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- [x] closes #44079 - [ ] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [ ] whatsnew entry
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NONE
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#### Is your feature request related to a problem? No #### Describe the solution you'd like `pd.DataFrame.shift`/`pd.Series.shift` could alternatively accept a list of ints or a collection of numbers, and the result would be a dataframe with one column per shift. This would make it very convenient to e.g. create multiple lagged versions of a column for time series problems. E.g., ``` time_series_df[my_time_feature].shift([-3, -2, -1, 0, 1, 2, 3]) ``` would give me a dataframe with 7 columns, each shifted versions of `time_series_df[my_time_feature]`. #### API breaking implications The first input to `df.shift` would be overloaded to also accept a list of ints. #### Describe alternatives you've considered Alternatives are very simple to do, you just iterate over the lags and concatenate or join. This would just be a handy shortcut. #### Additional context I'd in principle be open to implementing this myself, although I've never contributed to pandas.
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- [x] closes #44322 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [x] whatsnew entry
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Transferring data from the 6th column to the first. This should resolve issue #44379
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BUG: DataFrame with mismatched NA value and dtype
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Doc: Clean obj.empty docs to describe Series/DataFrame
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- [x] closes #42697
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BUG: to_datetime/to_timedelta with memoryview
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Fix FloatingArray.equals on older numpy
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For e.g. `DataFrame.mask`, `inplace=True` can be misleading because it really means "inplace if you don't have to cast, otherwise not inplace". We could be more explicit with an enum like ``` class InPlace(enum.Enum): only = 0 # never copy; raise instead of casting attempt = 1 # inplace if you can, cast on fallback never = 2 # always make a copy ``` I think I've seen numpy discussions on doing something similar, forget which kwarg that was about.
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REF: simplify putmask_smart
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TST: FIXMES in DataFrame.quantile tests
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ENH: No numeric_only argument for pandas.core.groupby.GroupBy.rank()
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"2021-11-15T05:48:43Z"
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### pandas.core.groupby.GroupBy.rank does not have a numeric_only argument like DataFrame.rank() I have a DataFrame with several statistics from baseball teams across different years. I want to rank each team in each statistic, grouped by season. Every column is numeric, except for the teamID column which is an object type containing the names of each team as a string. My code looks something like this ```python stats = pd.read_csv('stats.csv') ranked = stats.groupby('yearID').rank(method='average', ascending=False) ranked['teamID'] = stats['teamID'] ``` Since it is GroupBy.rank() I can't pass the `numeric_only` argument and that means I have to reassign `ranked['teamID']` to the original column. I also cannot do ```python ranked = stats.groupby(['yearID', 'teamID']).rank(...) ``` because that would give everybody a rank of 1. Is there a reason that `numeric_only` is included in DataFrame.rank() but not GroupBy.rank(). Could it be added to GroupBy.rank()? Then I could code it like this, which would be easier. ```python ```python stats = pd.read_csv('stats.csv') ranked = stats.groupby('yearID').rank(method='average', ascending=False, numeric_only=False) ``` I am just a hobbyist and so I don't know much about the implementation of these methods which means there may be something I am completely ignoring, or another more efficient way to do it. If so I would appreciate some enlightenment about what I am missing. Thanks!
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ENH: Use stacklevel in warnings
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Part of #44347 - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them
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DOC: Some minor doc cleanups
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- [x] closes #40362 - [x] closes #44147
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BLD: Exclude CPT data files
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xref #44300. Since that added a .cpt data file, we should also exclude it from the manifest. - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [ ] whatsnew entry
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BUG: AttributeError: 'BooleanArray' object has no attribute 'sum' while infer types #44079
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- [x] closes #44079 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [x] whatsnew entry
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3
"2021-11-14T04:59:24Z"
"2021-11-14T14:13:28Z"
"2021-11-14T10:48:44Z"
MEMBER
null
Please see bpo 20028. https://github.com/python/cpython/pull/28705. This breaks our nightlies, but doesn't on regular CI. It should show up pretty soon in regular CI, once the conda-forge folks add it. This means unfortuanately that I have no way to test this. Can someone with with the perms on the MacPython repo please trigger the nightlies manually to see if that fixes the builds after this? Thanks. - [ ] closes #xxxx - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [ ] whatsnew entry
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Backport PR #44443 on branch 1.3.x (COMPAT: Python 3.9.8)
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Backport PR #44443: COMPAT: Python 3.9.8
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ENH: Infer inner file name of zip archive (GH39465)
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5
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"2021-11-17T06:48:35Z"
"2021-11-17T02:09:41Z"
CONTRIBUTOR
null
relevant for `DataFrame.to_csv` and `Series.to_csv` with `compression='zip'` - [x] closes #39465 - also relevant for #26023 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [x] whatsnew entry This fix is similar-in-spirit to #40387, which has been abandoned. ## Before / After ```py from pandas import pd df = pd.DataFrame() df.to_csv('../test.csv.zip') ``` ### Before ``` > unzip -l test.csv.zip Archive: test.csv.zip Length Date Time Name --------- ---------- ----- ---- 3 2021-11-14 13:39 ../test.csv.zip --------- ------- 3 1 file ``` Notice the `..` in the path - bad! And, of course, that the file _inside_ the zip file is also called `test.csv.zip`. ### After ``` > unzip -l test.csv.zip Archive: test.csv.zip Length Date Time Name --------- ---------- ----- ---- 3 2021-11-14 13:44 test.csv --------- ------- 3 1 file ```
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Added "." on to check_dtype and obj parameter
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"2021-11-15T14:56:55Z"
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CONTRIBUTOR
null
- [] closes #xxxx - [] tests added / passed - [] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [] whatsnew entry From #28602 `pandas.testing.assert_categorical_equal: Parameter "check_dtype" description should finish with "." pandas.testing.assert_categorical_equal: Parameter "obj" description should finish with "."`
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DOC: Remove use of as_type for PeriodIndex to DatetimeIndex conversion
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MEMBER
null
- [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them Followup to #44398. Should get docs build to green. cc @jbrockmendel ![image](https://user-images.githubusercontent.com/45562402/141684919-f8e79f49-a2c8-4001-bd2d-13849e5c0b41.png)
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CI/TST Removed Timestamp.now() from tests. #44341
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"2021-11-17T17:06:45Z"
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CONTRIBUTOR
null
Removed Timestamp.now() from tests. #44341 Replaced Timestamp.now () with pd.Timestamp (2021, 1, 1, 12)
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TST: check_stacklevel=True in various tests
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MEMBER
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- [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them
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CI: benchmark build is taking a long time
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"2021-11-16T16:20:12Z"
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CONTRIBUTOR
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xref https://github.com/pandas-dev/pandas/runs/4204157179?check_suite_focus=true have seen this on multiple PRs. Maybe something recently added causes this to timeout.
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WARN: Add FutureWarning to `DataFrame.to_html`
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CONTRIBUTOR
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This follows #44411 and has the same purpose.
