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DOC: Add instructions how to activate virtual env under windows with pip
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5
2019-10-20T10:42:45Z
2019-11-01T23:18:38Z
2019-11-01T23:18:32Z
CONTRIBUTOR
null
Contributing.rst now correctly describes how to setup dev environment under Windows when using pip and not conda. Closes #29112 - [x] closes #29112 - [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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Fix typing errors
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2
2019-10-20T16:52:55Z
2019-10-21T18:08:17Z
2019-10-20T22:27:42Z
CONTRIBUTOR
null
- [x] closes subtask of #28926 - [x] tests passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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Fix typing errors
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2019-10-20T16:58:06Z
2019-10-21T17:21:27Z
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CONTRIBUTOR
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- [x] closes a subtask of #28926 - [x] tests passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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ENH: Implement Keyword Aggregation for DataFrame.agg and Series.agg
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2019-10-20T17:27:21Z
2020-07-10T19:32:45Z
2020-07-10T19:16:29Z
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- [x] closes #26513, related to #28380 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry This PR basically deals with three issue: 1. implement keyword aggregation for DataFrame.agg 2. implement keyword aggregation for Series.agg
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REF: avoid getattr pattern for join_indexer
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2019-10-20T17:54:56Z
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ENH: Add built-in function for Styler to format the text displayed for missing values
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13
2019-10-20T18:49:38Z
2019-11-25T13:54:34Z
2019-11-25T13:54:22Z
CONTRIBUTOR
null
As described in the issues, user who wants to control how NA values are printed while applying styles to the output will have to implement their own formatter. (so that the underlying data will not change and can be used for styling) Since the behavior is common in styling (for reports etc.), suggest to add this shortcut function to enable users format their NA values as something like '--' or 'Not Available' easily. EDIT: - Change implementation to integrate with the original `.format()` using `na_rep` argument - Add a new table-wise default `na_rep` setting, which can be set through `.set_na_rep()` - Minor fix: formatter should be wrapped outside of locs-loop - Added a few user guide examples and test cases example usage: `df.style.highlight_max().format(None, na_rep="-")` - [x] closes #21527 and #28358 - [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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29,119
mypy Fix for tests\frame\test_constructors
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2019-10-20T20:36:12Z
2019-10-21T06:29:11Z
2019-10-21T06:29:11Z
NONE
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- [x] closes one subtask of #28926 - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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REF: avoid getattr pattern for diff_2d; use fused types
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2019-10-20T23:12:25Z
2019-10-23T23:08:47Z
2019-10-22T12:31:51Z
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REF: avoid getattr pattern for unstack, assorted cleanups
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3
2019-10-20T23:14:47Z
2019-10-22T15:04:44Z
2019-10-22T12:32:51Z
MEMBER
null
Remove the only "FIXME" left in the cython code
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Make color validation more forgiving
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9
2019-10-20T23:48:28Z
2020-04-27T15:34:39Z
2019-11-10T14:44:10Z
CONTRIBUTOR
null
