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38,019
TST/REF: collect Index setops tests
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2020-11-23T16:13:30Z
2020-11-24T15:26:27Z
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748,946,742
MDExOlB1bGxSZXF1ZXN0NTI1ODQ5OTQ3
38,020
BUG: algos.isin numeric vs datetimelike
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2020-11-23T16:28:22Z
2020-11-25T22:11:40Z
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749,013,241
MDExOlB1bGxSZXF1ZXN0NTI1OTA0MDEx
38,021
ENH: support 2D in DatetimeArray._from_sequence
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2020-11-23T18:01:58Z
2020-12-17T15:44:46Z
2020-12-17T13:52:44Z
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Broken off from a branch that fixes #37682, the constraint on which is that _validate_setitem_value needs to handle 2D.
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STYLE use types_or in pre-commit
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2020-11-23T19:28:22Z
2020-12-16T00:46:50Z
2020-12-16T00:46:50Z
MEMBER
null
[pre-commit 2.9 adds support for types_or](https://github.com/pre-commit/pre-commit/releases/tag/v2.9.0), which would help clear up some of the less readable regexes like `\.(py|pyx|rst)$`, replacing them with `types_or: [python, cython, rst]`
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38,023
QST: Pandas without MKL?
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1
2020-11-23T19:34:04Z
2020-11-24T00:22:18Z
2020-11-24T00:22:08Z
NONE
null
I build a small application that uses `pandas` and use `pyinstaller` to build `.exe` file. Since the default `numpy` uses MKL, which results in very large folder. I use `conda install conda-forge nomkl numpy` to install numpy without MKL. Then I install pandas using `conda install pandas`. The program works well. However, after I convert the code to `.exe` file. I encounter the following error from pandas: ``` Traceback (most recent call last): File "\\VBoxSvr\twitterscraper\twitter_scraper_tweepy_Vader_V4.py", line 21, in <module> File "c:\users\XXXX\miniconda3\lib\site-packages\PyInstaller\loader\pyimod03_importers.py", line 493, in exec_module File "pandas\__init__.py", line 16, in <module> ImportError: Unable to import required dependencies: numpy: cannot import name '_mklinit' from partially initialized module 'mkl' (most likely due to a circular import) (C:\Users\XXXX\Documents\twitterscraper\dist\twitter_scraper_tweepy_Vader_V4\mkl\__init__.pyc) [2136] Failed to execute script twitter_scraper_tweepy_Vader_V4 ``` I'm not sure why, but it seems that pandas still requires MKL. I wonder if there is a version of pandas that does not require MKL? I also tried to install pandas using `conda install conda-forge::blas=*=openblas pandas`. The problem remains. Info of my system: * OS: Win10 * Python: 3.8.3 (installed from Miniconda) * Numpy: 1.19.4 (installed from `conda-forge` together with `nomkl` to use blas. * Pandas: 1.1.3 (installed using `conda install pandas` or `conda install conda-forge::blas=*=openblas pandas`)
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749,104,785
MDExOlB1bGxSZXF1ZXN0NTI1OTc4MDEx
38,024
Revert "REF: back IntervalArray by a single ndarray (#37047)"
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6
2020-11-23T20:32:49Z
2020-11-24T19:22:32Z
2020-11-24T17:35:58Z
MEMBER
null
This reverts commit 9cb372376fc78aa66e2559de919592007b74cfaa. See discussion in https://github.com/pandas-dev/pandas/pull/37047/ @jbrockmendel can you give this a check? (there were already several conflicts)
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749,112,171
MDU6SXNzdWU3NDkxMTIxNzE=
38,025
BUG: Setting a MultiIndex through set_index where one of the columns contains exclusively NaTs converts them to NaNs
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2
2020-11-23T20:44:06Z
2021-09-29T13:28:07Z
2021-09-29T13:28:07Z
NONE
null
- [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- ```python import pandas as pd df1 = pd.DataFrame({ "date": ["2015-03-22", pd.NaT], "a": ["a", "aa"], "b": [2, 3] }) df1 = df1.set_index("date") # works as intended print(df1) df1 = df1.reset_index() df1 = df1.set_index(["date", "a"]) # works as intended print(df1) df2 = pd.DataFrame({ "date": [pd.NaT, pd.NaT], "a": ["a", "aa"], "b": [2, 3] }) df2 = df2.set_index("date") # works as intended print(df2) df2 = df2.reset_index() df2 = df2.set_index(["date", "a"]) # date will be converted to NaN here print(df2) df3 = pd.DataFrame({ "date": [pd.NaT, pd.NaT], "a": ["a", "aa"], "b": [2, 3] }) # working alternative, but at what cost df3.index = pd.MultiIndex.from_frame(df3.loc[:, ["date", "a"]]) df3 = df3.drop(columns=["date", "a"]) print(df3) df3.reset_index() # ValueError thrown here ``` python 3.8.3 pandas 1.1.3 This bug will not occur if the column in question contains any values other than NaT, nor if setting a single column as the index. With df1, everything works as expected. In df2 (identical to df1 except "date" contains exclusively pd.NaT values) when set_index is used with more than one column, the date level of the resulting MultiIndex has now been converted to NaNs. With df3 (identical to df2), the use of set_index is circumvented and the MultiIndex is set as intended, however this now leads to another issue where attempting to use reset_index will throw "ValueError: cannot convert float NaN to integer".
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749,193,070
MDExOlB1bGxSZXF1ZXN0NTI2MDUwMzE2
38,026
Bug in loc raising KeyError when MultiIndex columns has only one level
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2
2020-11-23T23:07:42Z
2020-11-25T18:50:52Z
2020-11-25T03:18:36Z
MEMBER
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- [x] closes #29749 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry @jbrockmendel I think we should check for MultiIndex instead of level number here
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the .corr method filter the columns to only keep the numerical columns before apply any corr calclation.
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2020-11-24T04:09:08Z
2021-08-14T05:49:55Z
2021-08-14T05:49:54Z
NONE
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https://github.com/pandas-dev/pandas/blob/67a3d4241ab84419856b84fc3ebc9abcbe66c6b3/pandas/core/frame.py#L8127 the .corr method filter the columns to only keep the numerical columns before apply any corr calclation. one issue with that is if I would like to apply a callable method _cramer_v to calc the correlation between categorical features, the .corr will skip it. I think for callable method, it should not skip any type of columns
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749,330,860
MDU6SXNzdWU3NDkzMzA4NjA=
38,032
BUG: series construction from dict of Timedelta scalar doesn't work
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5
2020-11-24T04:28:02Z
2020-12-12T23:23:56Z
2020-12-12T23:23:56Z
MEMBER
null
Construction of `Series` from a dictionary of scalars sometimes fails: #### Code Sample, a copy-pastable example ```python In [31]: import pandas as pd ...: import pandas._testing as tm ...: ...: td = pd.Timedelta(nanoseconds=500) ...: ser = pd.Series({"a": td}) ...: expected = pd.Series(td, index=["a"], dtype="timedelta64[ns]") ...: ...: tm.assert_series_equal(ser, expected) --------------------------------------------------------------------------- AssertionError Traceback (most recent call last) <ipython-input-31-a9c6a6312101> in <module> 6 expected = pd.Series(td, index=["a"], dtype="timedelta64[ns]") 7 ----> 8 tm.assert_series_equal(ser, expected) [... skipping hidden 1 frame] ~/repos/pandas/pandas/_testing.py in assert_extension_array_equal(left, right, check_dtype, index_values, check_less_precise, check_exact, rtol, atol) 1243 # Avoid slow object-dtype comparisons 1244 # np.asarray for case where we have a np.MaskedArray -> 1245 assert_numpy_array_equal( 1246 np.asarray(left.asi8), np.asarray(right.asi8), index_values=index_values 1247 ) [... skipping hidden 1 frame] ~/repos/pandas/pandas/_testing.py in _raise(left, right, err_msg) 1155 diff = diff * 100.0 / left.size 1156 msg = f"{obj} values are different ({np.round(diff, 5)} %)" -> 1157 raise_assert_detail(obj, msg, left, right, index_values=index_values) 1158 1159 raise AssertionError(err_msg) ~/repos/pandas/pandas/_testing.py in raise_assert_detail(obj, message, left, right, diff, index_values) 1085 msg += f"\n[diff]: {diff}" 1086 -> 1087 raise AssertionError(msg) 1088 1089 AssertionError: numpy array are different numpy array values are different (100.0 %) [index]: [a] [left]: [500] [right]: [0] ``` Ran on 1.2 master
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749,339,692
MDU6SXNzdWU3NDkzMzk2OTI=
38,033
TST: dataframe constructor should preserve order with standard Python dicts
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6
2020-11-24T04:51:48Z
2020-12-02T03:04:37Z
2020-12-02T03:04:37Z
MEMBER
null
We have a couple of dataframe tests (xref #13304) related to column ordering when constructed from an `OrderedDict`: https://github.com/pandas-dev/pandas/blob/e4cf3abe0020aa801950e0383fffc13ee9703456/pandas/tests/frame/test_constructors.py#L1250-L1288 As of [PEP 468](https://www.python.org/dev/peps/pep-0468/) standard dictionaries are ordered so these tests should also work with `OrderedDict` replaced by `dict`
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749,350,264
MDExOlB1bGxSZXF1ZXN0NTI2MTgwMDc4
38,034
ENH: preserve RangeIndex in factorize
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4