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Revert "CI: xfail tests failing on numpy dev"
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"2021-11-15T12:38:02Z"
"2021-11-15T12:12:19Z"
MEMBER
null
Reverts pandas-dev/pandas#44362 closes #44343
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44,453
BLD: remove support for 32 bit
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"2021-11-14T19:03:22Z"
"2021-11-17T02:29:01Z"
null
CONTRIBUTOR
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seems microsoft has removed support starting 3.10 (as is numpy) we should do the same
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DOC: substitute multiple entries for `subset` in `style.py`
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"2021-11-14T19:12:29Z"
"2021-11-20T21:21:40Z"
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CONTRIBUTOR
null
as described
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CLN: TODOs and FIXMEs
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44,456
TST: Troubleshoot windows timeouts
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44,457
REF: dont dispatch Block.putmask to Block.where
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BUG: groupby 2 column then can't set value on multiple columns
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [ ] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python import pandas as pd import numpy as np def f(df): f'{df}' df[['c', 'd']]=np.zeros([len(df),2]) df=pd.DataFrame([[1,2],[1,3]],columns=['a','b']) dfg=df.groupby(['a','b']).apply(f) ``` ### Issue Description 1) groupby 2 columns and "apply" a function 2) set value to multiple columns in this "apply" function 3) in the second group invoking this "apply" function, on access of input df, it report an error: ```Length of values (2) does not match length of index (4)``` ### Expected Behavior groupby apply function should not keep changes of index into next iteration ### Installed Versions INSTALLED VERSIONS ------------------ commit : 945c9ed766a61c7d2c0a7cbb251b6edebf9cb7d5 python : 3.9.7.final.0 python-bits : 64 OS : Windows OS-release : 10 Version : 10.0.17763 machine : AMD64 processor : Intel64 Family 6 Model 158 Stepping 10, GenuineIntel byteorder : little LC_ALL : None LANG : zh_CN LOCALE : Chinese (Simplified)_China.936 pandas : 1.3.4 numpy : 1.21.3 pytz : 2021.3 dateutil : 2.8.2 pip : 21.3.1 setuptools : 57.4.0 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 : 7.29.0 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 pyxlsb : None s3fs : None scipy : 1.7.1 sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : None
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"2021-11-15T13:55:29Z"
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- [x] closes #4980 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them
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DEV: add note to update cython version in environment.yml and asv conf as well
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Seeing https://github.com/pandas-dev/pandas/pull/44359, this seems a good idea to remember the next time cython version is bumped
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To check the benchmarks timings for https://github.com/pandas-dev/pandas/issues/44450
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BUG: get_indexer_non_unique() does not always handle NaNs correctly
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CONTRIBUTOR
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [X] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python import pandas as pd import numpy as np idx_no_nan = pd.Index([1, 2], dtype=np.float64) idx_nan = pd.Index([1, 2, np.nan]) print("dtype=np.float64") target = pd.Index([1, np.nan], dtype=np.float64) print(idx_no_nan.get_indexer(target)) print(idx_no_nan.get_indexer_non_unique(target)) print(idx_nan.get_indexer(target)) print(idx_nan.get_indexer_non_unique(target)) print("dtype='object'") target = pd.Index([1, np.nan], dtype='object') print(idx_no_nan.get_indexer(target)) print(idx_no_nan.get_indexer_non_unique(target)) print(idx_nan.get_indexer(target)) print(idx_nan.get_indexer_non_unique(target)) ``` ### Issue Description Annotated script output ``` dtype=np.float64 [ 0 -1] (array([ 0, -1]), array([1])) # ← expected [0 2] (array([ 0, -1]), array([1])) # ← would expect (array([0, 2]), array([], dtype=int64) dtype='object' [ 0 -1] (array([0, 0, 1]), array([], dtype=int64)) # ← would expect (array([0, -1]), array([1])) [0 2] (array([0, 2]), array([], dtype=int64) # ← expected ``` ### Expected Behavior As the indexes and the targets are unique I would expect the output of `get_indexer()` and `get_indexer_non_unique()` to be equivalent. ``` dtype=np.float64 [ 0 -1] (array([ 0, -1]), array([1])) [0 2] (array([0, 2]), array([], dtype=int64) dtype='object' [ 0 -1] (array([0, -1]), array([1])) [0 2] (array([0, 2]), array([], dtype=int64) ``` ### Installed Versions <details> INSTALLED VERSIONS ------------------ commit : a07561e5a33b78cb54d163e81dd7a4444ca41554 python : 3.8.12.final.0 python-bits : 64 OS : Linux OS-release : 5.4.0-90-lowlatency Version : #101-Ubuntu SMP PREEMPT Fri Oct 15 20:57:56 UTC 2021 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : de_DE.UTF-8 LOCALE : de_DE.UTF-8 pandas : 1.4.0.dev0+1117.ga07561e5a3 numpy : 1.21.4 pytz : 2021.3 dateutil : 2.8.2 pip : 21.3.1 setuptools : 58.5.3 Cython : 0.29.24 pytest : 6.2.5 hypothesis : 6.24.2 sphinx : 4.2.0 blosc : None feather : None xlsxwriter : 3.0.2 lxml.etree : 4.6.4 html5lib : 1.1 pymysql : None psycopg2 : None jinja2 : 3.0.3 IPython : 7.23.1 pandas_datareader: None bs4 : 4.10.0 bottleneck : 1.3.2 fsspec : 2021.11.0 fastparquet : 0.7.1 gcsfs : 2021.11.0 matplotlib : 3.4.3 numexpr : 2.7.3 odfpy : None openpyxl : 3.0.9 pandas_gbq : None pyarrow : 6.0.0 pyxlsb : None s3fs : 2021.11.0 scipy : 1.7.2 sqlalchemy : 1.4.26 tables : 3.6.1 tabulate : 0.8.9 xarray : 0.18.2 xlrd : 2.0.1 xlwt : 1.3.0 numba : 0.53.1 </details>
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BUG: fix timedelta floordiv with scalar float
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"2021-11-15T10:53:10Z"
"2021-11-15T15:33:58Z"
"2021-11-15T15:06:51Z"
MEMBER
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Discovered while trying to fix test failures in https://github.com/pandas-dev/pandas/pull/40482. Currently normal division with a float scalar works, but floordiv doesn't (returns garbage): ``` In [42]: arr = pd.timedelta_range(0, periods=3) In [43]: pd.Series(arr) / 2.0 Out[43]: 0 0 days 00:00:00 1 0 days 12:00:00 2 1 days 00:00:00 dtype: timedelta64[ns] In [44]: pd.Series(arr) // 2.0 Out[44]: 0 0 days 00:00:00 1 55681 days 08:53:22.404319232 2 55733 days 11:53:22.031689728 dtype: timedelta64[ns] In [45]: pd.__version__ Out[45]: '1.3.3' ``` It's only the scalar case; dividing with eg float array already works: ``` In [46]: pd.Series(arr) // np.array([2.0]*3) Out[46]: 0 0 days 00:00:00 1 0 days 12:00:00 2 1 days 00:00:00 dtype: timedelta64[ns] ``` I suppose the current code uses the workaround of `asi8` and casting back to timedelta, because numpy didn't support floordiv in the past (didn't check which version started to implement this, will see what CI says) - [ ] whatsnew entry
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ENH: Implement reading the output of a MDX query into a dataframe.