The current version throws a false positive if the style string contains `s` or `o`, which are valid marker styles and not colors. For example: ``` style='s', color='C3' ``` should be legal, but currently throws an error. My suggestion is to check for only the letters that are color codes. - [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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1
2019-10-21T03:09:44Z
2019-10-21T03:46:42Z
2019-10-21T03:44:54Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd df = pd.read_csv('file.csv') ``` #### Problem description The problem I ran into is that it's telling me that read_csv is not a thing, I'm not sure what's going on here. ![image](https://user-images.githubusercontent.com/20232318/67173824-922af700-f385-11e9-8c8e-0dd3c03049e4.png) #### Expected Output ? #### Output of ``pd.show_versions()`` ![image](https://user-images.githubusercontent.com/20232318/67174042-3dd44700-f386-11e9-8584-bd0fa750cfd6.png) <details> [paste the output of ``pd.show_versions()`` here below this line] </details>
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29,124
Fixed Inconsistent GroupBy Output Shape with Duplicate Column Labels
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34
2019-10-21T05:23:50Z
2020-01-16T00:35:20Z
2019-11-20T13:00:47Z
MEMBER
null
- [X] closes #21668 (and potentially a few others) - [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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29,125
Unify error messages when opening inexistent excel/csv file
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2
2019-10-21T06:17:06Z
2020-05-02T04:35:21Z
null
NONE
null
Similar to https://github.com/pandas-dev/pandas/issues/29102, excel and csv file extensions now have inconsistent errors for nonexistent files. ``` import pandas as pd pd.read_csv('file_1.csv') IOError: [Errno 2] File file_1.csv does not exist: 'file_1.csv' pd.read_excel('file_2.xlsx') IOError: [Errno 2] No such file or directory: 'file_2.xlsx' ``` Would be better to have a uniform error message across multiple file extensions, like the one with json in https://github.com/pandas-dev/pandas/pull/29104: ``` FileNotFoundError: File 'no_file.json' does not exist ```
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CLN: remove versionadded:: 0.20
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1
2019-10-21T11:38:21Z
2019-10-22T19:05:31Z
2019-10-22T12:23:12Z
MEMBER
null
xref https://github.com/pandas-dev/pandas/pull/27463#issuecomment-513492615
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2019-10-21T11:39:19Z
2019-10-22T19:05:15Z
2019-10-22T09:01:03Z
MEMBER
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xref https://github.com/pandas-dev/pandas/pull/27463#issuecomment-513492615
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510,002,250
MDU6SXNzdWU1MTAwMDIyNTA=
29,128
Variance of nullable Int64 ignores ddof argument
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1
2019-10-21T14:31:14Z
2019-11-19T04:23:55Z
2019-11-19T04:23:55Z
NONE
null
Variance calculation `Series.var()` is ignoring the `ddof` argument for nullable integer type `Int64`. Behavior should match that of `float` type. ```python >>> pd.__version__ '0.25.1' >>> np.__version__ '1.17.2' >>> s1 = pd.Series(data=[1,2,3,4,5,6,np.nan,np.nan]) >>> series.var(ddof=0) 3.5 >>> s1 = pd.Series(data=[1,2,3,4,5,6,np.nan,np.nan]) >>> s1.var(ddof=0) 2.9166666666666665 >>> s1.var(ddof=1) 3.5 >>> s2 = pd.Series(data=[1,2,3,4,5,6,np.nan,np.nan], dtype="Int64") >>> s2.var(ddof=0) 3.5 >>> s2.var(ddof=1) 3.5 ```
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29,129
Using groupby with nlargest drops the groupby column if there is only one element per group
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2
2019-10-21T14:48:38Z
2021-08-05T23:33:54Z
2021-08-05T23:33:54Z
NONE
null
