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31,315
REF: tighten what we accept in TimedeltaIndex._simple_new
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2020-02-09T15:40:34Z
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31,316
CLN: internals.managers
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0
2020-01-25T23:27:06Z
2020-01-26T00:32:50Z
2020-01-26T00:14:20Z
MEMBER
null
Mostly annotations, use fastpath for SingleBlockManager constructor where possible.
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555,158,351
MDExOlB1bGxSZXF1ZXN0MzY3MTY4NjQ1
31,317
Move DataFrame.info() to live with similar functions
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2
2020-01-26T00:23:12Z
2020-01-29T04:39:19Z
2020-01-26T01:15:23Z
CONTRIBUTOR
null
#31233 - [x ] closes #31233 (Not sure these are relevant for a doc change?) - [ ] tests added / passed - [ ] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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31,318
REF: make PeriodIndex.get_value wrap PeriodIndex.get_loc
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6
2020-01-26T01:34:53Z
2020-03-12T13:31:07Z
2020-01-28T02:22:56Z
MEMBER
null
AFAICT the only behavior this changes is in how datetime objects are treated. After this they are more consistent. ``` dti = pd.date_range("2016-01-01", periods=3, freq="MS") pi = dti.to_period("H") ser = pd.Series(range(7, 10), index=pi) key = dti[0] ``` master ``` >>> pi.get_loc(key) 0 >>> pi.get_value(ser, key) KeyError: Timestamp('2016-01-01 00:00:00', freq='MS') >>> ser.loc[key] 7 >>> ser[key] KeyError: Timestamp('2016-01-01 00:00:00', freq='MS') ``` Under this PR, the get_value and `__getitem__` calls both return 7.
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555,164,427
MDExOlB1bGxSZXF1ZXN0MzY3MTcyOTA0
31,319
BUG Series rolling count ignores min periods
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3
2020-01-26T01:38:28Z
2020-01-26T04:45:08Z
2020-01-26T02:34:56Z
MEMBER
null
This PR targets 1.0.x branch and is a manual backport for #30923 - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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31,320
Backport PR: Series rolling count ignores min_periods
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2020-01-26T02:46:14Z
2020-01-26T04:44:44Z
2020-01-26T04:17:59Z
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This is a backport for #30923
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CLN: dont return anything from _validate_indexer; annotations
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Update testing.py
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CI: Fix jedi upgrades causes deprecation warning
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2020-01-26T09:45:14Z
2020-01-27T15:49:41Z
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- [ ] closes #31324 - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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CI: seems jedi caused ci to fail in certain versions
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``` self = <pandas.tests.indexes.test_base.TestIndex object at 0x7f666b28c990> ip = <IPython.core.interactiveshell.InteractiveShell object at 0x7f666b28ccd0> @async_mark() async def test_tab_complete_warning(self, ip): # ***/issues/16409 pytest.importorskip("IPython", minversion="6.0.0") from IPython.core.completer import provisionalcompleter code = "import pandas as pd; idx = pd.Index([1, 2])" await ip.run_code(code) with tm.assert_produces_warning(None): with provisionalcompleter("ignore"): > list(ip.Completer.completions("idx.", 4)) pandas/tests/indexes/test_base.py:2418: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = <contextlib._GeneratorContextManager object at 0x7f666b2a0a50> type = None, value = None, traceback = None def __exit__(self, type, value, traceback): if type is None: try: > next(self.gen) E AssertionError: Caused unexpected warning(s): [('DeprecationWarning', DeprecationWarning('Deprecated since version 0.16.0. Use get_signatures()[...].params'), '/home/vsts/miniconda3/envs/pandas-dev/lib/python3.7/site-packages/jedi/cache.py', 111)] ```
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31,325
BUG: MultiIndex intersection with sort=False does not preserve order
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0
2020-01-26T10:05:17Z
2020-02-12T16:04:23Z
2020-02-12T16:04:23Z
CONTRIBUTOR
null
```python import pandas as pd arrays = [['bar', 'bar', 'baz', 'baz', 'foo', 'foo', 'qux', 'qux'], ['one', 'two', 'one', 'two', 'one', 'two', 'one', 'two']] tuples = list(zip(*arrays)) idx = pd.MultiIndex.from_tuples(tuples, names=['first', 'second']) left = idx[2::-1] print(left) #> MultiIndex([('baz', 'one'), #> ('bar', 'two'), #> ('bar', 'one')], #> names=['first', 'second']) right = idx[:5] print(right) #> MultiIndex([('bar', 'one'), #> ('bar', 'two'), #> ('baz', 'one'), #> ('baz', 'two'), #> ('foo', 'one')], #> names=['first', 'second']) # expected same order as left intersect = left.intersection(right, sort=False) print(intersect) #> MultiIndex([('bar', 'two'), #> ('baz', 'one'), #> ('bar', 'one')], #> names=['first', 'second']) ``` <sup>Created on 2020-01-25 by the [reprexpy package](https://github.com/crew102/reprexpy)</sup> #### Problem description The intersection of 2 `MultiIndex` with `sort=False` does not preserve the order, whereas other logical operators on Index and MultiIndex preserve order when `sort=False`. #### Expected Output The intersection of 2 `MultiIndex` with `sort=False` should return the common elements in the order of the left side. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : ca3bfcc54676b04ac5150c913328d26920bb2591 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 : en_US.UTF-8 LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.0.0rc0+212.gca3bfcc54 numpy : 1.17.5 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.1 setuptools : 45.1.0.post20200119 Cython : 0.29.14 pytest : 5.3.4 hypothesis : 5.3.0 sphinx : 2.3.1 blosc : None 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 lxml.etree : 4.4.2 matplotlib : 3.1.2 numexpr : 2.7.1 odfpy : None openpyxl : 3.0.1 pandas_gbq : None pyarrow : 0.15.1 pytables : None pytest : 5.3.4 pyxlsb : None s3fs : 0.4.0 scipy : 1.4.1 sqlalchemy : 1.3.13 tables : 3.6.1 tabulate : 0.8.6 xarray : 0.14.1 xlrd : 1.2.0 xlwt : 1.3.0 xlsxwriter : 1.2.7 numba : 0.47.0 </details>
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BUG: inconsistent behaviors for Index.union() and Index.intersection() with duplicates
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5
2020-01-26T16:09:21Z
2021-03-04T02:01:10Z
2021-03-04T02:01:10Z
CONTRIBUTOR
null
While working on #31312, I noticed that the behavior of `Index.union()` and `Index.intersection()` is inconsistent when there are duplicates in one of the Index. ```python import pandas as pd import traceback a = pd.Index([1, 2, 2, 3]) b = pd.Index([3, 3, 4]) def test_setops(left, right): for op in ["intersection", "union"]: for sort in [None, False]: result = getattr(left, op)(right, sort=sort) print(f"sort = {sort}, {op}: {result} -> has duplicates: {result.has_duplicates}") test_setops(a, b) #> sort = None, intersection: Int64Index([3, 3], dtype='int64') -> has duplicates: True #> sort = False, intersection: Int64Index([3, 3], dtype='int64') -> has duplicates: True #> sort = None, union: Int64Index([1, 2, 2, 3, 3, 4], dtype='int64') -> has duplicates: True #> sort = False, union: Int64Index([1, 2, 2, 3, 4], dtype='int64') -> has duplicates: True arrays = [['a', 'b', 'b', 'c'], ['1', '2', '2', '1']] a_mi = pd.MultiIndex.from_arrays(arrays, names=['first', 'second']) arrays = [['c', 'c', 'd'], ['1', '1', '2']] b_mi = pd.MultiIndex.from_arrays(arrays, names=['first', 'second']) test_setops(a_mi, b_mi) #> sort = None, intersection: MultiIndex([('c', '1')], #> names=['first', 'second']) -> has duplicates: False #> sort = False, intersection: MultiIndex([('c', '1')], #> names=['first', 'second']) -> has duplicates: False #> sort = None, union: MultiIndex([('a', '1'), #> ('b', '2'), #> ('c', '1'), #> ('d', '2')], #> names=['first', 'second']) -> has duplicates: False #> sort = False, union: MultiIndex([('a', '1'), #> ('b', '2'), #> ('c', '1'), #> ('d', '2')], #> names=['first', 'second']) -> has duplicates: False ``` <sup>Created on 2020-01-26 by the [reprexpy package](https://github.com/crew102/reprexpy)</sup> #### Problem description 1. The behavior of `intersection()` and `union()` when duplicates are present is not consistent between `Index` and `MultiIndex`. Those operations return duplicates with `Index` but not with `MultiIndex`. The documentation doesn't clearly state what to expect. 2. When duplicates are present, the size of the result of `Index.union()` depends on sort is None or False. 3. If duplicates are present on only one side, `Index.intersection()` always return duplicates. Here are more succinct examples for 2. and 3. ```python import pandas as pd a = pd.Index([1, 2, 2, 3]) b = pd.Index([3, 3, 4]) # expected [1, 2, 2, 3, 3, 3, 4] a.union(b, sort=None) #> Int64Index([1, 2, 2, 3, 3, 4], dtype='int64') a.union(b, sort=False) #> Int64Index([1, 2, 2, 3, 4], dtype='int64') # expected [3] a.intersection(b, sort=None) #> Int64Index([3, 3], dtype='int64') a.intersection(b, sort=False) #> Int64Index([3, 3], dtype='int64') # expected [3, 3] b.intersection(a, sort=None) #> Int64Index([3, 3], dtype='int64') b.intersection(a, sort=False) #> Int64Index([3, 3], dtype='int64') ``` <sup>Created on 2020-01-26 by the [reprexpy package](https://github.com/crew102/reprexpy)</sup> #### Expected Output For consistency and clarity, I think it would be better to enforce unicity in the index returned by logical operations. `Index.union()` and `Index.interesection()` are the only ones allowing duplicates. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : ca3bfcc54676b04ac5150c913328d26920bb2591 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 : en_US.UTF-8 LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.0.0rc0+212.gca3bfcc54 numpy : 1.17.5 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.1 setuptools : 45.1.0.post20200119 Cython : 0.29.14 pytest : 5.3.4 hypothesis : 5.3.0 sphinx : 2.3.1 blosc : None 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 lxml.etree : 4.4.2 matplotlib : 3.1.2 numexpr : 2.7.1 odfpy : None openpyxl : 3.0.1 pandas_gbq : None pyarrow : 0.15.1 pytables : None pytest : 5.3.4 pyxlsb : None s3fs : 0.4.0 scipy : 1.4.1 sqlalchemy : 1.3.13 tables : 3.6.1 tabulate : 0.8.6 xarray : 0.14.1 xlrd : 1.2.0 xlwt : 1.3.0 xlsxwriter : 1.2.7 numba : 0.47.0 </details>
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Consider moving tests/ outside the pandas module
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2020-01-26T16:23:22Z
2020-01-26T19:03:04Z
2020-01-26T18:13:55Z
NONE
null
#### Problem description Hi. After a `pip install pandas` the `lib/site-packages/pands/tests/` includes a lot of testing code which is definitely not relevant for me and many other end users of pandas. This bloats the installation and makes installation slower. I'm working on packaging a python environment to distribute with a preinstalled set of modules and application and there are too many popular 3rd-party modules which include unneeded test code, like `numpy`, `IPython` `jupyterlab`, etc, which needs to be striped to keep the package size down. I'll be reporting issues to these projects as well. #### Suggestion Therefore, my suggestion is to keep the `pandas` module streamlined, and move the tests out. Perhaps create a `pandas-unittests` module if people are interested in it, or just expect users to checkout the code. Another possibility would be to skip packaging the `tests` folder and `conftest.py` when creating packages to upload to `pypi.org`. Since you are now almost releasing 1.0 it might be a bit short notice to include this is such a big release. But for the next major release, it could work. Thank you very much for your attention.