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#### Is your feature request related to a problem? This may be a quite big thing. But I's like pandas to be able to execute a MDX query to an OLAP server and read the results into a DataFrame. #### Describe the solution you'd like I imagine there could be a function similar to pd.read_sql #### API breaking implications May require a new library as a pandas dependency? #### Describe alternatives you've considered It's possible to actually embed a MDX query into a SQL and simply use read_sql. It's also possible to use a library like adodbapi and transform the output into a DataFrame myself. But both feel kind of cumbersome.
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TYP/CLN: remove defaults from overloads
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Backport PR #44452: Revert "CI: xfail tests failing on numpy dev"
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Backport PR #44452
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BUG: Segmentation-fault during a "custom" rolling operation
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [ ] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python from pandas.core.window.indexers import BaseIndexer from typing import Union, Tuple, Optional import numpy as np import pandas as pd class RollingFixedOffsetVariableWindowIndexer(BaseIndexer): def get_window_bounds(self, num_values: int = 0, min_periods: Optional[int] = None, center: Optional[bool] = None, closed: Optional[str] = None) -> Tuple[np.ndarray, np.ndarray]: # Every hour start = np.arange(0, num_values, 60 * 60) # Every hour + day end = start + 60 * 60 * 24 return start, end ser = pd.Series(np.arange(100000), index=pd.date_range(start='2020', freq='1s', periods=100000)) idxr = RollingFixedOffsetVariableWindowIndexer(window_size=60 * 60 * 24) out = ser.rolling(idxr, min_periods=10).mean() ``` ### Issue Description (Maybe related to #43267 ? Couldn't tell.) I'm trying to create a custom `BaseIndexer` for a `.rolling` operation. The extraction of the window is quick and efficient, yet when I attempt to perform various operations on it I get the seg-fault error: > Process finished with exit code 139 (interrupted by signal 11: SIGSEGV) I have created an MWE for this behavior using a fixed-indexer (that carries the same name). The original indexer was supposed to produce a rolling-operation with overlaps, so the above indexer is similar in the sense that it creates a 1-day windows 1-hour apart for a one-second index. ### Expected Behavior Hmmm... Not to have a seg-fault error? ### Installed Versions INSTALLED VERSIONS ------------------ commit : 945c9ed766a61c7d2c0a7cbb251b6edebf9cb7d5 python : 3.8.9.final.0 python-bits : 64 OS : Linux OS-release : 5.4.0-77-generic Version : #86~18.04.1-Ubuntu SMP Fri Jun 18 01:23:22 UTC 2021 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.3.4 numpy : 1.18.5 pytz : 2018.3 dateutil : 2.8.1 pip : 21.1.3 setuptools : 57.4.0 Cython : None pytest : 6.2.2 hypothesis : None sphinx : 3.5.3 blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : 0.999999999 pymysql : None psycopg2 : None jinja2 : 2.11.3 IPython : None pandas_datareader: None bs4 : 4.6.0 bottleneck : None fsspec : 0.8.7 fastparquet : None gcsfs : None matplotlib : 3.1.3 numexpr : 2.7.3 odfpy : None openpyxl : 3.0.7 pandas_gbq : None pyarrow : None pyxlsb : None s3fs : None scipy : 1.4.1 sqlalchemy : None tables : 3.6.1 tabulate : 0.8.9 xarray : None xlrd : 1.2.0 xlwt : None numba : None None Process finished with exit code 139 (interrupted by signal 11: SIGSEGV)
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BUG: fix timedelta floordiv with scalar float (correction of #44466)
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Follow-up on https://github.com/pandas-dev/pandas/pull/44466#discussion_r749430496 I still need to add a test that would actually catch this
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…n empty dataframe in terms of index naming - [ ] closes #xxxx - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [ ] whatsnew entry
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BUG: Values in pivot table that aren't in original df
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [ ] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python import pandas as pd import numpy as np df = pd.read_csv('filtered1.csv') df = df.pivot_table( index='X', columns='Y', values='T').reset_index() df ``` ### Issue Description Some of the values in the pivot table aren't in the file used. I attached the file I'm using and a screenshot of my current output [filtered1.csv](https://github.com/pandas-dev/pandas/files/7540864/filtered1.csv) ![image](https://user-images.githubusercontent.com/64660988/141834814-16324c3e-b80f-44cc-bc06-223100445ab6.png) ### Expected Behavior I should get a pivot table with only the values in the file. ### Installed Versions <details> ------------------ commit : f00ed8f47020034e752baf0250483053340971b0 python : 3.9.7.final.0 python-bits : 64 OS : Linux OS-release : 5.15.2-zen1-1-zen Version : #1 ZEN SMP PREEMPT Fri, 12 Nov 2021 19:22:07 +0000 machine : x86_64 processor : byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.3.0 numpy : 1.21.0 pytz : 2021.3 dateutil : 2.8.2 pip : 20.3.4 setuptools : 57.4.0 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : 4.6.4 html5lib : 1.1 pymysql : None psycopg2 : None jinja2 : 3.0.3 IPython : 7.29.0 pandas_datareader: None bs4 : 4.9.3 bottleneck : None fsspec : None fastparquet : None gcsfs : None matplotlib : 3.4.2 numexpr : None odfpy : None openpyxl : 3.0.9 pandas_gbq : None pyarrow : None pyxlsb : None s3fs : None scipy : 1.7.1 sqlalchemy : 1.4.25 tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : None </details>
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- [ ] closes #xxxx - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [x] whatsnew entry Looks like a pass to de-duplicate the test_business_day and test_custom_business_day files would be worthwhile
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REF: rolling benchmarks to reduce redundant benchmarks
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xref https://github.com/pandas-dev/pandas/issues/44450 - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them Some of the current `param` definitions are causing the same benchmark to run more than once without changes. Reorganizing the benchmarks such that the `param` combinations avoid the redundancy.
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [ ] whatsnew entry Bit of a shot in the dark.
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"2021-11-15T23:59:31Z"
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CONTRIBUTOR
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i think this is worth it to make the Check build very fast and then this build (at 30m is ok) xref #44450
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avoid a warning by PyTypeChecker
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NDFrame.to_csv(str) got a warning by PyTypeChecker, "Expected type 'None', got 'str' instead" use typing.Union to combine type "FilePathOrBuffer[AnyStr]" and "None", instead of " | " can avoid it. ![image](https://user-images.githubusercontent.com/24448028/141879473-56355ca2-60de-4405-94a3-fdc3013cf5a7.png) - [ ] closes #xxxx - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [ ] whatsnew entry
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MEMBER
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [ ] whatsnew entry We have to run out of these eventually, right? right?
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DOC: df.to_html documentation incorrectly contains min_rows optional param (release note)
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"2021-11-16T04:27:52Z"
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CONTRIBUTOR
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- [x] closes #44304 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [x] whatsnew entry Following PR #44331, I added a release note for the 1.4.0 release according to @simonjayhawkins recommendation. Happy to move it into another paragraph if needed.
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BUG: get_indexer_non_unique() does not find NaNs.