2020-11-24T05:17:15Z
2020-11-26T22:30:49Z
2020-11-26T22:24:31Z
MEMBER
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- [ ] closes #xxxx - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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Backport PR #37986 on branch 1.1.x: REGR: fix inplace operations for EAs with non-EA arg
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1
2020-11-24T09:36:48Z
2020-11-25T10:53:11Z
2020-11-25T10:52:56Z
MEMBER
null
Backport PR #37986
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749,662,069
MDU6SXNzdWU3NDk2NjIwNjk=
38,036
speed up apply calculation
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2020-11-24T12:23:41Z
2020-11-24T17:15:14Z
2020-11-24T17:15:14Z
NONE
null
Hi, I have a huge database with multi index ((8832, 14384)) from which I calculate some statistics with code like that : ```python (df .apply([ lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., lambda x: ..., ], axis=1) ) ``` My problem is that it took **more than 5 min** to do the calculation (!!!!). Is there a way to do it better ? Multiprocessing but don't know how to structure it ? Thx
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749,673,072
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KeyError in datetime pandas when accessing with datetime.date
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2020-11-24T12:40:34Z
2021-11-18T00:13:05Z
null
NONE
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I've just upgrade Big Sur 11.0.1 and I'm facing some issue while trying to execute a notebook. Weird because it worked on Catalina. Could anyone help ? ``` import numpy as np import pandas as pd import yfinance as yf # In[56]: #parameters RISKY_ASSET = 'ADBE' START_DATE = '2017-01-01' END_DATE = '2020-07-31' # In[57]: #Download data: df = yf.download(RISKY_ASSET, start=START_DATE, end=END_DATE, adjusted=True) # In[58]: #daily return adj_close = df['Adj Close'] returns = adj_close.pct_change().dropna() print(f'Average return: {100 * returns.mean():.2f}%') returns.plot(title=f'{RISKY_ASSET} returns: {START_DATE} - {END_DATE}') # In[59]: #Split the data into training and test sets: train = returns['2017-01-01':'2020-06-30'] test = returns['2020-07-01':'2020-07-31'] # In[60]: #parameters of the simulation: T = len(test) N = len(test) S_0 = adj_close[train.index[-1].date()] N_SIM = 1000 mu = train.mean() sigma = train.std() ``` **And here the errors:** ``` --------------------------------------------------------------------------- KeyError Traceback (most recent call last) <ipython-input-7-9316c025c623> in <module> 2 T = len(test) 3 N = len(test) ----> 4 S_0 = adj_close[train.index[-1].date()] 5 N_SIM = 1000 6 mu = train.mean() ~/opt/anaconda3/lib/python3.8/site-packages/pandas/core/series.py in __getitem__(self, key) 880 881 elif key_is_scalar: --> 882 return self._get_value(key) 883 884 if is_hashable(key): ~/opt/anaconda3/lib/python3.8/site-packages/pandas/core/series.py in _get_value(self, label, takeable) 987 988 # Similar to Index.get_value, but we do not fall back to positional --> 989 loc = self.index.get_loc(label) 990 return self.index._get_values_for_loc(self, loc, label) 991 ~/opt/anaconda3/lib/python3.8/site-packages/pandas/core/indexes/datetimes.py in get_loc(self, key, method, tolerance) 620 else: 621 # unrecognized type --> 622 raise KeyError(key) 623 624 try: KeyError: datetime.date(2019, 12, 31) ` ```
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749,678,978
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38,038
REGR: Performance regression on RollingGroupby
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9
2020-11-24T12:49:16Z
2020-12-01T09:12:37Z
2020-12-01T09:12:37Z
NONE
null
pd.DataFrame({'a': np.random.randn(10000000), 'b': 1}).groupby('b').rolling(3).mean() is approximately 10x slower between 1.0.5 and 1.1.x
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Is possible pass `Series` to `groupby.head` ?
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2020-11-24T14:59:50Z
2021-08-14T05:53:21Z
null
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From this [answer](https://stackoverflow.com/a/64988556/2901002) working returned first top groups from another column: data = {'month': ['Jan','Jan','Jan','Jan','Feb','Feb','Feb','Feb','Feb','Feb'], 'userid': ['2345','2345','2345','2345', '2345','2345','2345','5678', '5678', '5678'], 'cntr': [3,3,3,3,1,1,1,2,2,2]} df = pd.DataFrame(data = data, columns = ['month','userid','cntr']) df1 = df.groupby(['month','userid']).head(df.cntr.astype(int)) print (df1) month userid cntr 0 Jan 2345 3 1 Jan 2345 3 2 Jan 2345 3 4 Feb 2345 1 7 Feb 5678 2 8 Feb 5678 2 If different values is used first value of group: data = {'month': ['Jan','Jan','Jan','Jan','Feb','Feb','Feb','Feb','Feb','Feb'], 'userid': ['2345','2345','2345','2345', '2345','2345','2345','5678', '5678', '5678'], 'cntr': [2,3,3,3,1,1,1,2,2,2]} df = pd.DataFrame(data = data, columns = ['month','userid','cntr']) df1 = df.groupby(['month','userid']).head(df.cntr.astype(int)) print (df1) month userid cntr 0 Jan 2345 2 1 Jan 2345 3 2 Feb 2345 1 3 Feb 5678 2 4 Feb 5678 2 --- If it is valid way, why is not mentioned it in documentation, [link](https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.core.groupby.GroupBy.head.html)? If it is not valid, why not rase error? Thank you. If necessary: print (pd.show_versions()) INSTALLED VERSIONS ------------------ commit : 2a7d3326dee660824a8433ffd01065f8ac37f7d6 python : 3.8.5.final.0 python-bits : 64 OS : Windows OS-release : 7 Version : 6.1.7601 machine : AMD64 processor : Intel64 Family 6 Model 60 Stepping 3, GenuineIntel byteorder : little LC_ALL : None LANG : en LOCALE : Slovak_Slovakia.1250 pandas : 1.1.2 numpy : 1.19.1 pytz : 2020.1 dateutil : 2.8.1 pip : 20.2.3 setuptools : 49.6.0.post20200925 Cython : 0.29.21 pytest : 6.1.0 hypothesis : None sphinx : 3.2.1 blosc : None feather : None xlsxwriter : 1.3.4 lxml.etree : 4.5.2 html5lib : 1.1 pymysql : None psycopg2 : None jinja2 : 2.11.2 IPython : 7.18.1 pandas_datareader: 0.9.0 bs4 : 4.9.1 bottleneck : 1.3.2 fsspec : 0.8.0 fastparquet : None gcsfs : None matplotlib : 3.3.1 numexpr : 2.7.1 odfpy : None openpyxl : 3.0.5 pandas_gbq : None pyarrow : None pytables : None pyxlsb : None s3fs : None scipy : 1.5.0 sqlalchemy : 1.3.19 tables : 3.6.1 tabulate : None xarray : None xlrd : 1.2.0 xlwt : 1.3.0 numba : 0.51.2 None
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BUG: Series constructor drops nanoseconds of Timedelta scalar
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2020-11-24T16:22:30Z
2021-03-22T20:24:55Z
2020-12-11T08:49:23Z
CONTRIBUTOR
null
- [x] closes #38032 - [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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38,041
BUG: pytables in py39
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2020-11-24T17:26:35Z
2020-11-25T15:28:59Z
2020-11-25T03:58:19Z
MEMBER
null
There are failures I'm getting locally since homebrew bumped up to py39. I'm not seeing them on the CI, but they _did_ appear around the same time as these [different](https://dev.azure.com/pandas-dev/pandas/_build/results?buildId=48423&view=logs&j=2d7fb38a-2053-50f3-a67c-09f6e91d3121&t=449937cc-3d50-56b5-5662-e489f41f1268) unexplained pytables failures started showing up.
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ENH: groupby.apply axis=1 behavior
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2020-11-24T17:29:44Z
2020-11-28T17:16:18Z
null
MEMBER
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xref #9772 ``` df = pd.DataFrame({i:pd.Series(np.random.normal(size=10), index=range(10)) for i in range(11)}) g = df.groupby(['a']*6+['b']*5, axis=1) g.apply(lambda x : x.sum()) ``` now raises, but used to give the (perhaps) surprising output ``` a b 0 -0.381070 NaN 1 -1.214075 NaN 2 -1.496252 NaN 3 3.392565 NaN 4 -0.782376 NaN 5 1.306043 NaN 6 NaN -1.772334 7 NaN 4.125280 8 NaN 1.992329 9 NaN 4.283854 10 NaN -4.791092 ``` A fix for this (today and previously) would be to pass `axis=1` into the call to sum, but again I think that is viewed as unintuitive. In https://github.com/pandas-dev/pandas/issues/9772#issuecomment-723498819 I argued: > ...when pandas feeds a group of values into the UDF, they are _not_ transposed. It seems reasonable to me to argue that they should be, but one technical hurdle here is what happens with a frame where the columns are different dtypes. Upon transposing, you now have columns of mixed dtypes, which are coerced to object type. So upon transposing the result back you lose type information. Since the UDF can return anything, there is no way to reliably determine that the resulting dtypes should be. > > Of course, an argument against transposing the group when passing it to the UDF is that this would be a rather large change for what seems to me to be of little value. A few counter points that I've realized in the meantime: - The case of multiple dtypes seems to me to be a very minor one, to the point of insignificance. Is there an example of a (somewhat natural) function that is applied to multiple dtypes where the resulting dtype does not get coerced correctly? I've played around with this in the code, the only such example in the tests is the identify function. - This is notably not how `groupby(..., axis=1).transform` works, nor is it how apply/transform/agg with no groupby and `axis=1` work. These methods all feed in the row as a Series so that supplying `axis=1` results in an error. I'm now of the opinion that transposing the inputs and results is more maintainable and easier to grok for users.