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Ensure conversion to "native" types for integer EA
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15
2020-01-26T16:31:34Z
2020-10-24T03:01:56Z
2020-10-24T03:01:56Z
CONTRIBUTOR
null
- [x] closes #29738 - [x] tests added / passed - [x] passes `black pandas`
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BUG: ser.at match ser.loc with Float64Index
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1
2020-01-26T18:39:44Z
2020-01-31T04:16:09Z
2020-01-31T03:03:03Z
MEMBER
null
xref #31163.
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555,272,143
MDU6SXNzdWU1NTUyNzIxNDM=
31,330
Rows order when using slice(None) on MultiIndex Dataframe.loc
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0
2020-01-26T19:03:28Z
2020-11-25T20:51:29Z
2020-11-25T20:51:29Z
CONTRIBUTOR
null
#### Code Sample ```python df = pd.DataFrame( np.arange(12).reshape((4, 3)), index=[["a", "a", "b", "b"], [1, 2, 1, 2]], columns=[["Ohio", "Ohio", "Colorado"], ["Green", "Red", "Green"]], ) df.loc[(slice(None), [2,1]), :] # actual output, same as df, order of slice(None) level take absolut precedence Ohio Colorado Green Red Green a 1 0 1 2 2 3 4 5 b 1 6 7 8 2 9 10 11 ``` #### Problem description When working on issue #22797, I came across this situation about ordering the result of loc. Should the level not explicitely requested be used when ordering the result, and how. This may be mostly cosmetic, are one should not rely on how the resulted row are ordered, and may be a non issue. If so, feel free to close it. #### Expected Output ``` # Second level is prioritary on first level Ohio Colorado Green Red Green a 2 3 4 5 b 2 9 10 11 a 1 0 1 2 b 1 6 7 8 # ---- or ---- # Keep order of first level, then second level Ohio Colorado Green Red Green a 2 3 4 5 1 0 1 2 b 2 9 10 11 1 6 7 8 ```
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555,287,616
MDExOlB1bGxSZXF1ZXN0MzY3MjYxMDUx
31,331
BUG: Increased support for subclassed types.
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2
2020-01-26T21:03:41Z
2020-05-10T15:02:08Z
2020-05-10T15:02:05Z
CONTRIBUTOR
null
- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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31,332
Adding keep parameter to merge method
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2020-01-26T23:17:32Z
2021-07-27T05:25:45Z
2021-07-27T05:25:45Z
NONE
null
Consider the following example: import pandas as pd x = pd.DataFrame({'A': [1, 2, 3], 'X': [11, 12, 13]}) y = pd.DataFrame({'A': [1, 1, 2, 2, 3, 3], 'Y': [111, 111, 222, 222, 333, 333]}) We want to extend x with column 'Y' from y, based on 'A'. x1 = pd.merge(x, y, how='left', on='A') When we check the result, we see new rows coming from y when a key in 'A' occurs multiple times in y. It would be great to do is this way: x1 = pd.merge(x, y, how='left', on='A', keep='first') However, unfortunately, merge does not have this keep parameter. So, we have to figure out a workaround: Before we could merge x and y, duplicates based on 'A' from y must be removed. x1 = pd.merge(x, y.drop_duplicates(subset='A', keep='first'), on='A') This issue generates lots of suffering for many people, who are confused because merging results in increasing number of rows. https://stackoverflow.com/questions/37095161/number-of-rows-changes-even-after-pandas-merge-with-left-option By implementing a feature of adding 'keep' parameter to merge, we can easily avoid increasing number of rows in our initial dataframe. Additional notes: As drop_duplicates has this keep parameter, it is easy to make it backward compatible by adding 'keep' (True by default) parameter to merge. In this case it should have the same result as earlier, pd.merge(x, y, how='left', on='A', keep=True) == pd.merge(x, y, how='left', on='A') Based on my ideas, keep='first' (example: pd.merge(x, y, how='left', on='A', keep='first')) would result the same as pd.merge(x, y.drop_duplicates(subset='A', keep='first'), on='A') currently, (where subset parameter of drop_duplicates is the same as on parameter of merge.
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31,333
DEPR: indexing Series with single-entry list
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2
2020-01-27T04:20:55Z
2020-02-10T20:55:40Z
2020-02-09T17:08:54Z
MEMBER
null
- [x] closes #31299 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry Could use a better warning message, suggestions welcome.
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555,349,454
MDExOlB1bGxSZXF1ZXN0MzY3MzA2NjE0
31,334
DEPR: row-based indexing in DataFrame.__getitem__
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7
2020-01-27T04:24:57Z
2021-11-20T23:23:15Z
2020-02-08T21:46:23Z
MEMBER
null
Discussed recently in #9595. The two tests this edits are the only two that go down this path AFAICT.
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31,335
REF: share code for set-like ops in DTI/TDI/PI
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2
2020-01-27T04:41:04Z
2020-02-09T17:30:46Z
2020-02-09T16:51:59Z
MEMBER
null
The DatetimeIndexOpsMixin._concat_same_type this has can probably become the ExtensionIndex._concat_same_type default. I expect IntervalIndex can be updated to look the same pretty easily, not so sure about CategoricalIndex based on a quick look.
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555,353,303
MDU6SXNzdWU1NTUzNTMzMDM=
31,336
json normalize max level not working
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4
2020-01-27T04:44:32Z
2020-06-11T23:07:38Z
2020-01-27T05:23:49Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python from pandas.io.json import json_normalize data = [{'id': 1, 'name': "Cole Volk", 'fitness': {'height': 130, 'weight': 60}}, {'name': "Mose Reg", 'fitness': {'height': 130, 'weight': 60}}, {'id': 2, 'name': 'Faye Raker', 'fitness': {'height': 130, 'weight': 60}}] json_normalize(data, max_level=0) ``` #### Problem description The code above is from the pandas docs. I'm running python 3.6.4 and pandas==0.22.0 **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] </details>
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31,337
CLN: some minor cleanups
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0
2020-01-27T08:24:18Z
2020-01-27T21:05:08Z
2020-01-27T15:40:29Z
CONTRIBUTOR
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31,338
BUG: Timestamp UTC offset incorrect for dateutil tz in ambiguous DST time
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12
2020-01-27T10:47:32Z
2020-02-26T12:35:04Z
2020-02-26T12:35:04Z
MEMBER
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#### Code Sample, a copy-pastable example if possible If we make a Timestamp in an ambiguous DST period while specifying via the offset (or by supplying `Timestamp.value` directly) that the time is before DST switch, the representation then shows that this is after DST switch. This is backed up by calling `Timestamp.tz.utcoffset(Timestamp)`. ```python IN: t1 = pd.Timestamp(1382837400000000000, tz='dateutil/Europe/London') t1 OUT: Timestamp('2013-10-27 01:30:00+0100', tz='dateutil/GB-Eire') IN: t2 = pd.Timestamp(1382837400000000000, tz='Europe/London') t2 OUT: Timestamp('2013-10-27 01:30:00+0000', tz='Europe/London') ``` #### Problem description The reason for this bug looks to be buried deep in the interaction of `pandas` and `dateutil`. So this is what I've been able to dig up. When we try to determine whether we are in DST or not, we rely on `timezone.utcoffset` of the underlying timezone package. What gets executed in `dateutil` is this: ```python def utcoffset(self, dt): ... return self._find_ttinfo(dt).delta def _find_ttinfo(self, dt): idx = self._resolve_ambiguous_time(dt) ... def _resolve_ambiguous_time(self, dt): idx = self._find_last_transition(dt) # If we have no transitions, return the index _fold = self._fold(dt) if idx is None or idx == 0: return idx # If it's ambiguous and we're in a fold, shift to a different index. idx_offset = int(not _fold and self.is_ambiguous(dt, idx)) return idx - idx_offset ``` `dateutil` is expecting an ordinary `datetime.timedelta` object here, so this is what it does: 1. Use `_find_last_transition` to get the index of the last DST transition before `dt`. This is done by computing `timedelta.total_seconds` since epoch time. Our `pandas.Timedelta.total_seconds` is smart, and returns different `total_seconds` for before and after `DST`, since we basically return `Timedelta.value` which is the same as `Timestamp.value` when counting since epoch time (because of how `_Timestamp.__sub__` in `c_timestamp.pyx` is implemented). This is what we do (doesn't care about `dt.replace(tzinfo=None)`): ```python def total_seconds(self): """ Total duration of timedelta in seconds (to microsecond precision). """ # GH 31043 # Microseconds precision to avoid confusing tzinfo.utcoffset return (self.value - self.value % 1000) / 1e9 ``` This is what `datetime.timedelta` does (loses DST awareness after `dt.replace(tzinfo=None)`): ```python def total_seconds(self): """Total seconds in the duration.""" return ((self.days * 86400 + self.seconds) * 10**6 + self.microseconds) / 10**6 ``` 2. The remainder of `_resolve_ambiguous_time` corrects for ambiguous times, since `datetime.timedelta.total_seconds` after `dt.replace(tzinfo=None)` isn't DST-aware. It checks if we are in an ambiguous period and if this is the first time this time has occured: this is what `self._fold` is for. [fold](https://www.python.org/dev/peps/pep-0495/#the-fold-attribute) is 0 for the first time, and 1 for the second time. If it's the first time, `dateutil` shifts the relevant transition index back by 1, since it thinks that `total_seconds` always returns the number of seconds calculated using the second time. I'd like to discuss how we are going to approach this. From what I see, there isn't much we can do on our end. ~Making `total_seconds` non-DST-aware by default is bad, because that would be making our implementation less precise unless the user passes a parameter.