
2020-02-07T01:46:52Z
MEMBER
null
`_convert_scalar_indexer` is called with kind="iloc" from only one place, and in that case 1) the base class method is equivalent to just the 1-liner `self._validate_indexer("positional", key, "iloc")` 2) all subclasses just call the base class method So by inlining that 1-liner, we can take the "iloc" case out of `_convert_scalar_indexer` altogether. kind=None is never passed, so we can rip that right out. Ultimately I want to disentable/de-duplicate/disambiguate `_convert_scalar_indexer` vs `_maybe_cast_indexer` Partial overlap with #31625.
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MDU6SXNzdWU1NjA0OTc2Mzk=
31,710
ValueError: buffer source array is read-only
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9
2020-02-05T16:47:31Z
2020-10-16T21:35:56Z
2020-03-17T01:34:15Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python >>> index = pd.date_range('2020', 'now', freq='1h') >>> arr = np.zeros_like(index) >>> arr.setflags(write=False) >>> pd.Series(arr, index=index).resample('1d').agg('last') ------------------------------------------------------------------------- ~/pandas/pandas/_libs/groupby.pyx in pandas._libs.groupby.group_last() ~/pandas/pandas/_libs/groupby.cpython-37m-x86_64-linux-gnu.so in View.MemoryView.memoryview_cwrapper() ~/pandas/pandas/_libs/groupby.cpython-37m-x86_64-linux-gnu.so in View.MemoryView.memoryview.__cinit__() ValueError: buffer source array is read-only ``` #### Problem description Groupby fails on some read-only buffers (I couldn't quickly reproduce it with `.groupby()` itself, sorry). The prime solution would be to add `const` specifier to the input `values` here (and related entries): https://github.com/pandas-dev/pandas/blob/0b6debf825db39f8f63d300cb8007a7996d002fc/pandas/_libs/groupby.pyx#L853 if it were not for Cython's non-support of const fused types (https://github.com/cython/cython/issues/1772), resolved in (https://github.com/cython/cython/pull/3118), but despite [miniscule change](https://github.com/cython/cython/pull/3118/files?file-filters%5B%5D=.py) only scheduled for release in Cython 3.0. I guess wait until then. #### Expected Output Resampling/groupby works with read-only arrays. #### Output of ``pd.show_versions()`` pandas 1.1.0.dev0+361.gf0b00f887 cython 0.29.14
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31,711
ENH: read_csv parse_dates should use datetime64[us] instead of datetime64[ns] if date out of bound is detected.
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#### Code Sample, a copy-pastable example if possible ``` import pandas as pd import numpy as np df = pd.read_csv("./Artikelstatus_Augsburg.csv", sep=';', parse_dates=['VON_DTM','BIS_DTM'], infer_datetime_format=True) print(df.info()) print(df.head()) ``` ``` <class 'pandas.core.frame.DataFrame'> RangeIndex: 14472 entries, 0 to 14471 Data columns (total 4 columns): Artikel 14472 non-null int64 ATTRIBUT 14472 non-null int64 VON_DTM 14472 non-null datetime64[ns] BIS_DTM 14472 non-null object dtypes: datetime64[ns](1), int64(2), object(1) memory usage: 452.3+ KB None Artikel ATTRIBUT VON_DTM BIS_DTM 0 17 0 2018-10-01 00:00:00 2018-11-21 16:25:18 1 17 3 2018-11-21 16:25:19 2999-12-31 23:59:59 2 35 0 2018-10-01 00:00:00 2018-11-30 11:38:21 3 35 2 2018-11-30 11:38:22 2018-12-04 17:09:05 4 35 0 2018-12-04 17:09:06 2018-12-05 11:09:24 ``` #### Problem description `read_csv` with parameteter `parse_dates` uses `datetime64[ns]` as default. That datatype, however, only covers dates between