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TYP: Add cast to ABC Index-like types
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2020-11-24T17:40:31Z
2020-12-06T14:03:54Z
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MEMBER
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry cc @simonjayhawkins For the added type-ignore, the attribute `inferred_freq` is added dynamically onto the index instance.
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CLN: Remove .values from groupby.sem
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2020-11-24T17:58:15Z
2020-12-06T14:03:54Z
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MEMBER
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Closure of #22046 allows removing the workaround.
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749,929,141
MDExOlB1bGxSZXF1ZXN0NTI2NjY0OTQ2
38,045
CLN: dont mix Int64Index into PeriodIndex
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0
2020-11-24T18:07:05Z
2020-11-26T18:50:07Z
2020-11-26T17:34:48Z
MEMBER
null
- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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749,971,877
MDU6SXNzdWU3NDk5NzE4Nzc=
38,046
BUG: BDay() offsetting not behaving as expected
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6
2020-11-24T19:18:09Z
2020-12-18T23:05:35Z
2020-12-18T23:05:35Z
NONE
null
```python import pandas as pd from pandas.tseries.offsets import CDay, BDay idx = pd.bdate_range("2010/02/01","2010/02/15", freq='6H') t1 = idx + BDay(offset=pd.Timedelta(3, unit='H')) t2 = idx + CDay(offset=pd.Timedelta(3, unit='H')) t1.equals(t2) False ``` #### Problem description BDay does not seem to be offsetting when a timedelta is supplied. #### Expected Output True #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : db08276bc116c438d3fdee492026f8223584c477 python : 3.6.12.final.0 python-bits : 64 OS : Linux OS-release : 3.10.0-514.6.1.el7.x86_64 Version : #1 SMP Wed Jan 18 13:06:36 UTC 2017 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : C LOCALE : None.None pandas : 1.1.3 numpy : 1.19.2 pytz : 2020.1 dateutil : 2.8.1 pip : 20.2.4 setuptools : 50.3.1.post20201107 Cython : 0.29.21 pytest : 6.1.1 hypothesis : None sphinx : 3.2.1 blosc : None feather : None xlsxwriter : 1.3.7 lxml.etree : 4.6.1 html5lib : 1.1 pymysql : None psycopg2 : None jinja2 : 2.11.2 IPython : 7.16.1 pandas_datareader: 0.9.0 bs4 : 4.9.3 bottleneck : 1.3.2 fsspec : 0.8.3 fastparquet : None gcsfs : None matplotlib : 3.3.2 numexpr : 2.7.1 odfpy : None openpyxl : 3.0.5 pandas_gbq : None pyarrow : None pytables : None pyxlsb : None s3fs : None scipy : 1.5.2 sqlalchemy : 1.3.20 tables : 3.6.1 tabulate : None xarray : None xlrd : 1.2.0 xlwt : 1.3.0 numba : 0.51.2 </details>
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DOC: Remove repeated words and wrong /it's/ usage
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0
2020-11-24T19:30:11Z
2020-11-26T18:55:15Z
2020-11-26T17:37:58Z
CONTRIBUTOR
null
- [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` Remove (manually reviewed) repeated words from documentation/comments as well as wrong usage of `it's` (replaced by `its` where appropriated).
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ENH: adding support for Py3.6+ memory tracing for khash-maps
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1
2020-11-24T22:48:40Z
2020-11-27T08:15:07Z
2020-11-26T17:43:44Z
CONTRIBUTOR
null
- [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Tracemalloc is a standard tool for tracing of memory consumption in Python. Until now khash-maps were invisible for this tool. This PR follows more or less numpy's approach (see https://github.com/numpy/numpy/commit/03534ec90dba2bcdcd649be64be57939dde4c6f5) for adding tracemalloc-support. This PR fixes also silly mistakes from #37920 (see https://github.com/pandas-dev/pandas/pull/38048/commits/3291ed198432a80eb559382fbf9a35cb6a8ad749) and the somewhat imprecise implementation of `sizeof` for `XXXHashTable`-classes.
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2020-11-25T01:36:22Z
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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BUG: Index.drop raises on non-unique Index
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2020-11-25T02:21:50Z
2020-12-02T23:28:04Z
2020-12-02T23:28:04Z
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``` index = pd.Index(range(3)).repeat(2) >>> index.drop(1) Traceback (most recent call last): [...] pandas.errors.InvalidIndexError: Reindexing only valid with uniquely valued Index objects ``` It is using Index.get_indexer, which is only for uniques indexes.
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2020-11-25T02:26:54Z
2020-11-26T18:48:00Z
2020-11-26T17:56:18Z
MEMBER
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- [ ] closes #xxxx - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry There's a check in get_indexer that is missing from get_indexer_non_unique, which this adds. This is going to make some de-duplication easier. Hard to find a user-facing example bc indexing with all-bool indexer we treat it as a mask and not a list of labels. The closest I got to a user-facing example was in Series.drop, but that ran in to #38051.
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BUG: calling at[] on a Series with a single-level MultiIndex returns a Series, not a scalar
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2
2020-11-25T02:51:39Z
2020-11-29T15:59:10Z
2020-11-29T15:59:10Z
NONE
null
- [YES] I have checked that this issue has not already been reported. - [YES] I have confirmed this bug exists on the latest version of pandas. - [NO] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Code Sample, a copy-pastable example ```python idx1 = pd.MultiIndex.from_tuples([(False, 1.0), (False, 10.0), (True, 1.0), (True, 10.0)]) s1 = pd.Series((0, 1, 2, 3), index = idx1) s1.at[(False, 1.0)] # returns '0', expected output idx2 = pd.MultiIndex.from_tuples([(False,), (True,)]) s2 = pd.Series((0, 1), index = idx2) s2.at[False] # returns a pandas.Series with one element ``` #### Problem description As per the user guide, I expect `at[]` to return a scalar. However, when I index a `Series` with a `MultiIndex` with only one level, `at[]` returns a `Series` with a single element. A `Series` with a multi-level `MultiIndex` works as expected. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : db08276bc116c438d3fdee492026f8223584c477 python : 3.6.12.final.0 python-bits : 64 OS : Linux OS-release : 5.4.0-54-generic Version : #60-Ubuntu SMP Fri Nov 6 10:37:59 UTC 2020 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.1.3 numpy : 1.19.2 pytz : 2020.1 dateutil : 2.8.1 pip : 20.2.4 setuptools : 50.3.1.post20201107 Cython : None pytest : None hypothesis : None sphinx : 3.2.1 blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.11.2 IPython : 7.16.1 pandas_datareader: None bs4 : None bottleneck : 1.3.2 fsspec : None fastparquet : None gcsfs : None matplotlib : 3.3.2 numexpr : 2.7.1 odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pyxlsb : None s3fs : None scipy : 1.5.2 sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : None </details>
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38,054
TST: tighten assert_index_equal calls
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2020-11-25T02:53:57Z
2020-11-26T23:07:43Z
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MEMBER
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38,055
CLN: remove ABCIndex
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5
2020-11-25T03:20:37Z
2020-11-26T15:34:43Z
2020-11-26T00:30:57Z
MEMBER
null
It's a footgun. BTW I expect the CI to fail until #38020 goes in, which will [demonstrate](https://github.com/pandas-dev/pandas/pull/38020#discussion_r529159757) that there is a test case that uses MultiIndex.
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38,056
CI: Renable window tests on Windows
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1
2020-11-25T06:05:21Z
2020-11-25T21:10:43Z
2020-11-25T21:10:38Z
MEMBER
null
- [x] closes #37535 - [ ] tests added / passed Checking if the recent cleanup of the `tests/window` directory had any impact.
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38,057
PERF: fix regression in creation of resulting index in RollingGroupby
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17
2020-11-25T09:03:16Z
2020-12-08T14:36:41Z
2020-12-01T09:12:37Z
MEMBER
null
Closes #38038 TODO: fix corner cases, add benchmark, ..