~ Scratch that. The problem isn't so much the `total_seconds` implementation as it is the `Timestamp.__sub__` implementation which preserves `value` when we subtract epoch time. Another approach is to go to `dateutil` with this and implement a check there to avoid running the correction if they are dealing with a `pandas.Timedelta`. Might be tricky to do without introducing a dependency on pandas, though. First came across this while solving #24329 in #30995 #### Expected Output ```python IN: t1 OUT: Timestamp('2013-10-27 01:30:00+0000', tz='dateutil/GB-Eire') ``` #### 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 142 Stepping 10, GenuineIntel byteorder : little LC_ALL : None LANG : ru_RU.UTF-8 LOCALE : None.None pandas : 0.26.0.dev0+1947.gca3bfcc54.dirty numpy : 1.17.5 pytz : 2019.3 dateutil : 2.8.1 pip : 19.3.1 setuptools : 44.0.0.post20200106 Cython : 0.29.14 pytest : 5.3.4 hypothesis : 5.2.0 sphinx : 2.3.1 blosc : None 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 : None gcsfs : None lxml.etree : 4.4.2 matplotlib : 3.1.2 numexpr : 2.7.1 odfpy : None openpyxl : 3.0.1 pandas_gbq : None pyarrow : None pytables : None pytest : 5.3.4 pyxlsb : None s3fs : 0.4.0 scipy : 1.3.1 sqlalchemy : 1.3.12 tables : 3.6.1 tabulate : 0.8.6 xarray : None xlrd : 1.2.0 xlwt : 1.3.0 xlsxwriter : 1.2.7 numba : 0.47.0 </details>
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Sometimes one day of when reading date fields
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2020-01-27T11:00:16Z
2020-01-27T11:51:38Z
2020-01-27T11:51:37Z
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#### Code Sample ```python import datetime import pandas df = pandas.read_excel('28422_LZ.xlsx', sheet_name='Laufzettel') stamp = df[df.columns[3]][16].timestamp() print('first date =', datetime.datetime.utcfromtimestamp(stamp).strftime('%Y-%m-%d'), '(one day of)') df = pandas.read_excel('test.xlsx', sheet_name='Tabelle1') stamp = df[df.columns[0]][0 [28422_LZ.xlsx](https://github.com/pandas-dev/pandas/files/4116748/28422_LZ.xlsx) [test.xlsx](https://github.com/pandas-dev/pandas/files/4116749/test.xlsx) ].timestamp() print('seconde date =', datetime.datetime.utcfromtimestamp(stamp).strftime('%Y-%m-%d'), '(correct)') ``` #### Problem description I read two date fields from two excel sheets. First date is one day off, second date is okay. I cannot see any reason for the difference in behavior. First date ('recalculated time') should be 2015-09-18. #### Expected Output ``` first date = 2015-09-18 (!!!) seconde date = 1978-03-16 (correct) ``` #### Output of ``pd.show_versions()`` INSTALLED VERSIONS ------------------ commit : None python : 3.7.3.final.0 python-bits : 64 OS : Linux OS-release : 4.19.0-6-amd64 machine : x86_64 processor : byteorder : little LC_ALL : None LANG : de_DE.UTF-8 LOCALE : de_DE.UTF-8 pandas : 0.25.3 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 18.1 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 s3fs : None scipy : None sqlalchemy : None tables : None xarray : None xlrd : 1.2.0 xlwt : None xlsxwriter : None None [28422_LZ.xlsx](https://github.com/pandas-dev/pandas/files/4116717/28422_LZ.xlsx) [test.xlsx](https://github.com/pandas-dev/pandas/files/4116718/test.xlsx)
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Bug: loc assignment results in wrong dtype
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5
2020-01-27T11:28:01Z
2020-02-01T23:20:37Z
2020-02-01T23:20:37Z
NONE
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Let's see output of this code snippet ```python df = pd.DataFrame({'id': ['A'], 'a': [1.2], 'b': [0.0], 'c': [-2.5]}) cols = ['a', 'b', 'c'] df.loc[:, cols] = df.loc[:, cols].astype('float32') print(df.dtypes) ``` #### Problem description In this code we expect columns `'a', 'b', 'c'` will have types `float32`. But in fact the result is: ``` >>> print(df.dtypes) id object a float32 b int64 c float32 dtype: object ``` Bug occurs when the value in column is close to integer. In other words, for `df = pd.DataFrame({'id': ['A'], 'a': [1.2], 'b': [1.0], 'c': [-2.5]})` behavior will be the same. However, if df has 2 rows or more the result is right: ``` >>> df = pd.DataFrame({'id': ['A', 'B'], 'a': [1.2, 0.55], 'b': [0.0, 0.0], 'c': [-2.5, 12.56]}) >>> df.loc[:, cols] = df.loc[:, cols].astype('float32') >>> df.dtypes id object a float32 b float32 c float32 dtype: object ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.6.5.final.0 python-bits : 64 OS : Linux OS-release : 4.19.6-200.fc28.x86_64 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 0.25.3 numpy : 1.17.4 pytz : 2018.4 dateutil : 2.7.5 pip : 19.2.3 setuptools : 41.6.0 Cython : 0.28.2 pytest : 3.5.1 hypothesis : None sphinx : 1.7.4 blosc : None feather : None xlsxwriter : 1.0.4 lxml.etree : 4.2.1 html5lib : 1.0.1 pymysql : None psycopg2 : 2.7.5 (dt dec pq3 ext lo64) jinja2 : 2.10 IPython : 6.4.0 pandas_datareader: None bs4 : 4.6.3 bottleneck : 1.2.1 fastparquet : None gcsfs : None lxml.etree : 4.2.1 matplotlib : 3.0.1 numexpr : 2.6.5 odfpy : None openpyxl : 2.5.3 pandas_gbq : None pyarrow : None pytables : None s3fs : None scipy : 1.1.0 sqlalchemy : 1.2.14 tables : 3.4.3 xarray : None xlrd : 1.1.0 xlwt : 1.3.0 xlsxwriter : 1.0.4 </details>
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Backport PR #31323 on branch 1.0.x (CI: Fix jedi upgrades causes deprecation warning)
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0
2020-01-27T12:28:59Z
2020-01-27T14:22:05Z
2020-01-27T14:22:04Z
NONE
null
Backport PR #31323: CI: Fix jedi upgrades causes deprecation warning
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CI Failing on IPython tab complete test
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2020-01-27T14:09:39Z
2020-01-27T14:14:49Z
2020-01-27T14:14:49Z
CONTRIBUTOR
null
https://dev.azure.com/pandas-dev/pandas/_build/results?buildId=26868&view=logs&j=a3a13ea8-7cf0-5bdb-71bb-6ac8830ae35c&t=add65f64-6c25-5783-8fd6-d9aa1b63d9d4 ``` ##[error]2 test(s) failed, 61943 test(s) collected. Skipping uploading of coverage data. =================================== FAILURES =================================== ______________ TestCategoricalWarnings.test_tab_complete_warning _______________ [gw1] linux -- Python 3.7.6 /home/vsts/miniconda3/envs/pandas-dev/bin/python self = <contextlib._GeneratorContextManager object at 0x7fec44a81210> type = None, value = None, traceback = None def __exit__(self, type, value, traceback): if type is None: try: > next(self.gen) E AssertionError: Caused unexpected warning(s): [('DeprecationWarning', DeprecationWarning('Deprecated since version 0.16.0. Use get_signatures()[...].params'), '/home/vsts/miniconda3/envs/pandas-dev/lib/python3.7/site-packages/jedi/cache.py', 111)] ../../../miniconda3/envs/pandas-dev/lib/python3.7/contextlib.py:119: AssertionError _____________________ TestIndex.test_tab_complete_warning ______________________ [gw0] linux -- Python 3.7.6 /home/vsts/miniconda3/envs/pandas-dev/bin/python self = <pandas.tests.indexes.test_base.TestIndex object at 0x7f6d1ff31850> ip = <IPython.core.interactiveshell.InteractiveShell object at 0x7f6d1ff31b90> @async_mark() async def test_tab_complete_warning(self, ip): # ***/issues/16409 pytest.importorskip("IPython", minversion="6.0.0") from IPython.core.completer import provisionalcompleter code = "import pandas as pd; idx = pd.Index([1, 2])" await ip.run_code(code) with tm.assert_produces_warning(None): with provisionalcompleter("ignore"): > list(ip.Completer.completions("idx.", 4)) pandas/tests/indexes/test_base.py:2418: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = <contextlib._GeneratorContextManager object at 0x7f6d1ebc7a50> type = None, value = None, traceback = None def __exit__(self, type, value, traceback): if type is None: try: > next(self.gen) E AssertionError: Caused unexpected warning(s): [('DeprecationWarning', DeprecationWarning('Deprecated since version 0.16.0. Use get_signatures()[...].params'), '/home/vsts/miniconda3/envs/pandas-dev/lib/python3.7/site-packages/jedi/cache.py', 111)] ../../../miniconda3/envs/pandas-dev/lib/python3.7/contextlib.py:119: AssertionError ``` taking a look now.
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TST/CLN: remove setup_method from test_dtypes
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2020-01-27T15:01:11Z
2020-02-05T23:12:11Z
2020-02-02T22:55:11Z
MEMBER
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Why [] operation on float index doesn't work the same way as int index?
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2020-01-27T15:24:28Z
2021-07-27T05:27:35Z
2021-07-27T05:27:35Z
CONTRIBUTOR
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#### Code Sample, a copy-pastable example if possible ```python >>> s1 = pd.Series(list('abcde'),index=[5,7,9,11,13]) >>> s2 = pd.Series(list('abcde'),index=[5.5,7.5,9.5,11.5,13.5]) >>> print(s1[2:]) >>> print(s2[2:]) 9 c 11 d 13 e dtype: object 5.5 a 7.5 b 9.5 c 11.5 d 13.5 e dtype: object ``` #### Problem description I'm a little confused with the [] operation on numerical index. It seems that when [] applied to the int index, it is compared with the exact position, whereas the [] operation on float is compared with the index's value. Thanks!