Apologies if this has been fixed in 0.25.2, it's not in the repository yet. #### Code Sample ```python import pandas as pd df = pd.DataFrame({'C1':['abc','def'],'C2':[2,1]}) print(df.groupby("C1").C2.nlargest(1).reset_index()) df = pd.DataFrame({'C1':['abc','abc','def','def'],'C2':[2,3,2,1]}) print(df.groupby("C1").C2.nlargest(1).reset_index()) ``` #### Problem description Result of the first part, the C1 column is gone and there is an index column: ``` index C2 0 0 2 1 1 1 ``` Result of the second part, the C1 column is there and there is a level_1 column: ``` C1 level_1 C2 0 abc 1 3 1 def 2 2 ``` #### Expected Output I'm expecting the first output to have the same format as the second, that is the groupby not dropping its groupby-column. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.7.4.final.0 python-bits : 64 OS : Linux OS-release : 4.19.79-1-MANJARO machine : x86_64 processor : byteorder : little LC_ALL : None LANG : de_DE.utf8 LOCALE : de_DE.UTF-8 pandas : 0.25.1 numpy : 1.17.2 pytz : 2019.3 dateutil : 2.8.0 pip : 19.2.3 setuptools : 41.2.0 Cython : None pytest : None hypothesis : None sphinx : 2.2.0 blosc : None feather : None xlsxwriter : None lxml.etree : 4.4.1 html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : 7.6.1 pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : 4.4.1 matplotlib : 3.1.1 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None s3fs : None scipy : 1.3.1 sqlalchemy : None tables : None xarray : None xlrd : None xlwt : None xlsxwriter : None </details>
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510,048,782
MDU6SXNzdWU1MTAwNDg3ODI=
29,130
merge_asof() returns cryptic error with bad argument types
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4
2019-10-21T15:26:27Z
2021-06-07T13:09:02Z
2021-01-06T00:16:28Z
NONE
null
`merge_asof` arguments have to ["...be a numeric column, such as datetimelike, integer, or float"](https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.merge_asof.html) but gives cryptic `TypeError` instead of `ValueError` on bad argument types? ```python import pandas as pd left = pd.Series(['2019-06-01 00:09:12', '2019-06-01 00:10:29', '2019-06-01 00:20:30'], name='time') right = pd.Series(['2019-06-01 00:01:12', '2019-06-01 00:01:12', '2019-06-01 00:01:12'], name='time') pd.merge_asof(left, right) ``` Output: ``` ... TypeError: No matching signature found ``` versus e.g. ```python import pandas as pd left = pd.Series(['2019-06-01 00:09:12', '2019-06-01 00:10:29', '2019-06-01 00:20:30'], name='time') right = pd.Series(['2019-06-01 00:01:12', '2019-06-01 00:01:12', '2019-06-01 00:01:12'], name='time') left = pd.to_datetime(left, infer_datetime_format=True) right = pd.to_datetime(right, infer_datetime_format=True) pd.merge_asof(left, right) ```
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510,049,894
MDExOlB1bGxSZXF1ZXN0MzMwNDc5NTY5
29,131
[BUG] Fixed behavior of DataFrameGroupBy.apply to respect _group_selection_context
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14
2019-10-21T15:27:45Z
2020-06-14T15:37:45Z
2020-06-14T15:37:45Z
CONTRIBUTOR
null
- [x] closes #28549 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry This issue needs to be addressed before #28541 can be merged
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510,056,375
MDU6SXNzdWU1MTAwNTYzNzU=
29,132
NDFrame.interpolate(): variable 'ax' not assigned when axis='index'
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4
2019-10-21T15:34:56Z
2019-10-25T13:06:30Z
2019-10-25T13:06:30Z
CONTRIBUTOR
null
The `NDFrame.interpolate` function fails when passing a string as axis. Example: ```python >>> import numpy as np >>> import pandas as pd >>> df = pd.DataFrame(np.zeros((3,2)), columns=['a','b']) >>> df.iloc[1] = np.nan >>> df a b 0 0.0 0.0 1 NaN NaN 2 0.0 0.0 >>> df.interpolate(axis=0) a b 0 0.0 0.0 1 0.0 0.0 2 0.0 0.0 >>> df.interpolate(axis='index') Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/Users/lehanson/anaconda3/envs/plots/lib/python3.7/site-packages/pandas/core/generic.py", line 7006, in interpolate ax = _maybe_transposed_self._get_axis_number(ax) UnboundLocalError: local variable 'ax' referenced before assignment ``` From the documentation and from the function itself, it looks like `df.interpolate(axis='index')` was intended to work, but that maybe someone accidentally deleted a line in generic.py? The function seems to work properly if I add `ax = axis` in the else block here: https://github.com/pandas-dev/pandas/blob/171c71611886aab8549a8620c5b0071a129ad685/pandas/core/generic.py#L6998-L7006 I am using pandas version 0.25.1
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510,080,772
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29,133