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38,058
BUG: nan values in dataframe index when reading from multiple parquet files
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1
2020-11-25T10:27:28Z
2020-11-25T14:17:44Z
2020-11-25T14:15:11Z
NONE
null
- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- **Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports) detailing how to provide the necessary information for us to reproduce your bug. #### Code Sample, a copy-pastable example ```python >>> import pandas as pd >>> df1 = pd.DataFrame({'a':[1, 2, 3]}, index=['a','b','c']) >>> df1.to_parquet('abc/one.parquet') >>> df2 = pd.DataFrame({'a':[4, 5, 6]}) >>> df2.to_parquet('abc/two.parquet') >>> df3 = pd.DataFrame({'a':[7, 8, 9]}) >>> df3.to_parquet('abc/three.parquet') >>> pd.read_parquet('abc/') a a 1 b 2 c 3 NaN 7 NaN 8 NaN 9 NaN 4 NaN 5 NaN 6 ``` #### Problem description When we are reading multiple parquet files using `pd.read_parquet` and one of them has a different index than other two then there are `NaN` values in the rest of Index positions, is this a desired behavior? #### Expected Output Ideally I would expect all Index objects to be appended, i.e., we'd have some duplicate Index values in this case. ```python >>> import pandas as pd >>> df1 = pd.DataFrame({'a':[1, 2, 3]}, index=['a','b','c']) >>> df1.to_parquet('abc/one.parquet') >>> df2 = pd.DataFrame({'a':[4, 5, 6]}) >>> df2.to_parquet('abc/two.parquet') >>> df3 = pd.DataFrame({'a':[7, 8, 9]}) >>> df3.to_parquet('abc/three.parquet') >>> pd.read_parquet('abc/') a a 1 b 2 c 3 0 7 1 8 2 9 0 4 1 5 2 6 ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : 67a3d4241ab84419856b84fc3ebc9abcbe66c6b3 python : 3.7.3.final.0 python-bits : 64 OS : Darwin OS-release : 20.1.0 Version : Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:11 PDT 2020; root:xnu-7195.50.7~2/RELEASE_X86_64 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : None LOCALE : en_US.UTF-8 pandas : 1.1.4 numpy : 1.19.2 pytz : 2020.1 dateutil : 2.8.1 pip : 20.2.3 setuptools : 50.3.0 Cython : None pytest : None hypothesis : 5.29.0 sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.11.2 IPython : None pandas_datareader: None bs4 : None bottleneck : None fsspec : None fastparquet : None gcsfs : None matplotlib : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : 1.0.1 pytables : None pyxlsb : None s3fs : None scipy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : None </details>
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38,059
Backport PR #37039: CI: move py39 build to conda #33948
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0
2020-11-25T10:33:24Z
2020-11-25T11:51:18Z
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MEMBER
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Backport PR #37039
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38,060
BUG: Changing values in copied dataframe manipulates the original dataframe
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4
2020-11-25T10:58:25Z
2020-11-25T21:56:10Z
2020-11-25T21:55:53Z
NONE
null
Hey everybody, so I ran into something odd last night. I had two dataframes: dataframe_original and the dataframe_copy. Whenever I changed the values in a column of dataframe_copy the code changed the values in dataframe_original. I had the original one as a backup and assign it every iteration to a local copy. I displayed the output of the original dataframe (so not the one I attempted to change) but it showed the changes were made on the original one, not the copied one. For assigning the original frame to the copied one I tried all these approaches: 1) local_df.loc[local_df.index, local_df.columns] = df.tail(l) 2) local_df = pd.DataFrame(data = df.tail(l)) 3) local_df = pd.DataFrame(df.tail(l)) 4) local_df = df But no matter what, it did not actually copy the frame, it just created a reference to the original one. I assume this is not how the constructor is supposed to work? Thanks for your time. --- #### Code Sample ``` import pandas as pd #### Data d = {'col1': [1, 1, 1], 'col2': [1, 1, 1], 'col3': [1, 1, 1]} df = pd.DataFrame(data = d) #### Limits for the iteration xr = 2 yr = 2 #### Value to add v = 1 #### Length l = 2 #### Loop local_df = pd.DataFrame(df.tail(l)) list_of_df = [] for x in range(xr): for y in range(yr): local_df.loc[local_df.index, local_df.columns] = df.tail(l) local_df["col1"] = local_df["col1"] + v list_of_df.append(local_df) display(df) ``` [ <img width="834" alt="Screenshot 2020-11-25 at 11 52 11" src="https://user-images.githubusercontent.com/28649176/100218656-4f870700-2f15-11eb-9f10-8044a666df66.png"> ](url) <img width="858" alt="Screenshot 2020-11-25 at 11 57 53" src="https://user-images.githubusercontent.com/28649176/100218776-780f0100-2f15-11eb-876c-98dec3270df5.png"> Versions & Sys: macOS Mojave 10.14.6 Python 3.7.3 Pandas 1.1.4 ipython 7.4.0 _anaconda_depends 2019.03 anaconda-client .7.2 anaconda-navigator 1.9.7 anaconda-project 0.8.2
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Backport PR #38041 on branch 1.1.x: BUG: pytables in py39 (#38041)
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0
2020-11-25T11:58:01Z
2020-11-25T12:48:18Z
2020-11-25T12:48:13Z
MEMBER
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Backport PR #38041 on branch 1.1.x
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DOC: move info docs to DataFrameInfo
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2021-10-04T14:11:41Z
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Precursor for #37320 Move ``info`` docstring from ``pandas/core/frame.py`` to class ``DataFrameInfo`` using ``doc`` decorator. @simonjayhawkins need your help here as discussed previously.
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ENH: add a keyword to the eq method to consider NAs equal
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2020-11-25T12:37:42Z
2021-08-14T05:55:16Z
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### Code Sample This works as expected. Comparing nan with nan evaluates to False. ```python >>> import pandas as pd >>> import numpy as np >>> s1 = pd.Series(np.nan) >>> s1.eq(s1) 0 False dtype: boolean ``` However, this does not work as expected. Comparing nan with nan evaluates to nan. ```python >>> import pandas as pd >>> import numpy as np >>> s1 = pd.Series(np.nan).astype(pd.StringDtype()) >>> s1.eq(s1) 0 <NA> dtype: boolean ``` ### Problem description As in other programming languages I would expect the comparison between nan values for equality evaluates to False. In the first case, this works as expected. However, for the second it does not. I read the docs for the [Nullable Boolean data type](https://pandas.pydata.org/pandas-docs/stable/user_guide/boolean.html). It implements the Kleene Logic for Boolean data type. So, the second case is expected behavior, too. The issue is even explicitly stated in the docs. It is just not very consistent between the two cases. I searched for similar bug reports and was not sure if they are directly related. For reference please look here: - [https://github.com/pandas-dev/pandas/issues/20442](https://github.com/pandas-dev/pandas/issues/20442) - [https://github.com/pandas-dev/pandas/issues/36941](https://github.com/pandas-dev/pandas/issues/36941) ### Expected behavior I would expect that the two cases behave consistently. In which way, is not so important for me. ### Output of pd.show_versions() <details> <summary>Details</summary> ``` INSTALLED VERSIONS ------------------ commit : 67a3d4241ab84419856b84fc3ebc9abcbe66c6b3 python : 3.8.5.final.0 python-bits : 64 OS : Darwin OS-release : 20.1.0 Version : Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:11 PDT 2020; root:xnu-7195.50.7~2/RELEASE_X86_64 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : None LOCALE : None.UTF-8 pandas : 1.1.4 numpy : 1.19.4 pytz : 2020.4 dateutil : 2.8.1 pip : 20.2.4 setuptools : 50.3.1.post20201107 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 fsspec : None fastparquet : None gcsfs : None matplotlib : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pyxlsb : None s3fs : None scipy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : None ``` </details>
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DOC: tidy 1.1.5 release notes
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ENH: Add get_window method on a rolling object
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2020-11-26T12:34:02Z
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#### Is your feature request related to a problem? Yes. I would like to make a test of a function that is then applied on a rolling object. Making that test on just one window of the rolling object would be convenient. #### Describe the solution you'd like Someting similar to get_group for a groupby object. This would be something like : rolling.get_window(0) for first window for example. #### API breaking implications I do not know of any. #### Describe alternatives you've considered #### Additional context
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19
2020-11-25T15:51:33Z
2020-12-08T19:16:55Z
2020-12-08T11:12:23Z
MEMBER
null
Tracking issue for the 1.1.5 release. https://github.com/pandas-dev/pandas/milestone/79
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750,998,859
MDU6SXNzdWU3NTA5OTg4NTk=
38,067
DOC: Include missing holiday observance rules
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2020-11-25T17:25:35Z
2021-08-14T05:55:56Z
null
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#### Location of the documentation [Timeseries Holiday](https://pandas.pydata.org/pandas-docs/stable/user_guide/timeseries.html#holidays-holiday-calendars) section in doc/source/user_guide/timeseries.rst. #### Documentation problem The list of available holiday observance rules is incomplete - several available observances are missing. #### Suggested fix for documentation The following observances should be added to the documentation because they are already available: - next_workday - previous_workday - before_nearest_workday - after_nearest_workday Before I examined `holiday` via TAB-completion I had written my own version of weekend_to_monday; others may likewise re-invent these wheels if they're not documented. (Updated to remove "weekend_to_monday" because it does the same thing as "next_monday")
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751,038,480
MDExOlB1bGxSZXF1ZXN0NTI3NjI3Njc2
38,068
ENH: NDArrayBackedExtensionArray.__array_function__
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2
2020-11-25T18:32:41Z
2021-03-02T15:54:21Z
2020-12-21T21:37:43Z
MEMBER
null
motivated by getting np.delete and np.repeat working, had to implement a few others to get the tests passing. If we go down this path, I plan to incrementally add support for others, some of which (e.g. vstack) will avoid some object-dtype casting. cc @TomAugspurger @shoyer @seberg any suggestions to clean the implementation, particularly the fallback and the unknown-args comments?
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38,069
ENH: Rename multi-level columns or indices using their tupelized names
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3
2020-11-25T19:57:28Z
2020-11-25T22:25:55Z
2020-11-25T21:06:43Z
NONE
null
It's currently quite difficult to rename a single column (or row) in a multi-indexed DataFrame. The problem is illustrated also in this [SO article](https://stackoverflow.com/questions/54693188). The current approach requires at least 3 steps: ``` df = pd.DataFrame([[1,2,3],[3,4,5],[5,6,7], [7,8,9]]) df.columns = pd.MultiIndex.from_tuples([('i','a'),('i','b'),('ii','a')]) # Alternative 1 i = df.columns.get_loc(('i','b')) cols = df.columns.values cols[i] = ('i','c') df.columns = pd.MultiIndex.from_tuples(cols) # Alternative 2 df.columns = df.columns.to_flat_index() df = df.rename(columns={('i','b'):('i','c')}) df.columns = pd.MultiIndex.from_tuples(df.columns) ``` #### Enhancement: In presence of a MultiIndex, `rename()` should support the tupelized representation of a column. ``` df = pd.DataFrame([[1,2,3],[3,4,5],[5,6,7], [7,8,9]]) df.columns = pd.MultiIndex.from_tuples([('i','a'),('i','b'),('ii','a')]) # Rename using tuples: df.rename(columns={('i','b'):('ii','b')}) # Rename using current column name (equivalent to 1a) col = df[('i','b')] df.rename(columns={col.name: ('ii','b')}) ``` This would improve the consistency of the API, since many methods accept a tuple to address the name of a multi-index element: ``` df[('i','a')] df.drop(('i','a'), axis=1) df.pop(('i','a'), axis=1) ... ``` #### API breaking implications I regard this improvement as an extension of the current API.