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555,650,519
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31,345
ENH: `Styler.highlight_null` to accept `subset` argument
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2020-01-27T15:28:22Z
2020-03-10T20:30:08Z
2020-03-10T20:30:08Z
CONTRIBUTOR
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#### Code Sample, a copy-pastable example if possible ```python import pandas as pd df = pd.DataFrame({"A": [0, None], "B": [0, None]}) df.style.highlight_null(null_color="red", subset=["A"]) ``` out: ``` --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-3-c4119d081571> in <module> ----> 1 df.style.highlight_null(null_color="red", subset=["A"]) TypeError: highlight_null() got an unexpected keyword argument 'subset' ``` #### Problem description Most of the `Styler` built-in methods support `subset` argument, except `highlight_null`. I think it would be nice if we make it consistent with `highlight_min` and `highlight_max` etc. This also improves the api completeness for missing values styling and formatting. [(as discussed here)](https://github.com/pandas-dev/pandas/pull/29118#discussion_r340733887) #### Expected Output ![Screenshot from 2020-01-27 23-16-43](https://user-images.githubusercontent.com/26521816/73186715-311c7780-415b-11ea-8535-f04a6bd6b613.png) #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.8.1.final.0 python-bits : 64 OS : Linux OS-release : 3.10.0-862.14.4.el7.x86_64 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 0.25.3 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 19.3.1 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 : 2.10.3 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 s3fs : None scipy : None sqlalchemy : None tables : None xarray : None xlrd : None xlwt : None xlsxwriter : None </details>
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TYP: core.arrays.boolean
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2020-01-27T15:46:34Z
2020-03-10T20:30:16Z
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CONTRIBUTOR
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As proposed in #31345 and as a follow-up PR for [#29118](https://github.com/pandas-dev/pandas/pull/29118#discussion_r340733887) - [x] closes #31345 - [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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read_sql routes sql query as table name snowflake-sqlalchemy
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#### Code Sample with [snowflake-sqlalchemy ](https://github.com/snowflakedb/snowflake-sqlalchemy) installed: ```python from sqlalchemy import create_engine import pandas as pd CONN_STRING='snowflake://user:password@account/database' engine=create_engine(CONN_STRING) conn=engine.connect() sql= 'SELECT COUNT(*) FROM "DATABASE_NAME"."SCHEMA_NAME"."TABLE_NAME"' ##this errors (stack below) r=pd.read_sql(sql) ## this does not r=pd.read_sql_query(sql) ``` stack: ``` Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python3.7/site-packages/pandas/io/sql.py", line 420, in read_sql pandas_sql.meta.reflect(only=[sql]) File "/usr/local/lib/python3.7/site-packages/sqlalchemy/sql/schema.py", line 4261, in reflect "in %r%s: (%s)" % (bind.engine, s, ", ".join(missing)) sqlalchemy.exc.InvalidRequestError: Could not reflect: requested table(s) not available in Engine(snowflake://ethan:***@yxxxxxx.us-east-1/REDACTED_DB_NAME): (SELECT COUNT(*) FROM "REDACTED_DB_NAME"."REDACTED_DB_SCHEMA"."REDACTED_DB_TABLE") ``` #### Problem description `read_sql` attempts to read sql queries as tables when running against snowflake. Calling `read_sql_query` is a workaround. looks like [this line](https://github.com/pandas-dev/pandas/blob/5c37a0b9caaed81ff3999d05b16be1303d184d77/pandas/io/sql.py#L415): ``` try: _is_table_name = pandas_sql.has_table(sql) except Exception: # using generic exception to catch errors from sql drivers (GH24988) _is_table_name = False ``` is incorrectly determining statements to be table names. #### Expected Output pd dataframe result of query. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.7.6.final.0 python-bits : 64 OS : Linux OS-release : 4.19.76-linuxkit machine : x86_64 processor : byteorder : little LC_ALL : None LANG : C.UTF-8 LOCALE : en_US.UTF-8 pandas : 0.25.3 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.0 pip : 19.3.1 setuptools : 44.0.0 Cython : None pytest : 5.3.0 hypothesis : None sphinx : 2.3.1 blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : 2.8.4 (dt dec pq3 ext lo64) jinja2 : 2.10.3 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 s3fs : None scipy : 1.4.1 sqlalchemy : 1.3.12 tables : None xarray : None xlrd : None xlwt : None xlsxwriter : None </details>
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2020-02-02T21:08:57Z
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#### Problem description It appears that there is some premature rounding happening in the `Timedelta` constructor that makes it so the unit-adjusted sums of the `days`, `seconds`, `microseconds` and `nanoseconds` attributes do not sum to the total number of nanoseconds. A fundamental assumption of the `datetime.timedelta` type (and breaking this assumption breaks Liskov substitutability) is that the total time difference at the precision of microseconds can be represented by summing up the unit-adjusted `days`, `seconds` and `microseconds` attributes, and it's how `datetime.total_seconds()` works. I believe that this is the root cause of issue #31043, which was "fixed" with what is essentially a workaround in PR #31155, as I mentioned in [this comment](https://github.com/pandas-dev/pandas/pull/31155#discussion_r370721655). At the moment the most obvious effect is that bug #31043 only is fixed for recent versions of `dateutil`, but presumably it will show up in other places where standard `datetime` arithmetic is being used on `pandas` timestamps. #### Code Sample, a copy-pastable example if possible ```python def to_ns(td): ns = td.days * 86400 ns += td.seconds ns *= 1000000 ns += td.microseconds ns *= 1000 ns += td.nanoseconds return ns td = timedelta(1552211999999999872, unit="ns") print(td.value) # 1552211999999999872 print(to_ns(td)) # 1552212000000000872 ``` #### Actual output: ``` 1552211999999999872 1552212000000000872 ``` #### Expected output ``` 1552211999999999872 1552211999999999872 ```
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1
2020-01-27T16:25:20Z
2020-09-13T20:22:37Z
2020-09-13T20:22:37Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python import numpy as np from pandas.core.reshape.util import cartesian_product dims = [np.arange(0, 22, dtype=np.int16) for i in range(12)] + [(np.arange(15128, dtype=np.int16)), ] cartesian_product(dims) # ValueError: negative dimensions are not allowed ``` #### Problem description This issue is similar to #9096, when performing a `groupby` over many columns with a large key space and invoking a reduction over one column, the solution is computed correctly but an error occurs when constructing the result's index with `MultiIndex.from_product`. The error occurs in `cartesian_product`, where very large signed integer arithmetic overflows. https://github.com/pandas-dev/pandas/blob/0c50950f2a7e32887eff6be5979f09772091e1de/pandas/core/reshape/util.py#L42-L54 The overflow at this point can be averted by using `np.uintp` instead of `np.intp` as the dtype for `fromiter`. Current code `cumprodX`: ``` array([ 22, 484, 10648, 234256, 5153632, 113379904, 2494357888, 54875873536, 1207269217792, 26559922791424, 584318301411328, 12855002631049216, -8443705008292528128], dtype=int64) ``` With `uintp` `cumprodX`: ``` array([ 22, 484, 10648, 234256, 5153632, 113379904, 2494357888, 54875873536, 1207269217792, 26559922791424, 584318301411328, 12855002631049216, 10003039065417023488], dtype=uint64) ``` Unfortunately, the calculation of `b` is converted to a `float64` automatically due to the real division at line 49, though this can be corrected by using floor division. Current code `b`: ``` array([4.54683594e+17, 2.06674361e+16, 9.39428913e+14, 4.27013142e+13, 1.94096883e+12, 8.82258558e+10, 4.01026617e+09, 1.82284826e+08, 8.28567391e+06, 3.76621542e+05, 1.71191610e+04, 7.78143681e+02, 1.00000000e+00]) ``` With floordiv `b`: ``` array([454683593882591976, 20667436085572362, 939428912980561, 42701314226389, 1940968828472, 88225855839, 4010266174, 182284826, 8285673, 376621, 17119, 778, 1], dtype=uint64) ``` Even worse, while the value of `b[i]` in `np.repeat` is a very large unsigned integer, passing it into `np.repeat` seems to still fail due to a sign error: ```python np.repeat(np.array(range(22), dtype=np.int16), 454683593882591976) ValueError Traceback (most recent call last) <ipython-input-83-c5f3bb52f270> in <module> ----> 1 np.repeat(np.array(range(22), dtype=np.int16), 454683593882591976) <__array_function__ internals> in repeat(*args, **kwargs) ...\lib\site-packages\numpy\core\fromnumeric.py in repeat(a, repeats, axis) 479 480 """ --> 481 return _wrapfunc(a, 'repeat', repeats, axis=axis) 482 483 ...\lib\site-packages\numpy\core\fromnumeric.py in _wrapfunc(obj, method, *args, **kwds) 59 60 try: ---> 61 return bound(*args, **kwds) 62 except TypeError: 63 # A TypeError occurs if the object does have such a method in its ValueError: negative dimensions are not allowed ``` Curiously enough, if you vary the array argument to `np.repeat`, while holding `b[i]` constant, the error changes: ```python np.repeat(np.array(range(22), dtype=np.int16), 454683593882591976) # ValueError: negative dimensions are not allowed np.repeat(np.array(range(20), dtype=np.int16), 454683593882591976) # ValueError: array is too big; `arr.size * arr.dtype.itemsize` is larger than the maximum possible size. np.repeat(np.array(range(2), dtype=np.int16), 454683593882591976) # MemoryError: Unable to allocate array with shape (909367187765183952,) and data type int16 ``` The issue is of course, I'm asking to create an array more than two times larger than the maximum value of `Py_ssize_t`, which would be impossible to index, even if I had the memory to allocate. There does not appear to be an ultimate solution within `pandas`, but the code leading into `numpy.repeat` still misbehaves. #### Expected Output The expected output would be the exceptionally large cross-product of all of the dimensions described by the raw keys above, or to receive an error indicating the key space is too large. Since creating an array larger than is physically possible is out of the question, some sort of error checking or warning in the documentation would be helpful. Would something like this be safe though? ```python lenX = np.fromiter((len(x) for x in X), dtype=np.intp) cumprodX = np.cumproduct(lenX) a = np.roll(cumprodX, 1) if np.any(cumprodX < 0): raise ValueError("Product space too large to allocate arrays!") ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.6.7.final.0 python-bits : 64 OS : Windows OS-release : 10 machine : AMD64 processor : Intel64 Family 6 Model 158 Stepping 10, GenuineIntel byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : None.None pandas : 0.25.3 numpy : 1.17.3 pytz : 2019.3 dateutil : 2.8.1 pip : 19.3.1 setuptools : 45.0.0.post20200113 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : 7.11.1 pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : None matplotlib : 3.1.2 numexpr : 2.7.1 odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None s3fs : None scipy : 1.3.1 sqlalchemy : None tables : 3.6.1 xarray : None xlrd : None xlwt : None xlsxwriter : None </details>
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MDU6SXNzdWU1NTU3MTUwOTk=
31,356
AssertionError creating array with StringDtype instead of StringDtype(), can we have a friendlier error message?