Reduce Circular Imports with pandas.core.reshape.concat
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10
2019-10-21T16:03:54Z
2020-01-16T00:33:46Z
2019-11-07T01:39:35Z
MEMBER
null
While working on #29124 I found a lot of general uses for this, but had to keep importing in the function body to prevent circular imports. By switching the isinstance checks to using ABC classes and moving the import of Index objects those circular imports can *mostly* be done away with The only thing left that was causing circular imports was in the `Categorical` space. Can try to figure that out later, though cc @TomAugspurger in case that's a path that has already been gone down
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510,091,986
MDExOlB1bGxSZXF1ZXN0MzMwNTE2MDMw
29,134
Improve performance of equality comparison between a simple Index and a MultiIndex
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3
2019-10-21T16:17:58Z
2019-12-05T19:52:48Z
2019-12-05T19:52:27Z
CONTRIBUTOR
null
Previously, Index.equals(MultiIndex) and MultiIndex.equals(Index) both involved converting the MultiIndex into an ndarray. Since this conversion requires resolving MultiIndex's by-reference structure (i.e. its codes + levels) into ndarray's by-value structure, it can be substantially computationally expensive. However, it is only possible for a simple Index to equal a MultiIndex in two cases: - the MultiIndex has only `1` level - the MultiIndex has `d` levels, and the Index is an object index of size-`d` sequences (e.g. `d`-tuples) Thus, if the Index is not object-typed, and its nlevels differs from that of the MultiIndex, then the two are determined to be unequal without ndarray conversion. MWE: ```python import pandas as pd long_cheap_index = pd.RangeIndex(1000000) short_expensive_index = pd.IntervalIndex( [pd.Interval(pd.Timestamp(2018, 10, 1), pd.Timestamp(2018, 10, 2))]) large_expensive_multiindex = pd.MultiIndex.from_product( [long_cheap_index, short_expensive_index]) trivial_simple_index = pd.Int64Index([]) # These operations no longer convert large_expensive_multiindex into an ndarray # Previously, each took ~10 s; now, ~0.02 ms large_expensive_multiindex.equals(trivial_simple_index) trivial_simple_index.equals(large_expensive_multiindex) ``` - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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combine_first: 'DataFrame' object has no attribute 'dtype' with duplicate columns
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8
2019-10-21T16:22:32Z
2021-09-07T10:28:37Z
null
NONE
null
#### Code Sample, a copy-pastable example if possible ```python df1 = pd.DataFrame([[1,np.nan],[3,4]], columns=['P','Q'], index=['A', 'B']) df2 = pd.DataFrame([[5,6,7],[8,9,np.nan]], columns=['P','Q','Q'], index=['A', 'B']) df1.combine_first(df2) # or alternatively: df2.combine_first(df1) ``` #### Problem description The above call results in `AttributeError: 'DataFrame' object has no attribute 'dtype'` which is difficult to interpret. Under the hood the set logic tries to maintain dtype but the duplicate column label results in finding a `DataFrame` instead of a `Series`. The former has no `dtype` but `dtypes`. #### Expected Output Performing some calculation, e.g., ``` P Q Q A 1 6.0 7.0 B 3 4.0 4.0 ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit: None python: 3.7.3.final.0 python-bits: 64 OS: Windows OS-release: 10 machine: AMD64 processor: Intel64 Family 6 Model 60 Stepping 3, GenuineIntel byteorder: little LC_ALL: None LANG: None LOCALE: None.None pandas: 0.24.2 pytest: 5.0.1 pip: 19.1.1 setuptools: 41.0.1 Cython: 0.29.12 numpy: 1.16.4 scipy: 1.2.1 pyarrow: None xarray: None IPython: 7.6.1 sphinx: 2.1.2 patsy: 0.5.1 dateutil: 2.8.0 pytz: 2019.1 blosc: None bottleneck: 1.2.1 tables: 3.5.2 numexpr: 2.6.9 feather: None matplotlib: 3.1.0 openpyxl: 2.6.2 xlrd: 1.2.0 xlwt: 1.3.0 xlsxwriter: 1.1.8 lxml.etree: 4.3.4 bs4: 4.7.1 html5lib: 1.0.1 sqlalchemy: 1.3.5 pymysql: None psycopg2: None jinja2: 2.10.1 s3fs: None fastparquet: None pandas_gbq: None pandas_datareader: None gcsfs: None </details>
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29,136
DataFrame.rename only validates column arguments
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0