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38,070
BUG: Index.drop raising Error when Index has duplicates
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2020-11-25T20:11:11Z
2020-12-03T22:14:42Z
2020-12-02T23:28:05Z
MEMBER
null
- [x] closes #38051 - [x] closes #33494 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry @jbrockmendel This should deal with duplicates. For MultiIndex sometimes a slice with stepzize greater than zero was given, which dropped to many elements
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BUG: DataFrame.loc returning empty result with negative stepsize for MultiIndex
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2
2020-11-25T21:19:03Z
2020-12-02T18:43:00Z
2020-12-02T18:38:54Z
MEMBER
null
- [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry This was easier than thought. Should I add a whatsnew note for this?
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751,148,256
MDExOlB1bGxSZXF1ZXN0NTI3NzE2OTg3
38,072
TST/REF: take things out of Base tests
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0
2020-11-25T22:15:45Z
2020-11-26T18:48:31Z
2020-11-26T17:57:57Z
MEMBER
null
Trying to clear up the confusing: common.py defines Base test_base.py imports Base from common test_common does not and try to get away from the create_index usage to just use the index fixture Small steps.
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751,159,040
MDExOlB1bGxSZXF1ZXN0NTI3NzI1ODY4
38,073
BUG: Series.where casting dt64 to int64
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7
2020-11-25T22:43:24Z
2020-12-29T18:13:45Z
2020-12-29T18:09:25Z
MEMBER
null
- [x] closes #37682 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry This sits on top of #38021
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751,168,770
MDExOlB1bGxSZXF1ZXN0NTI3NzMzODU2
38,074
PERF: fix regression in tz_convert_from_utc
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6
2020-11-25T23:10:32Z
2020-11-26T15:35:34Z
2020-11-26T15:35:30Z
CONTRIBUTOR
null
- [x] closes #35803 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry - N/A I believe Get rid of an unnecessary copy.
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38,075
ENH: pd.link([*dataframes], how='left')
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10
2020-11-26T01:49:47Z
2021-08-14T05:59:48Z
2021-08-14T05:59:48Z
NONE
null
#### Is your feature request related to a problem? When working with data that contains a lot of references, pd.merge seems to be the best approach. If you need to follow more than 1 reference to get where you need, this quickly gets verbose. To solve this problem, I suggest a higher level wrapping for merge, that is focused around being able to follow multiple references. Some potential names are: ```py pd.link([*dataframes]) # The one I use in the examples below pd.follow([*dataframes]) pd.traverse([*dataframes]) ``` #### Describe the solution you'd like Example implementation below: ```py from functools import reduce import pandas as pd def link(dataframes, how='left'): """ Follow references in between pandas dataframes and series. Parameters: ----------- `values` is an iterable of pd.DataFrame or pd.Series. `how` decides how the internal pd.merge will be performed. """ def _link(x, y): # Support for passing in pandas series if type(x) == pd.Series: x = x.to_frame() if type(y) == pd.Series: y = y.to_frame() return pd.merge(x, y, left_on=list(x.columns), right_index=True, how=how)[y.columns] return reduce(_link, dataframes) ``` ### Example ![image](https://user-images.githubusercontent.com/410028/100298345-2efc9280-2f91-11eb-808c-2f8b684977bb.png) #### And for the variables used: <details><summary>user_to_session_id</summary> ![image](https://user-images.githubusercontent.com/410028/100298042-5e5ecf80-2f90-11eb-9598-0be86835d54c.png) </details> <details><summary>session_id_to_article_id</summary> ![image](https://user-images.githubusercontent.com/410028/100298111-8bab7d80-2f90-11eb-9172-b871ecd25b28.png) </details> <details><summary>article_id_to_price_usd</summary> ![image](https://user-images.githubusercontent.com/410028/100298221-d6c59080-2f90-11eb-8bf5-dfb804160f16.png) </details> --- <details><summary>Code</summary> ```python sessions = pd.DataFrame({ 'session_id': ['a', 'b', 'c', 'd'], 'user': ['jack', 'jack', 'john', 'steve'], }) user_to_session_id = sessions.set_index('user') orders = pd.DataFrame({ 'session_id': ['a', 'b', 'c', 'c'], 'article_id': ['x', 'x', 'y', 'x'] }) session_id_to_article_id = orders.set_index('session_id') articles = pd.DataFrame({ 'article_id': ['x', 'y'], 'price_usd': [25, 50] }) article_id_to_price_usd = articles.set_index('article_id') link([ user_to_session_id, session_id_to_article_id, article_id_to_price_usd ]) ``` </details> ### Notes This could be created to only support pd.Series - but then this prevents us from merging multi-index frames/series. For merging multi-index data, we need a multi-column frame to match the index.
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Finding these annoying while doing other work in this directory.
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2020-11-27T17:41:13Z
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- [ ] closes #xxxx - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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MDExOlB1bGxSZXF1ZXN0NTI4MDA4Mjc2
38,080
DOC: Clean .ix references in indexing.rst
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1
2020-11-26T11:17:31Z
2020-11-26T16:43:45Z
2020-11-26T16:18:51Z
CONTRIBUTOR
null
`DataFrame.ix` is removed from the code base, so rephrase a section in the docs that was referencing it.
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751,575,831
MDExOlB1bGxSZXF1ZXN0NTI4MDY0MjU4
38,081
Backport PR #38064 on branch 1.1.x (DOC: tidy 1.1.5 release notes)
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0
2020-11-26T13:04:16Z
2020-11-26T13:56:29Z
2020-11-26T13:56:29Z
NONE
null
Backport PR #38064: DOC: tidy 1.1.5 release notes
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MDU6SXNzdWU3NTE1Nzc4ODM=
38,082
PERF: investigate alt implementations for cross join
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1
2020-11-26T13:07:29Z
2020-11-26T13:49:10Z
null
CONTRIBUTOR
null
in #37864 cross join was added let's add some benchmarks
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38,083
PERF: regression in Series.asof with single date
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2
2020-11-26T13:18:21Z
2020-11-27T07:24:04Z
2020-11-27T07:24:04Z
MEMBER
null
From https://pandas.pydata.org/speed/pandas/#timeseries.AsOf.time_asof_single?p-constructor='Series'&commits=52a17259-24e881d4&x-axis=commit&Cython=0.29.21&python=3.8 Snippet extracted from ASV: ```python N = 10000 rng = pd.date_range(start="1/1/1990", periods=N, freq="53s") s = pd.Series(np.random.randn(N), index=rng) dates = pd.date_range(start="1/1/1990", periods=N * 10, freq="5s") date = dates[0] %timeit s.asof(date) ``` On pandas 1.1 this takes around 20µs, on master I get around 110µs Commit range indicated by ASV is https://github.com/pandas-dev/pandas/compare/52a17259...24e881d4
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BLD: Use conda(-forge) compilers
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2
2020-11-26T13:24:34Z
2020-11-26T19:13:32Z
2020-11-26T19:13:32Z
CONTRIBUTOR
null
Use the compiler setup from conda-forge inside a conda environment. The compilers in conda-forge can be different and slightly incompatible with the system ones causing some headaches. Also this hopefully helps with initial setup of new contributors. Is this worth a whatsnew entry? - [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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MDExOlB1bGxSZXF1ZXN0NTI4MDc3MzM1
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TST : Categorical DataFrame.at overwritting row
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1
2020-11-26T13:27:48Z
2020-12-03T13:54:21Z
2020-11-26T18:08:12Z
CONTRIBUTOR
null
- [ ] closes #37763 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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PERF: performance regression in replace() corner cases
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5
2020-11-26T13:30:44Z
2020-11-27T01:01:26Z
2020-11-27T01:01:26Z
MEMBER
null
ASV shows a *gigantic* regression (14629.25x) in a certain `replace` benchmark: https://pandas.pydata.org/speed/pandas/#replace.ReplaceList.time_replace_list?python=3.8&Cython=0.29.21&p-inplace=True&commits=07559156-dbee8fae The simplified case is: ``` In [5]: df = pd.DataFrame({"A": 0, "B": 0}, index=range(4 * 10 ** 7)) In [6]: %timeit df.replace([np.inf, -np.inf], np.nan) 100 ms ± 6.76 ms per loop (mean ± std. dev. of 7 runs, 10 loops each) # 1.1 1.2 s ± 31.9 ms per loop (mean ± std. dev. of 7 runs, 1 loop each) # master ``` Compared to 1.1, I don't see such a huge difference, but still a decent slowdown (x10). Now, in this case, we have integer columns, but trying to replace infinity, which of course can never be present. So maybe before we had some shortcut for that. This also seems quite a cornercase, though. So not sure how critical the regression is.
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BLD: Only enable -Werror in the CI jobs
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12
2020-11-26T13:34:40Z
2020-12-01T16:41:28Z
2020-11-27T20:03:58Z
CONTRIBUTOR
null
closes #33315 closes #33314 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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DOC: clarify docs related to deprecation of indexing DataFrame with single partial datetime-string
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2
2020-11-26T14:15:02Z
2020-11-26T15:44:49Z
2020-11-26T15:37:27Z
MEMBER
null
A follow-up on https://github.com/pandas-dev/pandas/pull/36179#discussion_r494830867 (cc @jbrockmendel). Attempt to clarify what is actually deprecated, remove the `:okwarning:` for several cases in the docs that were not actually deprecated, and updated to use the preferred `.loc` for some others.