the years 1678 an 2262. Many systems use hardcoded special dates for `-Inf` or `Inf`, including `0001-01-01 00:00:00`, `2999-12-31 23:59:59` or `9999-12-31 23:59:59`. The current behavior of `read_csv` is that an `object` column instead of a `datetime64[us]` is returned. Using the `date_parser` argument leads to a huge performance drop and even solutions like `na_values = ['2999-12-31 23:59:59']` do not work. Instead of an `object` column, a `datetime64[us]` column should be returned, when an out-of-bounds date is found. Possible approaches to solve the issue include autodectection by `csv.Sniffer`, a separate parameter `datetime_unit` or backtracking. #### Expected Output ``` <class 'pandas.core.frame.DataFrame'> RangeIndex: 14472 entries, 0 to 14471 Data columns (total 4 columns): Artikel 14472 non-null int64 ATTRIBUT 14472 non-null int64 VON_DTM 14472 non-null datetime64[ns] BIS_DTM 14472 non-null datetime64[us] dtypes: datetime64[ns](1), datetime64[us](1), int64(2) memory usage: 452.3+ KB None Artikel ATTRIBUT VON_DTM BIS_DTM 0 17 0 2018-10-01 00:00:00 2018-11-21 16:25:18 1 17 3 2018-11-21 16:25:19 2999-12-31 23:59:59 2 35 0 2018-10-01 00:00:00 2018-11-30 11:38:21 3 35 2 2018-11-30 11:38:22 2018-12-04 17:09:05 4 35 0 2018-12-04 17:09:06 2018-12-05 11:09:24 ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit: None python: 3.7.4.final.0 python-bits: 64 OS: Linux OS-release: 4.15.0-1052-gcp machine: x86_64 processor: x86_64 byteorder: little LC_ALL: None LANG: en_US.UTF-8 LOCALE: en_US.UTF-8 pandas: 0.24.1 pytest: None pip: 19.2.2 setuptools: 41.0.1 Cython: 0.29.14 numpy: 1.16.4 scipy: 1.3.1 pyarrow: 0.15.1 xarray: None IPython: 7.8.0 sphinx: 2.2.0 patsy: 0.5.0 dateutil: 2.8.0 pytz: 2019.2 blosc: None bottleneck: 1.2.1 tables: 3.4.4 numexpr: 2.6.8 feather: None matplotlib: 3.1.1 openpyxl: None xlrd: 1.2.0 xlwt: None xlsxwriter: None lxml.etree: None bs4: None html5lib: None sqlalchemy: 1.3.10 pymysql: None psycopg2: None jinja2: 2.10.1 s3fs: None fastparquet: None pandas_gbq: None pandas_datareader: None gcsfs: None </details>
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560,518,845
MDExOlB1bGxSZXF1ZXN0MzcxNDk0OTg4
31,712
DOC Adds newline to dataframe melt
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2
2020-02-05T17:24:05Z
2020-02-05T21:06:32Z
2020-02-05T21:06:25Z
CONTRIBUTOR
null
Adds newline before versionadded in `dataframe.melt` so that sphinx/rst can pick it up and render it correctly. - [ ] closes #xxxx - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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560,527,706
MDExOlB1bGxSZXF1ZXN0MzcxNTAyMjMw
31,713
REF: Index.get_value call self.get_loc instead of self._engine.get_loc
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1
2020-02-05T17:41:31Z
2020-02-06T23:58:07Z
2020-02-06T23:57:36Z
MEMBER
null
This makes Index.get_value match ExtensionIndex.get_value, so we can remove the latter. Along with implementing _should_fallback_to_positional, this allows us to rip out Float64Index.get_value.
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560,548,177
MDExOlB1bGxSZXF1ZXN0MzcxNTE4ODk1
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DOC: Fix whatsnew in 1.0.x
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0
2020-02-05T18:22:20Z
2020-02-05T19:08:12Z
2020-02-05T19:08:08Z
CONTRIBUTOR
null
Need to figure out a better system for this :/ I've already tagged and pushed 1.0.1, so I'm applying this to my local doc build.
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