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [X] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python import pandas as pd import numpy as np idx = pd.Index([1, 2, np.nan]) target = pd.Index([1, np.nan]) print(idx.get_indexer(target)) print(idx.get_indexer_non_unique(target)) ``` ### Issue Description The script outputs: ``` [0 2] (array([ 0, -1]), array([1])) ``` So `get_indexer()` correctly found the NaN value at position 2 but `get_indexer_non_unique()` has not found the NaN value anywhere. This is one aspect of #44465 which needs to be split due to two different root causes. ### Expected Behavior Expected output ``` [0 2] (array([ 0, 2]), array([], dtype=int64)) ``` ### Installed Versions <details> INSTALLED VERSIONS ------------------ commit : 700be617eb567fb4ab82aa8151d5c4ee02c22b95 python : 3.8.12.final.0 python-bits : 64 OS : Linux OS-release : 5.4.0-90-lowlatency Version : #101-Ubuntu SMP PREEMPT Fri Oct 15 20:57:56 UTC 2021 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : de_DE.UTF-8 LOCALE : de_DE.UTF-8 pandas : 1.4.0.dev0+1132.g700be617eb numpy : 1.21.4 pytz : 2021.3 dateutil : 2.8.2 pip : 21.3.1 setuptools : 58.5.3 Cython : 0.29.24 pytest : 6.2.5 hypothesis : 6.24.2 sphinx : 4.2.0 blosc : None feather : None xlsxwriter : 3.0.2 lxml.etree : 4.6.4 html5lib : 1.1 pymysql : None psycopg2 : None jinja2 : 3.0.3 IPython : 7.23.1 pandas_datareader: None bs4 : 4.10.0 bottleneck : 1.3.2 fsspec : 2021.11.0 fastparquet : 0.7.1 gcsfs : 2021.11.0 matplotlib : 3.4.3 numexpr : 2.7.3 odfpy : None openpyxl : 3.0.9 pandas_gbq : None pyarrow : 6.0.0 pyxlsb : None s3fs : 2021.11.0 scipy : 1.7.2 sqlalchemy : 1.4.26 tables : 3.6.1 tabulate : 0.8.9 xarray : 0.18.2 xlrd : 2.0.1 xlwt : 1.3.0 numba : 0.53.1 </details>
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BUG: get_indexer_non_unique() does not handle targets of dtype='object' with NaNs correctly
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [X] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python import pandas as pd import numpy as np idx = pd.Index([1.0, 2.0]) target = pd.Index([1, np.nan], dtype='object') print(idx.get_indexer(target)) print(idx.get_indexer_non_unique(target)) ``` ### Issue Description The script outputs ``` [ 0 -1] (array([0, 0, 1]), array([], dtype=int64)) ``` It boils down to the fact that in `object` arrays with NaNs in them the are not sorted in as expected as discussed in numpy/numpy#15499. This is one aspect of #44465 which needs to be split due to two different root causes. ### Expected Behavior Expected output ``` [ 0 -1] (array([ 0, -1]), array([1])) ``` ### Installed Versions <details> INSTALLED VERSIONS ------------------ commit : 700be617eb567fb4ab82aa8151d5c4ee02c22b95 python : 3.8.12.final.0 python-bits : 64 OS : Linux OS-release : 5.4.0-90-lowlatency Version : #101-Ubuntu SMP PREEMPT Fri Oct 15 20:57:56 UTC 2021 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : de_DE.UTF-8 LOCALE : de_DE.UTF-8 pandas : 1.4.0.dev0+1132.g700be617eb numpy : 1.21.4 pytz : 2021.3 dateutil : 2.8.2 pip : 21.3.1 setuptools : 58.5.3 Cython : 0.29.24 pytest : 6.2.5 hypothesis : 6.24.2 sphinx : 4.2.0 blosc : None feather : None xlsxwriter : 3.0.2 lxml.etree : 4.6.4 html5lib : 1.1 pymysql : None psycopg2 : None jinja2 : 3.0.3 IPython : 7.23.1 pandas_datareader: None bs4 : 4.10.0 bottleneck : 1.3.2 fsspec : 2021.11.0 fastparquet : 0.7.1 gcsfs : 2021.11.0 matplotlib : 3.4.3 numexpr : 2.7.3 odfpy : None openpyxl : 3.0.9 pandas_gbq : None pyarrow : 6.0.0 pyxlsb : None s3fs : 2021.11.0 scipy : 1.7.2 sqlalchemy : 1.4.26 tables : 3.6.1 tabulate : 0.8.9 xarray : 0.18.2 xlrd : 2.0.1 xlwt : 1.3.0 numba : 0.53.1 </details>
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BUG: fix get_indexer_non_unique() with 'object' targets with NaNs (#4…
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CONTRIBUTOR
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…4482) numpy.searchsorted() does not handle NaNs in 'object' arrays as expected (numpy/numpy#15499). Therefore we cannot search NaNs using binary search. So we use binary search only for targets without NaNs. - [x] closes #44482 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [x] whatsnew entry This does also put the whatsnew of #44404 to the correct place.
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API (BUG?): DatetimeArray.astype vs to_numpy behaviour differences
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Currently, the `to_numpy()` implementation on the datetimelike arrays is quite simple (basically `np.array(EA, dtype)`, which calls `__array__` which returns/casts the underlying numpy array). This means that it basically follows numpy's casting rules, while for `astype` we have a whole bunch of custom conversion rules. Some examples: ```python In [1]: arr = pd.date_range("2012-01-01", periods=3).array In [2]: arr Out[2]: <DatetimeArray> ['2012-01-01 00:00:00', '2012-01-02 00:00:00', '2012-01-03 00:00:00'] Length: 3, dtype: datetime64[ns] # conversion to string (-> different formatting) In [3]: arr.astype(str) Out[3]: array(['2012-01-01', '2012-01-02', '2012-01-03'], dtype=object) In [4]: arr.to_numpy(str) Out[4]: array(['2012-01-01T00:00:00.000000000', '2012-01-02T00:00:00.000000000', '2012-01-03T00:00:00.000000000'], dtype='<U48') # conversion to float or timedelta (error vs working cast) In [5]: arr.astype(float) ... TypeError: Cannot cast DatetimeArray to dtype float64 In [6]: arr.to_numpy(float) Out[6]: array([1.3253760e+18, 1.3254624e+18, 1.3255488e+18]) In [7]: arr.astype('timedelta64[ns]') ... TypeError: Cannot cast DatetimeArray to dtype timedelta64[ns] In [8]: arr.to_numpy('timedelta64[ns]') Out[8]: array([1325376000000000000, 1325462400000000000, 1325548800000000000], dtype='timedelta64[ns]') ``` We might say: `to_numpy()` is for converting to a numpy array, so in that case it is fine to follow numpy's casting rules. But it would still be good to explicitly decide on this. On the other hand it's also strange to have two different sets of rules (and the fact that it uses numpy's rules here is somewhat an implementation detail).