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1
2020-01-27T17:13:59Z
2021-07-27T05:28:59Z
null
NONE
null
The following fails with an `AssertionError` on pandas 1.0.0rc0: ```python pd.Series(["a", "b"], dtype=pd.StringDtype) ``` I wrote this by mistake — this works: ```python pd.Series(["a", "b"], dtype=pd.StringDtype()) ``` When running the former, I get a traceback with an AssertionError: ``` Traceback (most recent call last): File "/media/nas/x21324/miniconda3/envs/py37e/lib/python3.7/site-packages/pandas/core/construction.py", line 534, in _try_cast if is_integer_dtype(dtype): File "/media/nas/x21324/miniconda3/envs/py37e/lib/python3.7/site-packages/pandas/core/dtypes/common.py", line 827, in is_integer_dtype return _is_dtype_type(arr_or_dtype, classes_and_not_datetimelike(np.integer)) File "/media/nas/x21324/miniconda3/envs/py37e/lib/python3.7/site-packages/pandas/core/dtypes/common.py", line 1732, in _is_dtype_type return condition(np.dtype(arr_or_dtype).type) TypeError: data type not understood During handling of the above exception, another exception occurred: Traceback (most recent call last): File "mwe18.py", line 2, in <module> pd.Series(["a", "b"], dtype=pd.StringDtype) File "/media/nas/x21324/miniconda3/envs/py37e/lib/python3.7/site-packages/pandas/core/series.py", line 304, in __init__ data = sanitize_array(data, index, dtype, copy, raise_cast_failure=True) File "/media/nas/x21324/miniconda3/envs/py37e/lib/python3.7/site-packages/pandas/core/construction.py", line 438, in sanitize_array subarr = _try_cast(data, dtype, copy, raise_cast_failure) File "/media/nas/x21324/miniconda3/envs/py37e/lib/python3.7/site-packages/pandas/core/construction.py", line 562, in _try_cast subarr = array_type(arr, dtype=dtype, copy=copy) File "/media/nas/x21324/miniconda3/envs/py37e/lib/python3.7/site-packages/pandas/core/arrays/string_.py", line 180, in _from_sequence assert dtype == "string" AssertionError ``` Coming from numpy, I find it unconventional that the type ending in `dtype` is not itself a valid dtype, but rather a constructor for such a dtype. Therefore, I would consider that a friendlier error message could be in order (or maybe it should even work). I'm running pandas 1.0.0rc0 on Python 3.7.6. The full environment: <details> # packages in environment at /media/nas/x21324/miniconda3/envs/py37e: # # Name Version Build Channel _libgcc_mutex 0.1 conda_forge conda-forge _openmp_mutex 4.5 0_gnu conda-forge affine 2.3.0 py_0 conda-forge aggdraw 1.3.11 py37hc56bac0_0 conda-forge alabaster 0.7.12 py_0 conda-forge appdirs 1.4.3 pypi_0 pypi arrow-cpp 0.15.1 py37had5782a_4 conda-forge asciitree 0.3.3 py_2 conda-forge attrs 19.3.0 py_0 conda-forge awscli 1.17.8 py37_0 conda-forge babel 2.8.0 py_0 conda-forge backcall 0.1.0 py_0 conda-forge beautifulsoup4 4.8.2 py37_0 conda-forge behave 1.2.6 py37_1000 conda-forge bitstring 3.1.6 pypi_0 pypi bleach 3.1.0 py_0 conda-forge blosc 1.17.0 he1b5a44_1 conda-forge bokeh 1.4.0 py37_0 conda-forge boost-cpp 1.70.0 h8e57a91_2 conda-forge boto3 1.11.8 py_0 conda-forge botocore 1.14.8 py_0 conda-forge brotli 1.0.7 he1b5a44_1000 conda-forge bzip2 1.0.8 h516909a_2 conda-forge c-ares 1.15.0 h516909a_1001 conda-forge ca-certificates 2019.11.28 hecc5488_0 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MDU6SXNzdWU1NTU3Mjk0MjM=
31,357
Using matplotlib scatter legends?
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3
2020-01-27T17:41:20Z
2021-01-27T15:47:43Z
2021-01-27T15:47:43Z
NONE
null
Matplotlib now allows doing legends for categorical data in scatter: https://matplotlib.org/gallery/lines_bars_and_markers/scatter_with_legend.html Is that something that pandas could/should use? I feel like there's a tricky issue in deciding whether the color variable is categorical but basically matplotlib allows us now to treat the case and I'm not sure if treating all cases as continuous makes the most sense.
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BUG/REG: multiindex nested tuples with duplicates
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2020-01-27T18:21:58Z
2020-01-30T09:58:54Z
2020-01-28T01:59:32Z
MEMBER
null
- [x] closes #30892 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry there is an underlying problem with MultiIndex.get_loc that needs to get worked out, but that's going to take a while. This fixes the reported regression.
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555,785,949
MDExOlB1bGxSZXF1ZXN0MzY3NjY0OTM5
31,359
BUG: regression when applying groupby aggregation on categorical columns
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35
2020-01-27T19:32:45Z
2020-03-27T13:32:46Z
2020-01-29T20:20:53Z
MEMBER
null
- [ ] closes #31256 - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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555,796,223
MDExOlB1bGxSZXF1ZXN0MzY3NjczMzIw
31,360
Backport PR #31148: DOC: replace long table of contents on home page with main links
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0
2020-01-27T19:53:16Z
2020-01-27T20:35:22Z
2020-01-27T20:35:18Z
MEMBER
null
#31148
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555,801,569
MDExOlB1bGxSZXF1ZXN0MzY3Njc3Njc3
31,361
Avoid Index DeprecationWarning in Series getitem
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2020-01-27T20:04:03Z
2020-01-28T20:55:45Z
2020-01-28T20:55:41Z
CONTRIBUTOR
null
xref https://github.com/pandas-dev/pandas/issues/30867 cc @jorisvandenbossche. The alternative is to use a warnings filter inside SingleBlockManger.get_slice to filter the warning, but I think avoiding the warning in the first place is a bit nicer.
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31,362
Backport PR #30784: API: DataFrame.take always returns a copy
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1
2020-01-27T20:04:55Z
2020-01-28T06:00:10Z
2020-01-28T01:51:13Z
MEMBER
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Backport #30784
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#### Code Sample, a copy-pastable example if possible ```python # Your code here #problem: pandas to_numeric might give some errors when using coerce # it is adding digits at the end. import pandas as pd #minimal example data = [{'value': '.'}, {'value': '.'}, {'value': '.'}, {'value': '.'}, {'value': '243.164'}, {'value': '245.968'}, {'value': '249.585'}, {'value': '259.745'}, {'value': '265.742'}, {'value': '272.567'}] df = pd.DataFrame(data,columns=['value']) df.value = pd.to_numeric(df.value,errors='coerce') #looks as if all is good: df.value #but df.value[4] #this can be random: data2 = [{'value': '.'}, {'value': '.'}, {'value': '.'}, {'value': '.'}, {'value': '243.164'}, {'value': '245.968'}, {'value': '249.585'}, {'value': '259.745'}, {'value': '265.742'}, {'value': '272.567'}, {'value': '279.196'}, {'value': '280.366'}, {'value': '275.034'}, {'value': '271.351'}, {'value': '272.889'}, {'value': '270.627'}, {'value': '280.828'}, {'value': '290.383'}, {'value': '308.153'}, {'value': '319.945'}, {'value': '336.0'}, {'value': '344.09'}, {'value': '351.385'}, {'value': '356.178'}, {'value': '359.82'}, {'value': '361.03'}, {'value': '367.701'}, {'value': '380.812'}, {'value': '387.98'}, {'value': '391.749'}, {'value': '391.171'}, {'value': '385.97'}, {'value': '385.345'}, {'value': '386.121'}, {'value': '390.996'}, {'value': '399.734'}, {'value': '413.073'}, {'value': '421.532'}, {'value': '430.221'}, {'value': '437.092'}, {'value': '439.746'}, {'value': '446.01'}, {'value': '451.191'}, {'value': '460.463'}, {'value': '469.779'}, {'value': '472.025'}, {'value': '479.49'}, {'value': '474.864'}, {'value': '467.54'}, {'value': '471.978'}] #now 4, 36, and 47 are wrong, with different endings. df2 = pd.DataFrame(data2,columns=['value']) df2.value = pd.to_numeric(df2.value,errors='coerce') df2.value[[4,36,47]].to_list() ``` #### Problem description Current behavior: pandas to_numeric, when using errors='coerce' seem to randomly add decimals at the end of the number. #### Expected Output no decimals should be added at the end. #### 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 85 Stepping 4, GenuineIntel byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : None.None pandas : 0.25.3 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 : 7.6.1 pandas_datareader: 0.7.4 bs4 : 4.7.1 bottleneck : 1.2.1 fastparquet : None gcsfs : None lxml.etree : 4.3.4 matplotlib : 3.1.2 numexpr : 2.6.9 odfpy : None openpyxl : 2.6.2 pandas_gbq : None pyarrow : 0.15.1 pytables : None s3fs : None scipy : 1.2.1 sqlalchemy : 1.3.5 tables : 3.5.2 xarray : 0.12.3 xlrd : 1.2.0 xlwt : 1.3.0 xlsxwriter : 1.1.8 </details>
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2020-01-31T09:25:59Z
2020-01-31T04:18:02Z
MEMBER
null
pandas\core\reshape\reshape.py:378: error: "Index" has no attribute "levels"; maybe "nlevels"? pandas\core\reshape\reshape.py:381: error: "Index" has no attribute "codes" pandas\core\reshape\reshape.py:383: error: "Index" has no attribute "codes" pandas\core\reshape\reshape.py:436: error: Incompatible types in assignment (expression has type "_Unstacker", variable has type "partial[_Unstacker]") pandas\core\reshape\reshape.py:444: error: "partial[_Unstacker]" has no attribute "get_result" pandas\core\reshape\reshape.py:1000: error: Incompatible types in assignment (expression has type "None", variable has type "Index") pandas\core\reshape\reshape.py:1009: error: Incompatible types in assignment (expression has type "float", variable has type "int") pandas\core\reshape\reshape.py:1013: error: Need type annotation for 'sp_indices'
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555,837,443
MDU6SXNzdWU1NTU4Mzc0NDM=
31,368
Index name assignment resolution logic changes depending on whether DataFrame has any rows
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2
2020-01-27T21:15:57Z
2020-09-08T13:45:09Z
2020-09-08T13:45:09Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd def get_name_of_assigned_index(df_size, series_size): df = pd.DataFrame({}, index=pd.RangeIndex(df_size, name='df_index')) series = pd.Series(1.23, index=pd.RangeIndex(series_size, name='series_index')) df['series'] = series return df.index.name ``` #### Problem description `get_name_of_assigned_index(n, m)` returns `'df_index'` *unless* `n = 0`, in which case it returns `'series_index'`. I don't know which of these is necessarily the better behavior, but the resulting index name ought to be consistent regardless of how many - or few - rows are in the DataFrame. Subsequent operations may rely on expectations about that name, so this behavior, wherein the name changes as an unintuitive consequence of a rowless frame, could cause bugs. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit: None python: 3.6.7.final.0 python-bits: 64 OS: Linux OS-release: 4.3.5-smp-821.23.0.0 machine: x86_64 processor: byteorder: little LC_ALL: en_US.UTF-8 LANG: None LOCALE: en_US.UTF-8 pandas: 0.24.2 pytest: None pip: None setuptools: unknown Cython: None numpy: 1.16.4 scipy: 1.2.1 pyarrow: None xarray: None IPython: 2.0.0 sphinx: None patsy: 0.4.1 dateutil: 2.8.1 pytz: 2019.3 blosc: None bottleneck: None tables: 3.5.2 numexpr: 2.6.10dev0 feather: None matplotlib: 3.0.3 openpyxl: None xlrd: 1.2.0 xlwt: None xlsxwriter: None lxml.etree: None bs4: None html5lib: 1.0.1 sqlalchemy: None pymysql: None psycopg2: None jinja2: 2.10.3 s3fs: None fastparquet: None pandas_gbq: 0+unknown pandas_datareader: None gcsfs: None </details>
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555,843,695
MDU6SXNzdWU1NTU4NDM2OTU=
31,369
Center align the text and icons in documentation index
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2020-01-27T21:27:49Z
2020-01-28T16:18:19Z
2020-01-28T16:18:19Z
CONTRIBUTOR
null
At https://dev.pandas.io/docs/index.html, the alignment is slightly off. Especially notable for User Guide and API reference ![Screen Shot 2020-01-27 at 3 27 16 PM](https://user-images.githubusercontent.com/1312546/73215355-90f22e80-4119-11ea-9f6b-d9bedd1f332b.png) cc @jorisvandenbossche
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31,370
REF: IntervalIndex dispatch more methods to IntervalArray
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2020-01-27T21:43:20Z
2020-09-22T00:57:19Z
2020-09-22T00:57:19Z
MEMBER
null
I think we can de-duplicate some more code by a) noticing that IntervalArray._check_closed_matches is performing the same task as DatetimeLikeArrayMixin._check_compatible_with and b) dispatching to IntervalArray methods more. `_concat_same_dtype` could become (this could even go as the default in ExtensionIndex) ``` def _concat_same_dtype(self, to_concat, name): arr = type(self._data)._concat_same_type(to_concat) return type(self)._simple_new(arr, name=name) ``` `insert` could look like (also could go into ExtensionIndex): ``` def insert(self, loc, item): new_arr = type(self._data)._from_sequence([item]) to_concat = [self[:loc]._data, new_arr, self.loc[loc:]._data] res_values = type(self._data)._concat_same_type(to_concat) return type(self)._simple_new(res_values, name=self.name) ``` Tried this and it chokes on item=NaT. The integer-loc case for `delete` could look like: ``` def delete(self, loc): if is_integer(loc): to_concat = [self[:loc]._data, self[loc+1:]._data] arr = type(self._data)._concat_same_type(to_concat) return type(self)._simple_new(arr, name=self.name) ``` Probably others. Thoughts, cc @jschendel
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MDExOlB1bGxSZXF1ZXN0MzY3NzQ1ODI2
31,371
CLN: tighten what we pass to Index._shallow_copy
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2020-01-27T22:57:56Z
2020-01-28T04:20:23Z
2020-01-28T03:01:57Z
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31,372
Allow non-inplace option for `ndframe.update()`
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2020-01-27T23:03:27Z
2020-01-28T09:41:30Z
2020-01-28T09:40:46Z
NONE
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#### Code Sample, a copy-pastable example if possible ```python import pandas as pd s = pd.Series([1, 2, 3, 4, 5]) t = pd.Series([10, 11, 12], index=range(3, 6)) print(s.update(t).reindex([1, 2, 3, 4, 5])) ``` #### Problem description Obviously the previous doesn't work. `s.update(t)` is executed inplace, and doesn't return anything. I see no reasons why one shouldn't be able to call `update` and get a new object (for example to allow method chaining). The easiest way of implementing this is by allowing a parameter that makes the function return the updated object: ```python print(s.update(t, inplace=False).reindex([1, 2, 3, 4, 5])) ``` **I know there is already a plan about deprecating `inplace`, but I'm not sure it involves `update`. I guess that `update` was designed to be similar to the same method of a dict object.** **Update** Closed as it was solved in https://github.com/pandas-dev/pandas/issues/10730
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31,373
CLN: require extracting .values before expressions calls
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Backport PR #31290: BUG: Handle IntegerArray in pd.cut
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Backport PR #30860: REF: gradually move ExtensionIndex delegation to use inherit_names
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xref #31358
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- [x] closes #27522 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry I haven't actually performed the refactor(pandas.core -> pandas._core) yet so tests are failing because of the warnings.