2019-10-21T18:35:29Z
2020-01-09T21:04:27Z
2020-01-09T21:04:27Z
MEMBER
null
Found this while trying to clean up axis handling in core.generic This fails as you would hope ```python >>> df = pd.DataFrame([[1]]) >>> df.rename({0: 1}, columns={0: 2}, axis=1) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/Users/williamayd/clones/pandas/pandas/util/_decorators.py", line 235, in wrapper return func(*args, **kwargs) File "/Users/williamayd/clones/pandas/pandas/core/frame.py", line 4143, in rename axes = validate_axis_style_args(self, args, kwargs, "mapper", "rename") File "/Users/williamayd/clones/pandas/pandas/util/_validators.py", line 287, in validate_axis_style_args raise TypeError(msg) TypeError: Cannot specify both 'axis' and any of 'index' or 'columns'. ``` This doesn't ```python >>> df.rename({0: 1}, index={0: 2}) 0 1 1 ``` And perhaps even more surprising is that you will get a different result depending on whether the first argument is passed by position or keyword ```python >>> df.rename(mapper={0: 1}, index={0: 2}) 0 2 1 ```
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REF: avoid getattr pattern for rank_1d, rank_2d
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1
2019-10-21T19:11:45Z
2019-10-22T15:09:59Z
2019-10-22T12:28:16Z
MEMBER
null
Also fix incorrectly-typed `nobs` in libgroupby
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MDU6SXNzdWU1MTAyMjM3MDA=
29,138
Pandas.DataFrame.to_sql() Default Insert Behavior Assumes Table Creation
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2019-10-21T19:18:27Z
2021-07-22T05:09:00Z
null
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null
#### Problem description Pandas.DataFrame.to_sql() assumes that if no table exists it should create one. In the specific case where a user wants to simply insert records, but not have to_sql() generate a table if it doesn't exist this causes problems. There is also no way to currently override the default behavior of creating a table according to the documentation. I'm running into this problem because I have an application that has to dynamically generate database tables for storage as part of an ETL pipeline where I'm using to_sql() to insert records into the tables. If for any number of reasons table creation fails during this process and no table is created, then when to_sql() is called the default behavior of Pandas.DataFrame.to_sql() is to create a new table with whatever types the fields of the dataframe are currently in. This table created by Pandas is missing all the indexes, primary/foreign keys, etc that the dynamic table generation process creates. A fix might be to add a new parameter, if_not_exists, that allows a user to set the behavior of to_sql() if a table is not detected.
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510,249,376
MDExOlB1bGxSZXF1ZXN0MzMwNjU0MzA0
29,139
CLN: remove Block._try_coerce_arg
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2
2019-10-21T19:56:42Z
2019-10-24T15:37:17Z
2019-10-24T12:10:07Z
MEMBER
null
Made possible by modernizing `libindex.convert_scalar`
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29,140
Convert DataFrame.rename to keyword only; simplify axis validation
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9
2019-10-21T21:11:20Z
2020-02-13T20:00:23Z
2020-01-09T21:04:27Z
MEMBER
null
- [X] closes #29136 and ref #17963 - [X] tests added / passed - [X] passes `black pandas` - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [X] whatsnew entry I think we can greatly simplify core if we update our assumptions around the axes of dimensions we deal with. I came to this change trying to get rid of `NDFrame._construct_axes_from_arguments` which appears to do some argument mutation that isn't very clear. This was one of the few methods that called that, while also calling `validate_axis_style_args` which is guilty of the same kind of mutation By being more explicit about the signature and converting this to keyword only arguments (which a FutureWarning detailed anyway) we can simplify the code and I think make more readable cc @TomAugspurger
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MDU6SXNzdWU1MTAzMDk1NDg=
29,141