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BUG: dataframe.replace({np.nan: None}) failed when replaced even number of times
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [x] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python import numpy as np import pandas as pd def check_nan(df): for entry in df.to_dict(orient='records'): if any([isinstance(v, float) and np.isnan(v) for v in entry.values()]): return True return False def generate_df(): return pd.DataFrame(dict(age=[5, 6, np.NaN], born=[pd.NaT, pd.Timestamp('1939-05-27'), pd.Timestamp('1940-04-25')], name=['Alfred', 'Batman', ''], toy=[None, 'Batmobile', 'Joker'])) def where_not_working(): df = generate_df() df = df.where((pd.notnull(df)), None) print('where not working', check_nan(df)) def replace_working(): df = generate_df() df = df.replace({np.nan: None}) print('replace working', check_nan(df)) def replace_twice_not_working(): df = generate_df() df = df.replace({np.nan: None}) df = df.replace({np.nan: None}) print('replace twice not working', check_nan(df)) def replace_odd_num_working(): df = generate_df() df = df.replace({np.nan: None}) df = df.replace({np.nan: None}) df = df.replace({np.nan: None}) print('replace three times working', check_nan(df)) where_not_working() replace_working() replace_twice_not_working() replace_odd_num_working() ``` ### Issue Description As shown in the example above: dataframe.replace({np.nan: None}) works when it's applied to a dataframe once, 3 times, but not working (or "reverse" the change) when run twice, 4 times, etc. ### Expected Behavior It should consistently have the result dataframe containing no np.nan, doesn't matter how many replace attempts have been made. ### Installed Versions INSTALLED VERSIONS ------------------ commit : 945c9ed766a61c7d2c0a7cbb251b6edebf9cb7d5 python : 3.8.12.final.0 python-bits : 64 OS : Linux OS-release : 4.18.0-240.1.1.el8_3.x86_64 Version : #1 SMP Fri Oct 16 13:36:46 EDT 2020 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : None LOCALE : en_US.UTF-8 pandas : 1.3.4 numpy : 1.21.2 pytz : 2021.3 dateutil : 2.8.2 pip : 21.2.4 setuptools : 58.0.4 Cython : None pytest : 6.2.4 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : 4.6.3 html5lib : None pymysql : None psycopg2 : None jinja2 : 3.0.2 IPython : None pandas_datareader: None bs4 : None bottleneck : 1.3.2 fsspec : None fastparquet : None gcsfs : None matplotlib : None numexpr : 2.7.3 odfpy : None openpyxl : 3.0.9 pandas_gbq : None pyarrow : None pyxlsb : None s3fs : None scipy : 1.7.1 sqlalchemy : 1.4.22 tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : None
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ENH: DataFrame.sample should accept numpy.random.Generator
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NONE
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This seems to be related to this [issue](https://github.com/pandas-dev/pandas/issues/28440) and this [merge](https://github.com/pandas-dev/pandas/pull/42243). But currently DataFrame.sample does not allow Generator objects for random_state. ## Rationale As far as I can tell, the convention for numpy 1.21 random sampling, in their [documentation](https://numpy.org/doc/stable/reference/random/index.html) is to create Generators using numpy.random.default_rng, so creating BitGenerators directly seems a little awkward. ## Fix This is a quick fix though because the generator has [field](https://numpy.org/doc/stable/reference/random/generated/numpy.random.Generator.bit_generator.html#numpy.random.Generator.bit_generator) to access the bit generator `from numpy.random import default_rng` `rng = default_rng()` `bit_generator = rng.bit_generator`
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update astype keyerror msg
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CONTRIBUTOR
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Hi! This is extremely minor and i just quickly did it in codespaces but I ran into this a few times and I thought it might be helpful for others.
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Fix 'rtol' and 'atol' for numeric extension types
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- [ ] closes #xxxx - [x] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [ ] whatsnew entry cc @stefansorgqc
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"2021-11-20T07:28:42Z"
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deprecation warning regarding ambiguous boolean of empty array (numpy)
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I_kwDOAA0YD84-5jjQ
44,490
ENH: Warning with only one column used in `apply` causing performance issues
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#### Is your feature request related to a problem? From what I've seen in python classes: Handling a huge data frame, especially beginners using `apply` on huge data frames don't know that it loads the whole frame while looping. [Example](https://stackoverflow.com/a/62968313): Consider following function and data frame ```python import pandas as pd def complex_function(x, y=0): if x > 5 and x > y: return 1 else: return 2 df = pd.DataFrame(data={'col1': [1, 4, 6, 2, 7], 'col2': [6, 7, 1, 2, 8]}) ``` For a greater data frame, consider performance differences with ```python df['col1'] = df['col1'].apply(complex_function) ``` and the much less efficient ``` df['col1'] = df.apply(function(x) {complex_function(x['col1'])}) ``` #### Describe the solution you'd like Just a small warning that, if only one column is accessed within apply body. Something like: ``` Warning: Only one column seems to be accessed, causing performance issues ``` #### Describe alternatives you've considered We just leave it as it is, no great differences for most users
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DOCS: use non-deprecated method in doc examples
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as described
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BUG: NumericArray.__pos__ should make a copy
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- [ ] closes #xxxx - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [ ] whatsnew entry
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TST: share a bunch of test_custom_business_day
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [X] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python >>>------------------------------------------------------------------------- Warning in /home/runner/work/pandas/pandas/doc/source/user_guide/io.rst at block ending on line 3033 Specify :okwarning: as an option in the ipython:: block to suppress this message ---------------------------------------------------------------------------- /home/runner/miniconda3/envs/pandas-dev/lib/python3.8/site-packages/charset_normalizer/api.py:91: UserWarning: Trying to detect encoding from a tiny portion of (11) byte(s). warn('Trying to detect encoding from a tiny portion of ({}) byte(s).'.format(length)) <<<------------------------------------------------------------------------- and WARNING: failed to reach any of the inventories with the following issues: intersphinx inventory 'https://www.statsmodels.org/devel/objects.inv' not fetchable due to <class 'requests.exceptions.ConnectionError'>: HTTPSConnectionPool(host='www.statsmodels.org', port=443): Max retries exceeded with url: /devel/objects.inv (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7fef8dc72670>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')) ```
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this issue exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [ ] I have confirmed this issue exists on the master branch of pandas. ### Reproducible Example ``` >>> import pandas as pd >>> left = pd.DataFrame.from_dict({('A', 'a'): [0]}) >>> right = pd.DataFrame.from_dict({('B', 'b'): [1]}) >>> left.merge(right, how='cross') PerformanceWarning: dropping on a non-lexsorted multi-index without a level parameter may impact performance. obj = obj._drop_axis(labels, axis, level=level, errors=errors) A B a b 0 0 1 ``` It is neither `left.columns` nor `right.columns` that has `_lexsort_depth == 0`. Some MultiIndex created during the merge is not sorted (and/or dropped without a level parameter). I don't know if this actually affects performance or is better described as a bug. ### Installed Versions INSTALLED VERSIONS ------------------ commit : 945c9ed766a61c7d2c0a7cbb251b6edebf9cb7d5 python : 3.8.10.final.0 python-bits : 64 OS : Linux OS-release : 5.11.0-27-generic Version : #29~20.04.1-Ubuntu SMP Wed Aug 11 15:58:17 UTC 2021 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : None LOCALE : en_US.UTF-8 pandas : 1.3.4 numpy : 1.21.4 pytz : 2021.3 dateutil : 2.8.2 pip : 21.2.4 setuptools : 57.4.0 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 fsspec : None fastparquet : None gcsfs : None matplotlib : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pyxlsb : None s3fs : None scipy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : None ### Prior Performance _No response_