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31,378
Backport PR #31238: REGR: Prevent indexes that aren't directly backedby numpy from entering libreduction code paths
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1
2020-01-28T03:59:09Z
2020-02-24T18:13:51Z
2020-01-28T12:17:47Z
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Backport #31238
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556,024,652
MDU6SXNzdWU1NTYwMjQ2NTI=
31,379
Pandas: cannot set a Timestamp with a non-timestamp
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2
2020-01-28T07:11:51Z
2020-01-29T05:11:35Z
2020-01-29T05:11:35Z
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I have a data-frame of the following order: https://imgur.com/a/fp2hKZe on which i ran the following code ```python for i in r.index[1:]: if (r.at[i, 'lbl'] == r.at[i-1, 'lbl']) & (r.at[i, 'lbl'] == 'f'): r.at[i, 'date'] = r.at[i, 'date'] - r.at[i-1, 'date'] elif r.at[i, 'lbl'] == 'f': r.at[i, 'date'] = r.at[i, 'date'] - r.at[i-1, 'date'] ``` #### Problem description When i run the same code for a much smaller data-set, it gives proper output ```python data = pd.DataFrame(data=[[101,'f',datetime.date(2017,12,28)], [101, 'f', datetime.date(2019,8,27)], [101,'m',datetime.date(2013,4,12)], [101,'m',datetime.date(2015,6,25)], [101, 'f', datetime.date(2016,8,16)], [102,'m', datetime.date(2019,8,15)], [102,'m',datetime.date(2019,6,25)]], columns=["TC", "lbl", "date"]) ``` ```python for i in data.index[1:]: if (data.at[i, 'lbl'] == data.at[i-1, 'lbl']) & (data.at[i, 'lbl'] == 'f'): data.at[i, 'date'] = data.at[i, 'date'] - data.at[i-1, 'date'] elif data.at[i, 'lbl'] == 'f': data.at[i, 'date'] = data.at[i, 'date'] - data.at[i-1, 'date'] ``` But when i change the data-set, i get The **ValueError** #### Expected Output   | TC | lbl | date -- | -- | -- | -- 0 | 101 | f | 2017-12-28 1 | 101 | f | 607 days, 0:00:00 2 | 101 | m | 2013-04-12 3 | 101 | m | 2015-06-25 4 | 101 | f | 418 days, 0:00:00 5 | 102 | m | 2019-08-15 6 | 102 | m | 2019-06-25 #### Output of ``pd.show_versions()`` INSTALLED VERSIONS ------------------ commit : None python : 3.7.4.final.0 python-bits : 64 OS : Linux OS-release : 5.0.0-32-generic machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_IN LOCALE : en_IN.ISO8859-1 pandas : 0.25.1 numpy : 1.17.2 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 : None pytables : None s3fs : None scipy : 1.3.1 sqlalchemy : 1.3.9 tables : 3.5.2 xarray : None xlrd : 1.2.0 xlwt : 1.3.0 xlsxwriter : 1.2.1
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556,026,501
MDExOlB1bGxSZXF1ZXN0MzY3ODYxOTU3
31,380
BUG: Timedelta components no longer rounded with high precision integers
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0
2020-01-28T07:16:54Z
2020-02-03T14:06:59Z
2020-02-02T21:08:57Z
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- [x] closes #31354 - [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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MDU6SXNzdWU1NTYwMzQ2NDY=
31,381
loc on Series returning scalar when result size is 1
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3
2020-01-28T07:38:23Z
2020-01-28T11:56:49Z
2020-01-28T11:56:23Z
NONE
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#### Code Sample ```python # Create a DataFrame with index and one Series df = pd.DataFrame({"id":[1,2,3,3],"val":["abcde","bbcde","cbcde","dbcde"]}) df.set_index("id",inplace=True) ``` Calling `.loc` when the result length is 2 returns a Series (as expected): ``` type(df['val'].loc[3]) ``` Output: ``` pandas.core.series.Series ``` Calling `.loc` when the result length is 1 returns a `str`: ```python # use .loc when the result length is 1: type(df['val'].loc[1]) ``` Output: ``` str ``` #### Problem description The fact that the same code returns different types causes inconsistencies. If I run `len` on the result, I would get 2 for `id=3` and 5 for `id=1` or `id=2`, since the string length is 5: ```python len(df['val'].loc[3]) ``` Output: ``` 2 ``` When calling `loc[1]`: ```python len(df['val'].loc[1]) ``` Output: ``` 5 ``` #### Expected Output `.loc` should return a Series regardless of the size. Otherwise this causes bugs when trying to evaluate the length of the output. ```python # Expected output: type(df['val'].loc[1]) ``` Output: ``` pandas.core.series.Series ``` ```python len(df['val'].loc[1]) ``` Output: ``` 1 ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.7.5.final.0 python-bits : 64 OS : Windows OS-release : 10 machine : AMD64 processor : Intel64 Family 6 Model 158 Stepping 10, GenuineIntel byteorder : little LC_ALL : None LANG : None LOCALE : None.None pandas : 0.25.3 numpy : 1.17.4 pytz : 2019.1 dateutil : 2.8.0 pip : 19.3.1 setuptools : 42.0.2.post20191203 Cython : None pytest : 5.3.2 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : 7.10.2 pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : None matplotlib : 3.1.1 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None s3fs : None scipy : 1.3.2 sqlalchemy : 1.3.12 tables : None xarray : None xlrd : 1.2.0 xlwt : None xlsxwriter : None </details>
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DOC: reduce long error tracebacks in 1.0 whatsnew + some clean-up
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0
2020-01-28T08:49:35Z
2020-01-28T13:07:49Z
2020-01-28T12:48:07Z
MEMBER
null
Made some of the ipython blocks into literal code blocks to avoid showing long error tracebacks (that only distract from the core text). Plus did a few other small formatting clean-ups, and combined 2 pyarrow related entries.
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556,088,926
MDExOlB1bGxSZXF1ZXN0MzY3OTEyODcx
31,383
Raise error in read_csv when arguments header and prefix both are not None
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11
2020-01-28T09:40:27Z
2020-02-03T16:13:05Z
2020-02-03T15:52:28Z
CONTRIBUTOR
null
- [x] closes #27394 - [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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2020-01-28T10:09:36Z
2020-04-27T09:01:00Z
2020-04-05T10:27:57Z
MEMBER
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31,385
pd.read_sas with chunksize option raises IndexError
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4
2020-01-28T10:09:38Z
2020-02-03T13:21:52Z
2020-02-03T13:21:52Z
NONE
null
Good morning, Using Python 3.6. My problem seems to be close to issue [#14734](https://github.com/pandas-dev/pandas/issues/14734) but with a different error type though. However, please forgive my lack of competence, but I am not able to understand 1. if my issue is really similar and 2. if the issue that seemed to surround some sas files has been solved or if there might still be some probleùs with some sas files (that i cannot provide for reasons detailed just below). I have read the rules about posting but i cannot attach a sample of my data or reproduce the entire error message as the data i am working on is located on a server without access to internet. I apologize for this inconvenience. I’ll try to reproduce most of what is requested however below. I am working with very big sas files (data on each job, hence millions of lines) and got memory error when i was trying to simple read them (they open fine in R or stata strangely). Therefore i searched and find the pandas.read_sas option to work with chunks of the data. My code is now the following: ```python import pandas as pd df_chunk = pd.read_sas(r'file.sas7bdat', chunksize=500) for chunk in df_chunk: chunk_list.append(chunk) ``` At this point i get the following error (I am reproducing it here manually as i cannot copy paste): ```python line 660, in _chunk_to_dataframe if self.column_formats[j] in const.sas_date_formats: IndexError: list index out of range ``` I am aware the exposition of my issue is truncated and probably incomplete but many thanks for any help you could provide, Axelle
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2020-01-31T15:00:18Z
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2
2020-01-28T11:03:21Z
2020-01-31T09:23:43Z
2020-01-31T05:23:52Z
MEMBER
null
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556,144,674
MDExOlB1bGxSZXF1ZXN0MzY3OTU5NDMy
31,388
ENH: truncate output of Groupby.groups
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1
2020-01-28T11:22:57Z
2020-02-25T17:12:40Z
2020-01-31T04:06:39Z
MEMBER
null
Resurrection of #24853. Have resolved conflicts and updated according to the last review it received. The original PR fixed some unrelated minor typos, so I've kept them in (and added a fix for another absolutely minor typo I'd noticed) - [x] closes #1135 - [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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556,182,883
MDU6SXNzdWU1NTYxODI4ODM=
31,389
Handle ExtensionArrays in cut
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3
2020-01-28T12:40:10Z
2020-05-13T02:53:32Z
null
CONTRIBUTOR
null
Followup to https://github.com/pandas-dev/pandas/pull/31290. Currently `pd.cut` doesn't play nicely with all extension arrays. To support them, I think we'll need one addition to the interface. We need an array of integers to pass to searchsorted in https://github.com/pandas-dev/pandas/blob/4edcc5541ff3f6470f5e3c083cb83136119e6f0c/pandas/core/reshape/tile.py#L394. I think the only requirement is that the integer-encoded values need to have the same ordering as the original values. (I forget the math term for this type of mapping). It doesn't matter what value is used for missing values, as long as it's distinct. We can't quite use `factorize(arr)[0]` since it doesn't have the ordering requirement.