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BUG: merge_ordered fails with list-like left_by or right_by
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4
2020-11-26T15:05:37Z
2020-11-30T00:41:16Z
2020-11-29T17:45:41Z
CONTRIBUTOR
null
- [x] closes #35269 - [x] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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751,685,949
MDU6SXNzdWU3NTE2ODU5NDk=
38,090
CI/TST: suppress http debug from tests outputs
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0
2020-11-26T15:43:03Z
2020-11-28T17:33:56Z
2020-11-28T17:33:56Z
CONTRIBUTOR
null
examples from https://travis-ci.org/github/pandas-dev/pandas/jobs/746072525 We have this output coming from our fixtures (we startup a http endpoint to test things), but the output is totally unecessary / distracting. ``` 127.0.0.1 - - [26/Nov/2020 13:35:25] "PUT /pandas-test/items.jsonl HTTP/1.1" 200 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "PUT /pandas-test/simple_dataset.feather HTTP/1.1" 200 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "PUT /cant_get_it/tips%231.csv HTTP/1.1" 200 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "PUT /cant_get_it/tips.csv HTTP/1.1" 200 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "PUT /cant_get_it/tips.csv.gz HTTP/1.1" 200 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "PUT /cant_get_it/tips.csv.bz2 HTTP/1.1" 200 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "PUT /cant_get_it/items.jsonl HTTP/1.1" 200 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "PUT /cant_get_it/simple_dataset.feather HTTP/1.1" 200 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "HEAD /pandas-test/tips.csv HTTP/1.1" 200 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "GET /pandas-test/tips.csv HTTP/1.1" 206 - .127.0.0.1 - - [26/Nov/2020 13:35:25] "GET /pandas-test?list-type=2&prefix=&delimiter=%2F&encoding-type=url HTTP/1.1" 200 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "GET / HTTP/1.1" 200 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "POST /pandas-test?delete HTTP/1.1" 200 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "DELETE /pandas-test HTTP/1.1" 204 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "GET /cant_get_it?list-type=2&prefix=&delimiter=%2F&encoding-type=url HTTP/1.1" 200 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "GET / HTTP/1.1" 200 - 127.0.0.1 - - [26/Nov/2020 13:35:25] "POST /cant_get_it?delete HTTP/1.1" 200 - ```
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751,688,710
MDU6SXNzdWU3NTE2ODg3MTA=
38,091
CI: very slow tests
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2
2020-11-26T15:47:08Z
2020-11-26T17:08:38Z
null
CONTRIBUTOR
null
from a recent build on master, these builds are *very* slow. Yes we have 140k tests, but 30m is a lot of time (esp considering the azure builds are 2x faster). needs some investigation on what is happening. - https://travis-ci.org/github/pandas-dev/pandas/jobs/746072524 - https://travis-ci.org/github/pandas-dev/pandas/jobs/746072525 cc @pandas-dev/pandas-core
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751,694,851
MDU6SXNzdWU3NTE2OTQ4NTE=
38,092
TST: shift_across_dst failures
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0
2020-11-26T15:56:30Z
2020-11-26T15:56:30Z
null
CONTRIBUTOR
null
ERROR: type should be string, got "https://dev.azure.com/pandas-dev/pandas/_build/results?buildId=48611&view=logs&j=4b4d380c-92b5-58cf-5b80-2c6c9b1d5805&t=8eab1181-1335-58ed-7ed5-a271d9d86005\r\n\r\nwe want to see if this is a bug / add a test case\r\n\r\n```\r\n2020-11-26T11:02:32.6835667Z ##[section]Starting: Test\r\n2020-11-26T11:02:32.6968461Z ==============================================================================\r\n2020-11-26T11:02:32.6969827Z Task : Bash\r\n2020-11-26T11:02:32.6970534Z Description : Run a Bash script on macOS, Linux, or Windows\r\n2020-11-26T11:02:32.6971261Z Version : 3.177.2\r\n2020-11-26T11:02:32.6971826Z Author : Microsoft Corporation\r\n2020-11-26T11:02:32.6972383Z Help : https://docs.microsoft.com/azure/devops/pipelines/tasks/utility/bash\r\n2020-11-26T11:02:32.6973012Z ==============================================================================\r\n2020-11-26T11:02:32.9619865Z Generating script.\r\n2020-11-26T11:02:32.9824762Z [command]\"C:\\Program Files\\Git\\bin\\bash.exe\" --noprofile --norc -c pwd\r\n2020-11-26T11:02:33.0802003Z /d/a/_temp\r\n2020-11-26T11:02:33.0846216Z \r\n2020-11-26T11:02:33.0876225Z ========================== Starting Command Output ===========================\r\n2020-11-26T11:02:33.0885510Z [command]\"C:\\Program Files\\Git\\bin\\bash.exe\" --noprofile --norc /d/a/_temp/d7f72ca5-7653-4d39-b14e-c4a3a640dc91.sh\r\n2020-11-26T11:02:33.7933378Z pytest -m \"not slow and not network\" -n auto --dist=loadfile -s --strict --durations=30 --junitxml=test-data.xml pandas --ignore=pandas/tests/window/ --ignore=pandas/tests/plotting/\r\n2020-11-26T11:03:46.1230792Z ##[warning]Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3,and in 3.9 it will stop working\r\n2020-11-26T11:03:46.1290301Z ##[warning]Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3,and in 3.9 it will stop working\r\n2020-11-26T11:03:46.1292192Z ##[warning]Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3,and in 3.9 it will stop working\r\n2020-11-26T11:03:46.1293979Z ##[warning]Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3,and in 3.9 it will stop working\r\n2020-11-26T11:03:46.1295207Z ============================= test session starts =============================\r\n2020-11-26T11:03:46.1295831Z platform win32 -- Python 3.7.9, pytest-6.1.1, py-1.9.0, pluggy-0.13.1\r\n2020-11-26T11:03:46.1296368Z rootdir: D:\\a\\1\\s, configfile: setup.cfg, testpaths: pandas\r\n2020-11-26T11:03:46.1296847Z plugins: hypothesis-5.41.3, azurepipelines-0.8.0, forked-1.3.0, xdist-2.1.0\r\n2020-11-26T11:03:46.1297375Z gw0 I / gw1 I\r\n2020-11-26T11:03:46.1297683Z gw0 [98481] / gw1 [98481]\r\n2020-11-26T11:03:46.1297932Z \r\n2020-11-26T11:19:01.9006050Z Result Attachments will be stored in LogStore\r\n2020-11-26T11:19:01.9506376Z Run Attachments will be stored in LogStore\r\n2020-11-26T11:19:03.1155850Z ##[error]1 test(s) failed, 98481 test(s) collected.\r\n2020-11-26T11:19:03.1158156Z Skipping uploading of coverage data.\r\n2020-11-26T11:19:03.1158771Z \r\n2020-11-26T11:19:03.1159206Z ================================== FAILURES ===================================\r\n2020-11-26T11:19:03.1159714Z ____________________________ test_shift_across_dst ____________________________\r\n2020-11-26T11:19:03.1160220Z [gw1] win32 -- Python 3.7.9 C:\\Miniconda\\envs\\pandas-dev\\python.exe\r\n2020-11-26T11:19:03.1160827Z \r\n2020-11-26T11:19:03.1161077Z @given(gen_yqm_offset)\r\n2020-11-26T11:19:03.1161361Z > def test_shift_across_dst(offset):\r\n2020-11-26T11:19:03.1161564Z \r\n2020-11-26T11:19:03.1161828Z pandas\\tests\\tseries\\offsets\\test_offsets_properties.py:107: \r\n2020-11-26T11:19:03.1162225Z _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _\r\n2020-11-26T11:19:03.1163012Z C:\\Miniconda\\envs\\pandas-dev\\lib\\site-packages\\hypothesis\\core.py:661: in execute_once\r\n2020-11-26T11:19:03.1164457Z % (test.__name__, text_repr[0])\r\n2020-11-26T11:19:03.1164917Z _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _\r\n2020-11-26T11:19:03.1165284Z \r\n2020-11-26T11:19:03.1165669Z self = <hypothesis.core.StateForActualGivenExecution object at 0x000001EC3C0E6D08>\r\n2020-11-26T11:19:03.1166349Z message = 'Hypothesis test_shift_across_dst(offset=<-4 * BYearEnds: month=1>) produces unreliable results: Falsified on the first call but did not on a subsequent one'\r\n2020-11-26T11:19:03.1168377Z \r\n2020-11-26T11:19:03.1168728Z def __flaky(self, message):\r\n2020-11-26T11:19:03.1169153Z if len(self.falsifying_examples) <= 1:\r\n2020-11-26T11:19:03.1169544Z > raise Flaky(message)\r\n2020-11-26T11:19:03.1170217Z E hypothesis.errors.Flaky: Hypothesis test_shift_across_dst(offset=<-4 * BYearEnds: month=1>) produces unreliable results: Falsified on the first call but did not on a subsequent one\r\n2020-11-26T11:19:03.1170780Z \r\n2020-11-26T11:19:03.1171182Z C:\\Miniconda\\envs\\pandas-dev\\lib\\site-packages\\hypothesis\\core.py:866: Flaky\r\n2020-11-26T11:19:03.1171722Z --------------------------------- Hypothesis ----------------------------------\r\n2020-11-26T11:19:03.1172169Z Falsifying example: test_shift_across_dst(\r\n2020-11-26T11:19:03.1172581Z offset=<-4 * BYearEnds: month=1>,\r\n2020-11-26T11:19:03.1172904Z )\r\n2020-11-26T11:19:03.1173635Z Unreliable test timings! On an initial run, this test took 638.78ms, which exceeded the deadline of 500.00ms, but on a subsequent run it took 1.55 ms, which did not. If you expect this sort of variability in your test timings, consider turning deadlines off for this test by setting deadline=None.\r\n2020-11-26T11:19:03.1174495Z \r\n2020-11-26T11:19:03.1174995Z You can reproduce this example by temporarily adding @reproduce_failure('5.41.3', b'AAsAAQQA') as a decorator on your test case\r\n2020-11-26T11:19:03.1175561Z ============================== warnings summary ===============================\r\n2020-11-26T11:19:03.1176092Z C:\\Miniconda\\envs\\pandas-dev\\lib\\site-packages\\matplotlib\\__init__.py:107\r\n2020-11-26T11:19:03.1176625Z C:\\Miniconda\\envs\\pandas-dev\\lib\\site-packages\\matplotlib\\__init__.py:107\r\n```"
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MDU6SXNzdWU3NTE2OTY1Njc=
38,093
Extend check for inconsistent pandas namespace usage
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2020-11-26T15:59:04Z
2021-02-14T14:00:35Z
2021-02-14T14:00:35Z
MEMBER
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xref #38076 - it can probably be extended beyond checking for classes. Steps would be: 1. change `PATTERN` in `scripts/check_for_inconsistent_pandas_namespace.py` to ``` PATTERN = r""" ( (?<!pd\.)(?<!\w) # check class_name doesn't start with pd. or character (\w+)\( # match DataFrame but not pd.DataFrame or tm.makeDataFrame .* # match anything pd\.\2\( # only match e.g. pd.DataFrame )| ( pd\.(\w+)\( # only match e.g. pd.DataFrame .* # match anything (?<!pd\.)(?<!\w) # check class_name doesn't start with pd. or character \4\( # match DataFrame but not pd.DataFrame or tm.makeDataFrame ) """ ``` and save. 2. run `pre-commit run inconsistent-namespace-usage --all-files`, check the error messages, and fix them up Here are the files which need fixing: ``` - [ ] pandas/tests/arrays/floating/test_to_numpy - [ ] pandas/tests/extension/decimal/test_decimal - [ ] pandas/tests/io/test_sql - [ ] pandas/tests/series/test_constructors - [ ] pandas/tests/arrays/test_datetimes - [ ] pandas/tests/frame/test_stack_unstack - [ ] pandas/tests/arrays/boolean/test_comparison - [ ] pandas/tests/internals/test_internals - [ ] pandas/tests/arrays/masked/test_arrow_compat - [ ] pandas/tests/reshape/merge/test_multi - [ ] pandas/tests/indexing/test_datetime - [ ] pandas/tests/scalar/timestamp/test_unary_ops ``` This can probably all be one in a single PR. 3. To check you've fixed up a file completely, running ``` pre-commit run inconsistent-namespace-usage --files <file.py> ``` should return "PASSED".