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"2021-11-20T18:02:43Z"
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- [x] closes #44470 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [x] whatsnew entry
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df[col].dtype==object reverts back to df[col].dtype==datetime upon df.replace({np.nan: None})
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I explicitly coerce the dtype==datetime of a column containing NaT and datetimes (call it: DateTimeCol) to be of type object so that I can convert NaT to None (because Django complains about it). Then later during the workflow, when I have a need to replace all other NaN to None (because Django also compalins about it) using df.replace({np.nan: None}), the DateTimeCol is retransformed back into a type: datetime automatically without it explicit input and the NaT are present again which forces django to complain. Surely this is not a wanted behaviour. ` # pre replace 0 None 1 None 2 None 3 None 4 None ... 163 2013-12-19 16:30:00+01:00 164 2013-12-19 16:30:00+01:00 165 2013-12-19 16:30:00+01:00 166 2013-12-19 16:30:00+01:00 167 2013-12-19 16:30:00+01:00 Name: Tempering DateTime, Length: 168, dtype: object df.replace({np.nan: None}) # post replace 0 NaT 1 NaT 2 NaT 3 NaT 4 NaT ... 163 2013-12-19 16:30:00+01:00 164 2013-12-19 16:30:00+01:00 165 2013-12-19 16:30:00+01:00 166 2013-12-19 16:30:00+01:00 167 2013-12-19 16:30:00+01:00 Name: Tempering DateTime, Length: 168, dtype: datetime64[ns, Europe/Berlin] `
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BUG: Pandas DataFrame replace() doesn't work if the dataframe has nullable boolean columns
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"2021-11-20T16:15:51Z"
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [X] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python import pandas as pd df = pd.DataFrame({"a": ["x", "y", "z", "w"], "b": [True, False, False, True]}).astype({"b":"boolean"}) df.replace("x", "X") ``` ### Issue Description When trying to use `pandas.DataFrame.replace()` on a dataframe with several columns including boolean columns where the `boolean` (i.e. nullable) dtype has been set explicitly beforehand. When running the above snippet I get the following error: ``` File "C:\users\el_caminooooo\playground\venv/lib/python3.7/site-packages/pandas/core/arrays/boolean.py", line 265, in __init__ "values should be boolean numpy array. Use " TypeError: values should be boolean numpy array. Use the 'pd.array' function instead ``` Is this a pandas bug?. Also please note both of the following work fine: ```python import pandas as pd df = pd.DataFrame({"a": ["x", "y", "z", "w"], "b": [True, False, False, True]}).astype({"b":"bool"}) # notice 'bool' instead of 'boolean' df.replace("x", "X") ``` and: ```python df = pd.DataFrame({"a": ["x", "y", "z", "w"], "b": [True, False, False, True]}) df.replace("x", "X") ``` ### Expected Behavior the replace should complete successfully ### Installed Versions <details> INSTALLED VERSIONS ------------------ commit : 7c48ff4409c622c582c56a5702373f726de08e96 python : 3.7.10.final.0 python-bits : 64 OS : Linux OS-release : 3.10.0-957.27.2.el7.x86_64 Version : #1 SMP Mon Jul 29 17:46:05 UTC 2019 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.3.4 numpy : 1.21.0 pytz : 2021.1 dateutil : 2.8.1 pip : 21.3.1 setuptools : 47.1.0 Cython : 0.29.23 pytest : 6.2.5 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : 4.6.3 html5lib : None pymysql : None psycopg2 : None jinja2 : 3.0.1 IPython : None pandas_datareader: 0.10.0 bs4 : None bottleneck : None fsspec : 2021.08.1 fastparquet : 0.7.0 gcsfs : None matplotlib : 3.4.2 numexpr : None odfpy : None openpyxl : 3.0.9 pandas_gbq : None pyarrow : 4.0.0 pyxlsb : None s3fs : None scipy : 1.6.3 sqlalchemy : None tables : None tabulate : 0.8.9 xarray : None xlrd : None xlwt : None numba : None</details>
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TYP: changed variable new_pd_index to final_pd_index
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xref #37715 Changed variable new_pd_index to final_pd_index in line 2099 Handled mypy type ignore[assignment] error in pandas/io/pytables.py in line 2099
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(TST) Replacing Timestamp.now () in tests.
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CONTRIBUTOR
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- [x] xref #44341 - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [ ] whatsnew entry Replacing Timestamp.now() in tests. Left Timestamp.now () in the following tests: ``` scalar/timestamp/test_timestamp.py:290: compare(Timestamp.now(), datetime.now()) scalar/timestamp/test_timestamp.py:291: compare(Timestamp.now("UTC"), datetime.now(timezone("UTC"))) scalar/timestamp/test_timestamp.py:320: compare(Timestamp.now(), datetime.now()) scalar/timestamp/test_timestamp.py:321: compare(Timestamp.now("UTC"), datetime.now(tzutc())) scalar/timestamp/test_constructors.py:480: ts_from_method = Timestamp.now() scalar/timestamp/test_constructors.py:484: ts_from_method_tz = Timestamp.now(tz="US/Eastern") ```
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Adds a very basic, skeletal method for writing `Styler` to string using the mechanics already in place and a very basic jinja2 template. Whilst of limited use in its current form it may be useful later and/or maybe able to eliminate other parts of the dataframe string `repr` formatting.
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cleans up some of my placeholder bullets
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BUG: pd.Timedelta breaks hash invariant
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [ ] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python import pandas as pd import numpy as np pd_td = pd.Timedelta(0) np_td = np.timedelta64(0) # One of these should be true assert (pd_td == np_td and hash(pd_td) == hash(np_td)) or pd_td != np_td ``` ### Issue Description Ref: https://bugs.python.org/issue45832 I was prompted by @rhettinger to bring this up with you. `pd.Timedelta` and `np.timedelta64` are in violation of the python [hash invariant](https://docs.python.org/3/glossary.html#term-hashable). Specifically: > Hashable objects which compare equal must have the same hash value. ### Expected Behavior ```py # Should pass assert (pd_td == np_td and hash(pd_td) == hash(np_td)) or pd_td != np_td ``` ### Installed Versions <details> INSTALLED VERSIONS ------------------ commit : 945c9ed766a61c7d2c0a7cbb251b6edebf9cb7d5 python : 3.10.0.final.0 python-bits : 64 OS : Darwin OS-release : 21.1.0 Version : Darwin Kernel Version 21.1.0: Wed Oct 13 17:33:23 PDT 2021; root:xnu-8019.41.5~1/RELEASE_X86_64 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : None LOCALE : en_US.UTF-8 pandas : 1.3.4 numpy : 1.21.1 pytz : 2021.3 dateutil : 2.8.2 pip : 21.3.1 setuptools : 58.3.0 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 3.0.3 IPython : 7.29.0 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 : 6.0.0 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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REF: combine isnaobj+isnaobj_old
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- [x] closes #44304 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [x] whatsnew entry
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BUG: Period incorrectly allowing np.timedelta64('NaT')
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- [ ] closes #xxxx - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [x] whatsnew entry
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to_sql just keeps on loading ?