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31,390
Backport PR #31382 on branch 1.0.x (DOC: reduce long error tracebacks in 1.0 whatsnew + some clean-up)
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0
2020-01-28T12:49:01Z
2020-01-28T13:33:41Z
2020-01-28T13:33:41Z
NONE
null
Backport PR #31382: DOC: reduce long error tracebacks in 1.0 whatsnew + some clean-up
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MDU6SXNzdWU1NTYyMTE1NDE=
31,391
SAS class comment mentions inexistant path
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2
2020-01-28T13:31:44Z
2020-01-29T08:15:00Z
2020-01-29T08:15:00Z
MEMBER
null
`pandas/asv_bench/benchmarks/io/sas.py` : > class SAS: > > params = ["sas7bdat", "xport"] > param_names = ["format"] > > def setup(self, format): > # Read files that are located in 'pandas/io/tests/sas/data' However, the files are in 'pandas/tests/io/sas/data'. EDIT: unrelated typo: there's lots of places in the codebase that use "rather then" instead of "rather than". As this is also a minor typo that doesn't affect any code, I think it'd be OK to address both in the same pull request
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DOC: Fix image alignment
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0
2020-01-28T15:06:31Z
2020-01-28T16:18:20Z
2020-01-28T16:18:20Z
CONTRIBUTOR
null
Closes #31369 ![Screen Shot 2020-01-28 at 9 02 54 AM](https://user-images.githubusercontent.com/1312546/73275908-74073b00-41ad-11ea-878a-0144ba558f3f.png)
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31,393
Backport PR #29393 on branch 1.0.x (BUG: GH25495 incorrect dtype when using .loc to set Categorical value for column in 1-row DataFrame)
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0
2020-01-28T15:29:56Z
2020-01-28T16:00:40Z
2020-01-28T16:00:40Z
NONE
null
Backport PR #29393: BUG: GH25495 incorrect dtype when using .loc to set Categorical value for column in 1-row DataFrame
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31,394
Backport PR #31392 on branch 1.0.x (DOC: Fix image alignment)
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0
2020-01-28T16:18:32Z
2020-01-28T17:56:58Z
2020-01-28T17:56:57Z
NONE
null
Backport PR #31392: DOC: Fix image alignment
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GH31391 - Fixed typos and fixed inexistant path in a SAS class comment
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5
2020-01-28T17:15:03Z
2020-01-29T01:48:35Z
2020-01-29T01:48:26Z
CONTRIBUTOR
null
Simple change: just fixed some typos and incorrect path as reported in #31391
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TypeError when using 'comment=...' in read_csv from a file
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2
2020-01-28T17:18:33Z
2020-03-03T03:02:23Z
2020-03-03T03:02:23Z
NONE
null
#### Code Sample Given a data file `data.csv` with a line that is commented out: ```csv +1.280000e+002,-4.078996e+001 +2.560000e+002,-5.155923e+001 # +3.840000e+002,-7.221378e+001 +5.120000e+002,-7.918677e+001 +6.400000e+002,-7.919656e+001 ``` ```python import pandas as pd pd.read_csv('data.csv', sep=None, index_col=0, header=None, engine="python", comment='#') ``` #### Problem description It raises a `TypeError` when using the `comment` parameter: <details> <summary>TypeError</summary> ```python TypeError Traceback (most recent call last) <ipython-input-17-c89b3c3e691f> in <module> ----> 1 pd.read_csv('data.csv', sep=None, comment='#') ~/.local/share/virtualenvs/openqlab/lib/python3.8/site-packages/pandas/io/parsers.py in parser_f(filepath_or_buffer, sep, delimiter, header, names, index_col, usecols, squeeze, prefix, mangle_dupe_cols, dtype, engine, converters, true_values, false_values, skipinitialspace, skiprows, skipfoote r, nrows, na_values, keep_default_na, na_filter, verbose, skip_blank_lines, parse_dates, infer_datetime_format, keep_date_col, date_parser, dayfirs t, cache_dates, iterator, chunksize, compression, thousands, decimal, lineterminator, quotechar, quoting, doublequote, escapechar, comment, encodin g, dialect, error_bad_lines, warn_bad_lines, delim_whitespace, low_memory, memory_map, float_precision) 683 ) 684 --> 685 return _read(filepath_or_buffer, kwds) 686 687 parser_f.__name__ = name ~/.local/share/virtualenvs/openqlab/lib/python3.8/site-packages/pandas/io/parsers.py in _read(filepath_or_buffer, kwds) 455 456 # Create the parser. --> 457 parser = TextFileReader(fp_or_buf, **kwds) 458 459 if chunksize or iterator: ~/.local/share/virtualenvs/openqlab/lib/python3.8/site-packages/pandas/io/parsers.py in __init__(self, f, engine, **kwds) 893 self.options["has_index_names"] = kwds["has_index_names"] 894 --> 895 self._make_engine(self.engine) 896 897 def close(self): ~/.local/share/virtualenvs/openqlab/lib/python3.8/site-packages/pandas/io/parsers.py in _make_engine(self, engine) 1145 ' "python-fwf")'.format(engine=engine) 1146 ) -> 1147 self._engine = klass(self.f, **self.options) 1148 1149 def _failover_to_python(self): ~/.local/share/virtualenvs/openqlab/lib/python3.8/site-packages/pandas/io/parsers.py in __init__(self, f, **kwds) 2297 # Set self.data to something that can read lines. 2298 if hasattr(f, "readline"): -> 2299 self._make_reader(f) 2300 else: 2301 self.data = f ~/.local/share/virtualenvs/openqlab/lib/python3.8/site-packages/pandas/io/parsers.py in _make_reader(self, f) 2427 self.pos += 1 2428 self.line_pos += 1 -> 2429 sniffed = csv.Sniffer().sniff(line) 2430 dia.delimiter = sniffed.delimiter 2431 if self.encoding is not None: /usr/lib64/python3.8/csv.py in sniff(self, sample, delimiters) 179 180 quotechar, doublequote, delimiter, skipinitialspace = \ --> 181 self._guess_quote_and_delimiter(sample, delimiters) 182 if not delimiter: 183 delimiter, skipinitialspace = self._guess_delimiter(sample, /usr/lib64/python3.8/csv.py in _guess_quote_and_delimiter(self, data, delimiters) 220 r'(?:^|\n)(?P<quote>["\']).*?(?P=quote)(?:$|\n)'): # ".*?" (no delim, no space) 221 regexp = re.compile(restr, re.DOTALL | re.MULTILINE) --> 222 matches = regexp.findall(data) 223 if matches: 224 break TypeError: expected string or bytes-like object ``` </details> Without the comment in the data file and without the parameter `comment='#'` everything works as expected. **It seems that `sep=None` ist the problem here.** When using `sep=','` it works. But in our case, the import is part of a general importer that should accept a variety of different files. Thus, we must use `sep=None`. #### Expected Output I would expect the following output: ```python Out[18]: 1 0 128.0 -40.78996 256.0 -51.55923 512.0 -79.18677 640.0 -79.19656 [4 rows x 1 columns] ``` #### Output of ``pd.show_versions()`` <details> <summary>Details</summary> INSTALLED VERSIONS ------------------ commit : None python : 3.8.1.final.0 python-bits : 64 OS : Linux OS-release : 5.4.13-201.fc31.x86_64 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : de_DE.UTF-8 LOCALE : de_DE.UTF-8 pandas : 0.25.3 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 19.3.1 setuptools : 42.0.2 Cython : None pytest : 5.3.2 hypothesis : None sphinx : 2.3.1 blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : 7.11.1 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 : 1.4.1 sqlalchemy : None tables : None xarray : None xlrd : None xlwt : None xlsxwriter : None </details>
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MDExOlB1bGxSZXF1ZXN0MzY4MTQ5MDI3
31,397
TYP: Annotate
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0
2020-01-28T17:53:50Z
2020-01-31T04:10:15Z
2020-01-31T03:34:57Z
MEMBER
null
AFAICT having the more specific annotations for the Index subclasses _data attribute is a blocker for a bunch of other annotations.
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556,385,260
MDU6SXNzdWU1NTYzODUyNjA=
31,398
NTile function
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2020-01-28T18:21:05Z
2020-03-06T23:10:47Z
2020-03-06T23:09:22Z
NONE
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#### Problem description I've investigated on pandas a `ntile` operation alternative. I just found `qcut` but it seems there is a difference between them (at least I could have the same results I expected). for more details about `NTile`[3] : > NTILE() function allows you to divide ordered rows in the partition into a specified number of ranked groups as equal size as possible. These ranked groups are called buckets. > The NTILE() function assigns each group a bucket number starting from 1. For each row in a group, the NTILE() function assigns a bucket number representing the group to which the row belongs. I have locally a python version of this function, is this something I could open a PR to pandas? if yes, I would be very happy to work on this PR. any feedback and/or guidance would be very appreciated. some references about ntile: [1] https://docs.oracle.com/cd/B19306_01/server.102/b14200/functions101.htm [2] https://www.sqlservertutorial.net/sql-server-window-functions/sql-server-ntile-function/ [3]https://www.postgresqltutorial.com/postgresql-ntile-function/ thanks!