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MDExOlB1bGxSZXF1ZXN0NTI4MTg1NjU0
38,094
REGR: fix regression in groupby aggregation with out-of-bounds datetimes
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2020-11-26T16:46:02Z
2020-11-27T20:47:55Z
2020-11-27T20:12:02Z
MEMBER
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Closes #36003
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CLN: testing window namespace
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- [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` It appears we are heading this general direction in pandas imports in tests.
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2
2020-11-26T19:32:25Z
2020-11-28T18:33:18Z
2020-11-28T17:33:57Z
MEMBER
null
- [x] closes #38090 - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` Confirming that this does the trick.
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2020-11-26T21:19:47Z
2020-11-27T01:20:07Z
2020-11-27T01:01:26Z
MEMBER
null
- [ ] closes #xxxx - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry closes #38086, this gets us back to (very slightly ahead of) 1.1.4 performance for the cases there, will leave to @jorisvandenbossche whether that is enough to close the issue.
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API: CategoricalIndex.append fallback to concat_compat
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1
2020-11-26T21:26:43Z
2020-11-29T16:17:11Z
2020-11-29T15:59:57Z
MEMBER
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- [x] closes #14586 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry The main thing being changed here is `CategoricalIndex._concat` to better match the behavior of all the other `FooIndex._concat` methods. Everything else being changed here is just cleanup that this makes possible. cc @jorisvandenbossche
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751,836,355
MDExOlB1bGxSZXF1ZXN0NTI4MjczOTA5
38,099
BUG: fix wrong error message in deprecated 2D indexing of Series with datetime values
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8
2020-11-26T21:37:12Z
2020-12-01T10:02:42Z
2020-12-01T00:14:53Z
MEMBER
null
Closes #35527 For most Series types, this was properly raising the deprecation warning about 2D being deprecated, but for Series with datetimetz values, this started raising an AssertionError instead of only raising the warning.
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MDU6SXNzdWU3NTE4MzgyODQ=
38,100
BUG: random_state should permit numpy.random.Generator
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3
2020-11-26T21:42:54Z
2021-07-04T21:37:34Z
2021-07-04T21:37:34Z
CONTRIBUTOR
null
- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [x] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Code Sample, a copy-pastable example ```python import pandas as pd import numpy as np df = pd.DataFrame({'num_legs': [2, 4, 8, 0], 'num_wings': [2, 0, 0, 0], 'num_specimen_seen': [10, 2, 1, 8]}, index=['falcon', 'dog', 'spider', 'fish']) rng = np.random.default_rng() df.sample(random_state=rng) ``` Output: ```raw --------------------------------------------------------------------------- ValueError Traceback (most recent call last) <ipython-input-34-d27bfa21cee7> in <module> 4 index=['falcon', 'dog', 'spider', 'fish']) 5 rng = np.random.default_rng() ----> 6 df.sample(random_state=rng) C:\tools\miniconda3\envs\pandas-dev\lib\site-packages\pandas\core\generic.py in sample(self, n, frac, replace, weights, random_state, axis) 4914 4915 # Process random_state argument -> 4916 rs = com.random_state(random_state) 4917 4918 # Check weights for compliance C:\tools\miniconda3\envs\pandas-dev\lib\site-packages\pandas\core\common.py in random_state(state) 429 return np.random 430 else: --> 431 raise ValueError( 432 ( 433 "random_state must be an integer, array-like, a BitGenerator, " ValueError: random_state must be an integer, array-like, a BitGenerator, a numpy RandomState, or None ``` #### Problem description Best practice since Numpy 1.17 for creating random number generators is to use `numpy.random.default_rng`: https://numpy.org/doc/stable/reference/random/index.html?highlight=random#quick-start. This returns a `numpy.random.Generator` object. It should not be necessary to extract the underlying `BitGenerator` or convert it manually to a [legacy](https://numpy.org/doc/stable/reference/random/legacy.html#legacy) `numpy.random.RandomState`. Closest issues I can find are https://github.com/pandas-dev/pandas/issues/28440 (mentions performance only) and https://github.com/pandas-dev/pandas/issues/32503. Code is here: https://github.com/pandas-dev/pandas/blob/78d149897201cb55b403f6f84fc541a3d7aa86ad/pandas/core/common.py#L366 Current simplest workaround is as follows. I've confirmed that it advances `rng`. ```python df.sample(random_state=rng.bit_generator) ``` #### Expected Output Code above should not throw an error. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : 67a3d4241ab84419856b84fc3ebc9abcbe66c6b3 python : 3.8.6.final.0 python-bits : 64 OS : Windows OS-release : 10 Version : 10.0.18362 machine : AMD64 processor : Intel64 Family 6 Model 142 Stepping 12, GenuineIntel byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : English_United Kingdom.1252 pandas : 1.1.4 numpy : 1.19.4 pytz : 2020.4 dateutil : 2.8.1 pip : 20.2.4 setuptools : 49.6.0.post20201009 Cython : None pytest : 6.1.2 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.11.2 IPython : 7.19.0 pandas_datareader: None bs4 : None bottleneck : None fsspec : None fastparquet : None gcsfs : None matplotlib : 3.3.3 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : 2.0.0 pytables : None pyxlsb : None s3fs : None scipy : 1.5.3 sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : 0.51.2 </details>
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BUG: Series.at returning Series with one element instead of scalar
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2020-11-26T21:44:00Z
2020-11-29T16:04:01Z
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MEMBER
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- [x] closes #38053 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry I think if we are at this place and len(values) is 1, we want to return a scalar instead of a Series. This happens only because loc is a slice (0,1) with one MultiIndex level instead of a scalar. Should I create a file to move all MultiIndex at tests to the MultiIndex folder?