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I have used pandas.to_sql statement to store data(200 rows X 8 columns) of csv file to postgres database but it just keeps on loading for a while, however it runs perfectly when I use if_exists='append'. I have checked everything but not able to find the issue.Can someone help ? ``` username = session['username'] user_path = os.path.join("user_data",username) userdb = username + "DB.db" con = sqlite3.connect(Path(user_path,userdb)) con.row_factory = sqlite3.Row cur = con.cursor() cur.execute("select * from data") data = cur.fetchall() con.close() if request.method == 'POST': uploadExcel = request.files['uploadExcel'] if uploadExcel.filename != '': filepath = os.path.join( user_path , uploadExcel.filename) if os.path.exists(filepath): flash("The file with the same name already exists !","danger") else: uploadExcel.save(filepath) con = sqlite3.connect(Path(user_path,userdb)) cur = con.cursor() cur.execute("insert into data(exceldata)values(?)", (uploadExcel.filename,)) con.commit() flash("Excel Sheet Uploaded Successfully", "success") con = sqlite3.connect(Path(user_path,userdb)) con.row_factory = sqlite3.Row cur = con.cursor() cur.execute("select * from data") data = cur.fetchall() for val in data: path = os.path.join(user_path, uploadExcel.filename) print(path) engine = sqlalchemy.create_engine("postgresql+psycopg2://postgres:falcon123@localhost:5432/SankovFAAS") df = pd.read_csv(path,index_col=False) print(df) df.to_sql('user_data',engine,if_exists='replace', method='multi',index=False) print("done") con.close() return render_template("ExcelUpload.html", data=data, username=session['username'], page_title=" Upload") ```
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BUG: pd.DataFrame.columns.insert( -1: <name>) does not insert in last position
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [X] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python import pandas as pd df = pd.DataFrame(columns = ["A", "B"]) col = df.columns.insert(-1, "C") print(col) df = pd.DataFrame( columns = col) print(df.columns) ``` ### Issue Description the method index.insert does not allow to insert a value last. `loc=-1` gives an insertion at the second last place 'loc=0=-0' gives an insertion at 1st place ### Expected Behavior The method index.insert should follow the standard loc function and 'loc=-1' should insert the item last in the index ### Installed Versions <details> INSTALLED VERSIONS ------------------ commit : 945c9ed766a61c7d2c0a7cbb251b6edebf9cb7d5 python : 3.8.10.final.0 python-bits : 64 OS : Linux OS-release : 5.4.129+ Version : #1 SMP Wed Aug 18 19:58:18 PDT 2021 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : None LOCALE : en_US.UTF-8 pandas : 1.3.4 numpy : 1.21.3 pytz : 2021.3 dateutil : 2.8.2 pip : 20.0.2 setuptools : 45.2.0 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 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 pyxlsb : None s3fs : None scipy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : None None </details>
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xref https://github.com/pandas-dev/pandas/pull/44426#issuecomment-972699248
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xref #37715 Changed variable name from vals to array_vals in pandas/core/index/multi.py: 705 and 706 To remove type: ignore[assignment] mypy error Changed variable name from m to mapped_result in pandas/core/index/multi.py: 3121 Removed type: ignore[assignment] mypy error in line 3126 and 3131
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DOC: DataFrameGroupBy.diff() returns no columns used for grouping
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [X] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python import pandas as pd dates = pd.date_range("2020-01-01", "2020-01-02").values availability = pd.DataFrame({'product': ['a', 'a', 'b', 'b'], 'timestamp': np.append(dates, dates), 'stock': [10, 5, 10, 10] }) (availability.set_index('timestamp') .groupby('product').diff() ) ``` ### Issue Description Using with `groupby(grouping_columns).diff()` leads to `grouping_columns` columns being missing in the output. ### Expected Behavior Expected behaviour: having 'product' in the index. ``` stock product timestamp a 2020-01-01 NaN 2020-01-02 -5.0 b 2020-01-01 NaN 2020-01-02 0.0 ``` ### Installed Versions INSTALLED VERSIONS ------------------ commit : 945c9ed766a61c7d2c0a7cbb251b6edebf9cb7d5 python : 3.8.10.final.0 pandas : 1.3.4 numpy : 1.20.3
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xref #37715 Changed variable name `repeats` to `ensured_repeats` pandas/core/indexes/multi.py: 2161 and 2167 Removed type[ignore] assignment and mypy error comment.
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- [ ] closes #xxxx - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [x] whatsnew entry Same yak-shaving as #44495 (which turned out to be a dead end for this particular yak, but still a perf bump)
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [ ] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python import pandas as pd df = pd.DataFrame([NaN,*range(5),1000],columns=['col1']) df.update(df.loc[:,df.columns != 'some_column'].pct_change(-1)) print(df) ``` ### Issue Description This code without `df.update` will make the last row of the dataset filled with `NaN` values, however when an `update` is made the row remains unchanged. is this a normal behavior of pandas ? shouldn't the row be updated to `Nan` ? ### Expected Behavior return last row with `NaN` ### Installed Versions INSTALLED VERSIONS ------------------ commit : 73c68257545b5f8530b7044f56647bd2db92e2ba python : 3.9.7.final.0 python-bits : 64 OS : Darwin OS-release : 21.1.0 Version : Darwin Kernel Version 21.1.0: Wed Oct 13 17:33:24 PDT 2021; root:xnu-8019.41.5~1/RELEASE_ARM64_T8101 machine : arm64 processor : arm byteorder : little LC_ALL : None LANG : en_GB.UTF-8 LOCALE : en_GB.UTF-8 pandas : 1.3.3 numpy : 1.21.2 pytz : 2021.3 dateutil : 2.8.2 pip : 21.2.4 setuptools : 58.0.4 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 3.0.1 IPython : 7.28.0 pandas_datareader: None bs4 : None bottleneck : None fsspec : None fastparquet : None gcsfs : None matplotlib : 3.4.3 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pyxlsb : None s3fs : None scipy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : None None