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MDExOlB1bGxSZXF1ZXN0MzY4MTg3MDky
31,399
PERF: avoid is_bool_indexer check where possible
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8
2020-01-28T19:27:47Z
2020-02-04T16:16:12Z
2020-02-04T08:05:27Z
MEMBER
null
xref #30349, not a lot of ground to pick up here, but we can avoid a few calls
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read_csv error for a long entry
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2020-01-28T19:30:31Z
2020-01-28T21:10:47Z
2020-01-28T21:10:47Z
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#### Code Sample, a copy-pastable example if possible ```python df = pd.read_csv(fileName, delimiter='\t', comment='#', skip_blank_lines=True) ``` #### Problem description After reading a csv file, all the entries after a particular column in only one row shows as 'na', not the real value. This is due to the character length (469 including spaces) in that particular column entry as removing some characters do load the data properly. Is there any way to load the file properly? I don't mind truncating each entry not to cause this issue. Thanks, Segun
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MDExOlB1bGxSZXF1ZXN0MzY4MTg4NDAw
31,401
BUG: preserve object dtype for Index set ops
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0
2020-01-28T19:30:54Z
2020-02-02T23:09:41Z
2020-02-02T22:56:52Z
MEMBER
null
I'd be fine with coercing if we did it consistently, but ATM we behave differently for monotonic-increasing vs otherwise.
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CLN: remove maybe_box
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0
2020-01-28T20:06:28Z
2020-01-31T04:13:19Z
2020-01-31T03:33:46Z
MEMBER
null
Recently removed the last usaged from TDI/DTI.
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Backport PR #31361 on branch 1.0.x (Avoid Index DeprecationWarning in Series getitem)
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2020-01-28T20:55:53Z
2020-01-28T22:17:23Z
2020-01-28T22:17:23Z
NONE
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Backport PR #31361: Avoid Index DeprecationWarning in Series getitem
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Add pandas blog to feed
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5
2020-01-28T21:10:39Z
2020-01-29T17:34:38Z
2020-01-29T17:34:35Z
CONTRIBUTOR
null
I don't think this needs to be backported.
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Backport PR #31136 on branch 1.0.x (COMPAT: Return NotImplemented for subclassing)
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2020-01-28T21:14:23Z
2020-01-28T22:17:03Z
2020-01-28T22:17:03Z
NONE
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Backport PR #31136: COMPAT: Return NotImplemented for subclassing
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31,406
REF: consolidate DTI/TDI/PI get_value in ExtensionIndex, associated cleanups
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3
2020-01-28T21:50:47Z
2020-02-02T23:12:40Z
2020-02-02T22:52:06Z
MEMBER
null
@jschendel does the holds_integer change for IntervalIndex make sense? @jreback is this a correct usage of self.holds_integer() as meaning "we only fall back to positional indexing if not self.holds_integer()"
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556,528,317
MDU6SXNzdWU1NTY1MjgzMTc=
31,407
CI: revert the warning change once IPython updates
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3
2020-01-28T22:49:21Z
2021-02-02T17:55:58Z
null
MEMBER
null
A couple days ago, there was a CI broken caused by the latest jedi release, and back then, made a patch to catch the warning. Ideally, after ipython updates and fixes the deprecated code, then the warning should be removed, and we should be able to revert the change in #31323 FYI, I created an issue on IPython: https://github.com/ipython/ipython/issues/12102
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MDExOlB1bGxSZXF1ZXN0MzY4MzA3NTQy
31,408
REF: docstrings that dont need to go into shared_docs
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3
2020-01-28T23:54:55Z
2020-01-31T15:50:08Z
2020-01-31T14:47:28Z
MEMBER
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MDExOlB1bGxSZXF1ZXN0MzY4MzM4MDMy
31,409
PERF/CLN: float-to-int casting
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6
2020-01-29T02:13:52Z
2020-02-02T23:16:45Z
2020-02-02T22:50:48Z
MEMBER
null
using float.is_integer is apparently much faster than casting and checking equality, especially for values between int32max and int64max (anecdotal based on small sample size) ``` cast1 = com.cast_scalar_indexer_master cast2 = com.cast_scalar_indexer_PR def cast3(key): # Effectively what we have in _maybe_cast_indexer in master if lib.is_float(key): try: ckey = int(key) if ckey == key: key = ckey except (OverflowError, ValueError, TypeError): pass return key key1 = np.float64(17179869184.0) key2 = float(key1) * 2**30 key3 = np.float64(np.iinfo(np.int64).max) In [87]: for func in [cast1, cast2, cast3]: ...: for key in [key1, key2, key3]: ...: %timeit func(key) ...: 647 ns ± 3.71 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each) 559 ns ± 27.7 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each) 1.98 µs ± 19.7 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each) 360 ns ± 4.1 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each) 353 ns ± 3.11 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each) 377 ns ± 6.54 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each) 568 ns ± 3.92 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each) 445 ns ± 15 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each) 1.91 µs ± 36.7 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each) ``` The middle three timeit results are the ones we get from this PR.
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Cross tabulations for categorical data doesn't work as the way expected in the guide
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2020-01-29T03:20:22Z
2020-04-27T05:33:25Z
2020-04-27T05:33:25Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python In [73]: foo = pd.Categorical(['a', 'b'], categories=['a', 'b', 'c']) In [74]: bar = pd.Categorical(['d', 'e'], categories=['d', 'e', 'f']) In [75]: pd.crosstab(foo, bar) Out[75]: col_0 d e row_0 a 1 0 b 0 1 ``` #### Problem description In the latest [user guide](https://dev.pandas.io/docs/user_guide/reshaping.html#cross-tabulations), it says "Any input passed containing Categorical data will have all of its categories included in the cross-tabulation, even if the actual data does not contain any instances of a particular category.". But why the example doesn't work like this way? (lack of the row 'c' and column 'f') Thanks !
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COMPAT: dont pass dtype to datetime64
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0
2020-01-29T03:34:46Z
2020-01-29T15:51:10Z
2020-01-29T15:12:06Z
MEMBER
null
Hopefully fixes npdev build
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31,412
CLN: Replace '.format' with f-strings in some test files #29547
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4
2020-01-29T05:07:38Z
2020-02-02T03:06:03Z
2020-01-31T04:02:40Z
CONTRIBUTOR
null
Updates the below 2 test files to use f-strings (fast and preferred) instead of '.format' (old and slow) 1) pandas/tests/reshape/test_reshape.py 2) pandas/tests/scalar/period/test_period.py For more details on the issue, refer: https://github.com/pandas-dev/pandas/issues/29547 - [x] tests passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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MDU6SXNzdWU1NTY2NTc5MjI=
31,413
Series.append(DataFrame) should throw TypeError
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2
2020-01-29T06:06:21Z
2020-03-04T14:17:16Z
2020-03-04T14:17:16Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python >>> import pandas as pd >>> pd.__version__ '1.0.0rc0+233.gec0996c67' >>> df = pd.DataFrame({'A':[1,2]}) >>> df.A.append(df) 0 A 0 1.0 NaN 1 2.0 NaN 0 NaN 1.0 1 NaN 2.0 ``` #### Problem description The behavior of append is the same as it is in 0.25.3 when a DataFrame is appended to Series. But it should actually throw a TypeError when passed a DataFrame. We clearly document that the elements passed to append should be Series or list/tuple of Series. Also according to [this](https://github.com/pandas-dev/pandas/issues/30975), a TypeError seems appropriate. The change can be implemented for 1.0.1 or 1.1 after [this](https://github.com/pandas-dev/pandas/pull/31036#issuecomment-577248825) discussion. #### Expected Output ```python >>> df = pd.DataFrame({'A':[1, 2]}) >>> df.A.append([df]) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "D:\Work\Git projects\pandas\pandas\core\series.py", line 2572, in append raise TypeError(msg) TypeError: to_append should be a Series or list/tuple of Series, got DataFrame ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : ec0996c6751326eed17a0bb456fe1c550689a618 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 : 1.0.0rc0+233.gec0996c67.dirty numpy : 1.17.0 pytz : 2018.9 dateutil : 2.8.0 pip : 19.3.1 setuptools : 44.0.0.post20200106 Cython : 0.29.14 pytest : 4.3.1 hypothesis : 5.1.5 sphinx : 1.8.5 blosc : None feather : 0.4.0 xlsxwriter : 1.1.5 lxml.etree : 4.3.2 html5lib : 1.0.1 pymysql : 0.9.3 psycopg2 : None jinja2 : 2.10 IPython : 7.4.0 pandas_datareader: None bs4 : 4.6.3 bottleneck : 1.2.1 fastparquet : None gcsfs : None lxml.etree : 4.3.2 matplotlib : 3.0.3 numexpr : 2.6.9 odfpy : None openpyxl : 2.6.1 pandas_gbq : None pyarrow : 0.15.1 pytables : None pytest : 4.3.1 pyxlsb : None s3fs : None scipy : 1.4.1 sqlalchemy : 1.3.1 tables : 3.5.1 tabulate : 0.8.6 xarray : None xlrd : 1.2.0 xlwt : 1.3.0 xlsxwriter : 1.1.5 numba : 0.43.1 </details>
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556,738,512
MDU6SXNzdWU1NTY3Mzg1MTI=
31,414
Cannot replace all occurences of infs and nans to None with a single df.replace
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2020-01-29T09:29:26Z
2020-04-25T12:41:44Z
null
NONE
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#### Example code ```python >>> df = pd.DataFrame( ... {'foo':[ ... np.nan, ... np.inf, ... 1.1, ... 2.2 ... ], ... 'bar':[ ... 1, ... -np.inf, ... 2.1, ... 3.2 ... ] ... }) >>> df foo bar 0 NaN 1.0 1 inf -inf 2 1.1 2.1 3 2.2 3.2 >>> df.replace({np.nan: None, -np.inf:None, np.inf:None}) foo bar 0 NaN 1.0 1 NaN NaN 2 1.1 2.1 3 2.2 3.2 >>> ``` #### Problem description When trying to replace all occurrences of `NaN`s and `Inf`s to `None`s the resulting dataframe simply contains 'NaNs' for every occurrence, retaining the dtype of `float64` rather than the expected `object`. A work around is to simply issue the replace again with only `np.nan` to `None`. This behavior was discovered when trying to convert the contents of a dataframe containing `Inf`s, and `NaN`s to `None`s in preparation for JSON compliant output via a dictionary for compatibility with third party tools rather than directly through panda's to_json() method (which admittedly would make this process unnecessary as it produces the compliant output already) I strongly suspect this problem is related to inconsistencies outlined here: https://github.com/pandas-dev/pandas/issues/29024 #### Expected Output I would expect a column type of `object` with `None`s in place as I see when replacing only NaNs. #### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] INSTALLED VERSIONS ------------------ commit : None python : 3.8.1.final.0 python-bits : 64 OS : Linux OS-release : 5.4.13-arch1-1 machine : x86_64 processor : byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.0.0rc0+233.gec0996c675 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 19.3 setuptools : 44.0.0 Cython : 0.29.14 pytest : None hypothesis : None sphinx : 2.2.1 blosc : None feather : None xlsxwriter : None 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 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : 4.4.2 matplotlib : 3.1.2 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pytest : None pyxlsb : None s3fs : None scipy : 1.4.1 sqlalchemy : 1.3.12 tables : None tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : None </details>
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