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REF: use _validate_fill_value in Index.insert
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2020-11-27T01:39:00Z
2020-12-13T18:26:11Z
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MEMBER
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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PERF: Index.searchsorted
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- [x] closes #38083 - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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BUG: RangeIndex is not being appened correctly
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2020-11-27T03:19:05Z
2021-08-14T16:54:58Z
2021-08-14T16:54:52Z
NONE
null
- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- **Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports) detailing how to provide the necessary information for us to reproduce your bug. #### Code Sample, a copy-pastable example ```python >>> import pandas as pd >>> df1 = pd.DataFrame({'a':[1, 2, 3]}) >>> df1.to_parquet('abc/one.parquet') >>> df2 = pd.DataFrame({'a':[4, 5, 6]}) >>> df2.to_parquet('abc/two.parquet') >>> df3 = pd.DataFrame({'a':[7, 8, 9]}) >>> df3.to_parquet('abc/three.parquet') >>> pd.read_parquet('abc/') a 0 1 1 2 2 3 3 7 4 8 5 9 6 4 7 5 8 6 ``` #### Problem description When there are multiple parquet files with identical/non-identical RangeIndex objects I think doing `pd.read_parquet` should ideally be appending all the RangeIndex objects of each parquet file. #### Expected Output ```python >>> pd.read_parquet('abc/') a 0 1 1 2 2 3 0 7 1 8 2 9 0 4 1 5 2 6 ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : 67a3d4241ab84419856b84fc3ebc9abcbe66c6b3 python : 3.7.3.final.0 python-bits : 64 OS : Darwin OS-release : 20.1.0 Version : Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:11 PDT 2020; root:xnu-7195.50.7~2/RELEASE_X86_64 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : None LOCALE : en_US.UTF-8 pandas : 1.1.4 numpy : 1.19.2 pytz : 2020.1 dateutil : 2.8.1 pip : 20.2.3 setuptools : 50.3.0 Cython : None pytest : None hypothesis : 5.29.0 sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.11.2 IPython : None pandas_datareader: None bs4 : None bottleneck : None fsspec : None fastparquet : None gcsfs : None matplotlib : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : 1.0.1 pytables : None pyxlsb : None s3fs : None scipy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : None </details>
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38,105
REF: implement _should_compare
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5
2020-11-27T04:11:58Z
2020-12-02T02:35:02Z
2020-12-02T01:51:11Z
MEMBER
null
- [ ] closes #xxxx - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Index._is_comparable_dtype is limited because it misses a few cases: object dtype, and sub-dtypes within categorical. This implements Indes._should_compare, which handles those correctly. It then implements `_get_indexer_non_comparable` for cases in which we short-circuit non-comparable dtypes. As a proof of concept, this then uses _should_compare and _get_indexer_non_comparable for `PeriodIndex.get_indexer`. The behavior change, which this tests, is one that IIUC is a bug. That is, when we do get_indexer with a method and non-comparable dtypes, we should raise instead of return all minus-ones. If implemented, we'll be able to use _should_compare to simplify all of the get_indexer, get_indexer_non_unique, and set op methods.
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38,106
BUG in Series.interpolate: limit_area/limit_direction kwargs with method="pad"/"bfill" have no effect
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2020-11-27T05:06:06Z
2020-12-01T22:45:17Z
2020-12-01T22:05:06Z
MEMBER
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- [x] closes #26796 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry Picking up #31048
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38,107
BUG: `df.copy` removes attributes from series in the original dataframe
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2020-11-27T05:41:19Z
2020-11-27T08:19:56Z
2020-11-27T08:16:40Z
CONTRIBUTOR
null
- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Code Sample, a copy-pastable example ```python # Your code here import pandas as pd df = pd.DataFrame({"a": [1, 2, 3]}) df["a"].attrs["key"] = "value" display(df["a"].attrs) # {'key': 'value'} _ = df.copy() display(df["a"].attrs) # {} ``` #### Problem description Calling copy on a dataframe probably shouldn't modify it or it's contents (especially those exposed through public attributes) in any way. I would also ague the copy should keep these attributes, but that's more related to #35425 #### Expected Output The second `display(df["a"].attrs)` should print: `{'key': 'value'}` #### Output of ``pd.show_versions()`` <details> ``` INSTALLED VERSIONS ------------------ commit : 67a3d4241ab84419856b84fc3ebc9abcbe66c6b3 python : 3.8.5.final.0 python-bits : 64 OS : Darwin OS-release : 19.6.0 Version : Darwin Kernel Version 19.6.0: Thu Oct 29 22:56:45 PDT 2020; root:xnu-6153.141.2.2~1/RELEASE_X86_64 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.1.4 numpy : 1.19.4 pytz : 2020.1 dateutil : 2.8.1 pip : 20.2.4 setuptools : 50.3.2 Cython : 0.29.21 pytest : 6.1.2 hypothesis : None sphinx : 3.3.1 blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.11.2 IPython : 7.19.0 pandas_datareader: None bs4 : None bottleneck : None fsspec : 0.7.4 fastparquet : 0.4.1 gcsfs : None matplotlib : 3.3.3 numexpr : 2.7.1 odfpy : None openpyxl : None pandas_gbq : None pyarrow : 2.0.0 pytables : None pyxlsb : None s3fs : 0.4.2 scipy : 1.5.4 sqlalchemy : 1.3.18 tables : 3.6.1 tabulate : 0.8.7 xarray : 0.16.1 xlrd : 1.2.0 xlwt : None numba : 0.51.2 ``` </details>
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BUG: calling at[] on a Series with a single-level MultiIndex returns a Series, not a scalar
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2020-11-27T10:25:00Z
2020-11-27T10:26:57Z
2020-11-27T10:25:33Z
CONTRIBUTOR
null
- [ ] closes #GH38053 - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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38,109
DOC: Add behavior for Index argument in DataFrame.loc
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1
2020-11-27T12:48:37Z
2020-11-29T18:06:28Z
2020-11-29T18:06:24Z
CONTRIBUTOR
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- [x] closes #36850 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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38,110
Follow-up on basic FloatingArray implementation
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2020-11-27T14:20:43Z
2021-08-14T16:56:29Z
null
MEMBER
null
Long overdue follow-up item on the initial merge of the nullable float64/float32 support (https://github.com/pandas-dev/pandas/pull/34307). List of follow-up TODO items: * [x] Update the `convert_dtypes` method to also return nullable floats (one question here: what with floats that are all "integer"-like? I think we want to keep returning nullable int for that, but we might want to add a parameter controlling that behaviour?) -> #38117 * [x] Arithmetic operations with IntegerArray/BooleanArray can now return a FloatingArray instead of numpy float array(eg division with Int64 should give Float64 -> #38178 * [ ] Ufuncs on IntegerArray/BooleanArray can return FloatingArray, ufuncs on mixture of IntegerArray/FloatArray * [x] Consolidate some tests that are common for integer/boolean/float * For example the `value_counts` test could easily be shared and moved to masked/ (see the ones I added in https://github.com/pandas-dev/pandas/pull/38178) * [ ] Deduplicate more things between the Array classes and move to BaseMaskedArray (eg the arithmetic / comparison ops can probably be moved with a bit of refactoring) * [x] `__from_arrow__` -> https://github.com/pandas-dev/pandas/pull/38411 * [ ] ufuncs -> https://github.com/pandas-dev/pandas/pull/38412 * [ ] `coerce_to_array`, but this will probably require some refactoring * [ ] Honor the formatting options (eg precision) #39336 * [x] Fix membership test for np.nan (`np.nan in arr`), see https://github.com/pandas-dev/pandas/pull/37867#discussion_r531079439 And of course, we also still have the NA vs NaN discussion to further flesh out (https://github.com/pandas-dev/pandas/issues/32265), but this issue is for the direct practical TODO items.
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38,111
BUG: name retention in Index.intersection
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2
2020-11-27T15:56:23Z
2020-12-02T01:49:46Z
2020-12-02T01:46:07Z
MEMBER
null
- [ ] closes #xxxx - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry its going to take a few passes to get the behavior consistent across all subclasses. once done, we can de-duplicate the boilerplate.
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REF: IntervalIndex._assert_can_do_setop
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0
2020-11-27T16:00:40Z
2020-11-28T18:23:50Z
2020-11-28T18:22:36Z
MEMBER
null
Working towards standardizing+deduplicating set ops across Index subclasses, xref #38111
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TST: rewrite convert_dtypes test to make it easier extendable
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2020-11-27T16:13:11Z
2020-11-28T14:31:45Z
2020-11-28T14:27:21Z
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I have a branch adding `convert_floating` support for ``convert_dtypes``, and the current way they are written is not really maintainable when adding more keywords (eg the tuples of 4 would become tuples of 5, making it even harder to know what is what, and making the formatting less easy to follow). In this PR, I just refactored how the test cases are defined and didn't change any actual content.
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MDExOlB1bGxSZXF1ZXN0NTI4Njk0MjM1
38,114
REF: implement _should_compare
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1
2020-11-27T16:16:58Z
2020-11-29T15:31:44Z
2020-11-29T15:31:15Z
MEMBER
null
Broken off from #38105 so I can start using it to fix inconsistent set ops.
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MDExOlB1bGxSZXF1ZXN0NTI4NzA5MDc2
38,115
Backport PR #34407 on branch 1.1.x: REGR: revert "CLN: _consolidate_inplace less" / fix regression in fillna()
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0
2020-11-27T16:44:12Z
2020-11-27T19:48:01Z
2020-11-27T19:47:55Z
MEMBER
null
Backport PR #34407
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752,378,890
MDExOlB1bGxSZXF1ZXN0NTI4NzE0NTAy
38,116
CLN: fix flake8 C408 part 2
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3
2020-11-27T16:58:38Z
2020-12-05T18:52:47Z
2020-11-28T17:35:09Z
MEMBER
null
followup of #38078
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38,117
ENH: include conversion to nullable float in convert_dtypes()
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6
2020-11-27T17:07:08Z
2020-11-29T19:29:16Z
2020-11-29T19:12:55Z
MEMBER
null
xref https://github.com/pandas-dev/pandas/issues/38110 There is one potentially corner case: what with floats that are all "integer"-like? I think we want to keep returning nullable int for that, at least by default, and that is what I did now in this PR But we might want to add a parameter controlling that behaviour? (but that can also be added later on if there is demand for it)
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MDExOlB1bGxSZXF1ZXN0NTI4NzMwMTU2
38,118
BUG: parsed datetime string resolution incorrect
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2020-11-27T17:45:38Z
2021-01-30T15:32:34Z
2021-01-24T01:22:07Z
NONE
null
I was working today with datetime index, you have the reso (resolutions) defined from year to nanosecond, but then you had the lines 560-570 repeating 'minute' and 'second', and working with millisecond or nanosecond raises a KeyIndex error. - [ ] closes #38121 - [ ] closes #38077 - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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