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [X] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python Make a PR that launches the workflow ``` ### Issue Description I have been looking at updating some documentation and been pushing the PR for review. Although code was approved, there are still some checks that are not passing (and they are not for many other pull requests so my case does not seem to be isolated). The error that appears is in the CI/Web and docs workflow: ``` /home/runner/miniconda3/envs/pandas-dev/lib/python3.8/site-packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h:17:2: warning: #warning "Using deprecated NumPy API, disable it with " "#define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-Wcpp] 17 | #warning "Using deprecated NumPy API, disable it with " \ | ^~~~~~~ WARNING: >>>------------------------------------------------------------------------- Warning in /home/runner/work/pandas/pandas/doc/source/user_guide/io.rst at block ending on line 3033 Specify :okwarning: as an option in the ipython:: block to suppress this message ---------------------------------------------------------------------------- /home/runner/miniconda3/envs/pandas-dev/lib/python3.8/site-packages/charset_normalizer/api.py:91: UserWarning: Trying to detect encoding from a tiny portion of (11) byte(s). warn('Trying to detect encoding from a tiny portion of ({}) byte(s).'.format(length)) <<<------------------------------------------------------------------------- ``` which triggers a warning that is considered as an error since we pass the `--warnings-are-errors` in the `doc/make.py --warnings-are-errors | tee sphinx.log ; exit ${PIPESTATUS[0]}` command to build the documentation ### Expected Behavior Tests should be passing without issues (has been passing in the past without issues, not sure what is breaking the tests now). Latest changes on the file `doc/source/user_guide/io.rst` do not seem to impact this section ### Installed Versions <details> INSTALLED VERSIONS ------------------ commit : c2587f807cbaaf16585fa293e9b1ec41cef1b511 python : 3.8.12.final.0 python-bits : 64 OS : Linux OS-release : 4.19.104-microsoft-standard Version : #1 SMP Wed Feb 19 06:37:35 UTC 2020 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : C.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.4.0.dev0+1158.gc2587f807c numpy : 1.21.4 pytz : 2021.3 dateutil : 2.8.2 pip : 21.3.1 setuptools : 59.1.1 Cython : 0.29.24 pytest : 6.2.5 hypothesis : 6.24.6 sphinx : 4.3.0 blosc : None feather : None xlsxwriter : 3.0.2 lxml.etree : 4.6.4 html5lib : 1.1 pymysql : None psycopg2 : None jinja2 : 3.0.3 IPython : 7.29.0 pandas_datareader: None bs4 : 4.10.0 bottleneck : 1.3.2 fsspec : 2021.11.0 fastparquet : 0.7.1 gcsfs : 2021.11.0 matplotlib : 3.5.0 numexpr : 2.7.3 odfpy : None openpyxl : 3.0.9 pandas_gbq : None pyarrow : 6.0.1 pyxlsb : None s3fs : 2021.11.0 scipy : 1.7.2 sqlalchemy : 1.4.27 tables : 3.6.1 tabulate : 0.8.9 xarray : 0.18.2 xlrd : 2.0.1 xlwt : 1.3.0 numba : 0.53.1 </details>
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"2021-11-18T19:23:08Z"
"2021-11-18T19:23:45Z"
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### - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [ ] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python import pandas as pd nan = float('nan') df = pd.DataFrame([ [1, 2, 1], [1, 2, 2], [2, nan, 3], [2, nan, 4], [3, 3, 5],], columns=["a", "b", "c"]) gb = df.groupby(["a", "b"], dropna=False) filtered = gb.filter(lambda x: len(x) > 1) print(filtered) # a b c # 0 1 2.0 1 # 1 1 2.0 2 # Expecting: # a b c # 0 1 2.0 1 # 1 1 2.0 2 # 2 2 NaN 3 # 3 2 NaN 4 # Note that there is no problem with agg: print() agged = gb.agg(len) print(agged) # c # a b # 1 2.0 2 # 2 NaN 2 # 3 3.0 1 ``` ### Issue Description When using `groupby()` and then applying a filter, if the group values include a `NaN`, those rows are *always dropped*! If you add `dropna=False` to the `filter` call, it just fills them with NaNs. ### Expected Behavior `NaN`s should be treated as unique values rather than dropped automatically. ### Installed Versions <details> INSTALLED VERSIONS ------------------ commit : 945c9ed766a61c7d2c0a7cbb251b6edebf9cb7d5 python : 3.9.4.final.0 python-bits : 64 OS : Linux OS-release : 5.14.16-arch1-1 machine : x86_64 processor : byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.3.4 numpy : 1.21.4 pytz : 2021.3 dateutil : 2.8.2 pip : 21.3.1 setuptools : 58.3.0 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 fsspec : None fastparquet : None gcsfs : None matplotlib : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : 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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- [x] closes #42505 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [ ] whatsnew entry @simonjayhawkins where does the whatsnew for this go?
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"2021-11-19T00:16:00Z"
"2021-11-20T00:11:39Z"
"2021-11-20T00:11:39Z"
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](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas. - [X] I have confirmed this bug exists on the master branch of pandas. ### Reproducible Example ```python Create a PR the workflows will run and in the `Test experimental data manager (slow)` workflow it it will return an exit code 1 Launch `pytest pandas/tests/plotting/test_hist_method.py pandas/tests/plotting/test_series.py pandas/tests/plotting/frame/test_hist_box_by.py` All tests used to pass a week or so ago, now it is failing (and failing in many different PRs, does not look like an isolate case). ``` ### Issue Description The following tests are consistently failing on local installation or in the CI/CD pipeline. ``` =========================== short test summary info ============================ FAILED pandas/tests/plotting/test_hist_method.py::TestDataFrameGroupByPlots::test_axis_share_x FAILED pandas/tests/plotting/test_hist_method.py::TestDataFrameGroupByPlots::test_axis_share_y FAILED pandas/tests/plotting/test_hist_method.py::TestDataFrameGroupByPlots::test_axis_share_xy FAILED pandas/tests/plotting/test_series.py::TestSeriesPlots::test_area_sharey_dont_overwrite FAILED pandas/tests/plotting/frame/test_frame.py::TestDataFramePlots::test_area_sharey_dont_overwrite FAILED pandas/tests/plotting/frame/test_hist_box_by.py::TestHistWithBy::test_axis_share_x_with_by FAILED pandas/tests/plotting/frame/test_hist_box_by.py::TestHistWithBy::test_axis_share_y_with_by ``` ### Expected Behavior Tests should pass ### Installed Versions <details> INSTALLED VERSIONS ------------------ commit : 8c4bd0e0c3698ced1420c41d33bac9f0e8fb4916 python : 3.8.12.final.0 python-bits : 64 OS : Linux OS-release : 4.19.104-microsoft-standard Version : #1 SMP Wed Feb 19 06:37:35 UTC 2020 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : C.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.4.0.dev0+1144.g8c4bd0e0c3.dirty numpy : 1.21.4 pytz : 2021.3 dateutil : 2.8.2 pip : 21.3.1 setuptools : 59.1.1 Cython : 0.29.24 pytest : 6.2.5 hypothesis : 6.24.6 sphinx : 4.3.0 blosc : None feather : None xlsxwriter : 3.0.2 lxml.etree : 4.6.4 html5lib : 1.1 pymysql : None psycopg2 : None jinja2 : 3.0.3 IPython : 7.29.0 pandas_datareader: None bs4 : 4.10.0 bottleneck : 1.3.2 fsspec : 2021.11.0 fastparquet : 0.7.1 gcsfs : 2021.11.0 matplotlib : 3.5.0 numexpr : 2.7.3 odfpy : None openpyxl : 3.0.9 pandas_gbq : None pyarrow : 6.0.1 pyxlsb : None s3fs : 2021.11.0 scipy : 1.7.2 sqlalchemy : 1.4.27 tables : 3.6.1 tabulate : 0.8.9 xarray : 0.18.2 xlrd : 2.0.1 xlwt : 1.3.0 numba : 0.53.1 </details>
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"2021-11-19T00:41:30Z"
"2021-11-20T21:30:54Z"
"2021-11-20T20:46:44Z"
MEMBER
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- [ ] closes #xxxx - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them - [x] whatsnew entry Gives us the flexibility to consolidate the logic in `__add__`
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