BUG: regression on master in groupby agg with ExtensionArray
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6
2019-10-21T21:40:24Z
2019-10-23T15:50:59Z
2019-10-23T15:50:59Z
MEMBER
null
Example that I could make with DecimalArray: ``` In [1]: from pandas.tests.extension.decimal import DecimalArray, make_data In [2]: df = pd.DataFrame({'id': [0,0,0,1,1], 'decimals': DecimalArray(make_data()[:5])}) In [3]: df.groupby('id')['decimals'].agg(lambda x: x.iloc[0]) Out[8]: id 0 0.831922765262135044395108707249164581298828125 1 0.40839445887803604851029604105860926210880279... dtype: object ``` On master of a few days ago, the above returned 'decimal' dtype instead of object dtype. Found this in the geopandas test suite, as there it creates invalid output and then an error in a follow-up operation (https://travis-ci.org/geopandas/geopandas/jobs/600859374) This seems to be caused by https://github.com/pandas-dev/pandas/pull/29088, and specifically the change in `agg_series`: https://github.com/pandas-dev/pandas/pull/29088/files#diff-8c0985a9fca770c2028bed688dfc043fR653-R666 The `self._aggregate_series_fast` is giving a "AttributeError: 'DecimalArray' object has no attribute 'flags'" error if the series is backed by an EA, and the AttributeError is no longer catched. cc @jbrockmendel
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29,142
BUG: fix non-existent variable in NDFrame.interpolate
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4
2019-10-22T02:35:48Z
2019-10-25T14:08:56Z
2019-10-25T13:06:31Z
CONTRIBUTOR
null
- [x] closes #29132 - [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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29,143
DOC: Edit MultiIndex.set_levels() docstring to clarify that set_levels() interprets passed values as new components of the .levels attribute (#28294)
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12
2019-10-22T04:46:55Z
2020-01-03T13:13:18Z
2020-01-03T13:12:59Z
CONTRIBUTOR
null
Added documentation on MultiIndex.set_levels to clarify that MultiIndex.set_levels() interprets passed values as new components of the .levels attribute. Continuation of #28797 due to issues with Travis CI for Python 3.8 and subsequent git diff issues resulting from resolution of Travis CI issues. - [x] closes #28294 - or at least attempts to - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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510,492,547
MDExOlB1bGxSZXF1ZXN0MzMwODU3MjY2
29,144
BUG/TST: ensure groupby.agg preserves extension dtype
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8
2019-10-22T08:03:53Z
2019-10-25T14:08:22Z
2019-10-23T15:50:59Z
MEMBER
null
Closes https://github.com/pandas-dev/pandas/issues/29141 @jbrockmendel this is adding the cases I found in https://github.com/pandas-dev/pandas/issues/29141. It does a small revert of catching an error to get them passing, but then your PR can fix it properly?
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29,145
set_axis with callable
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7
2019-10-22T08:58:49Z
2021-07-22T05:09:39Z
null
NONE
null
Hi, I've been using method chaining to write most of my data wrangling processes and one of the things that bother me a bit is to modify column names as part of the chain. With a static list of column names, ```df.set_axis``` can do the work. But in the following cases, I have to use `df.columns=xxx` to modify the names. 1. Header comes from a row 2. Combine multi-indexed header into a single-index (e.g. concatenate levels) 3. Expand single-indexed header to multi-indexed (e.g. split via some delimiter) I wonder if these could be achieved by allowing ```df.set_axis``` to take callables, something similar to ```df.assign```.
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29,146
df.interpolate(method='pad') axis is not consistent with df.fillna(method='pad')
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2
2019-10-22T09:30:38Z
2020-06-02T22:42:51Z
2020-06-02T22:42:51Z
NONE
null
```df.interpolate(method='pad')``` behaves weirdly regarding the axis. ```python df = pd.DataFrame([[1,np.nan,3],[np.nan, 2,np.nan],[2,3,np.nan]]) 0 1 2 0 1.0 NaN 3.0 1 NaN 2.0 NaN 2 2.0 3.0 NaN df.fillna(method='pad', axis=0) 0 1 2 0 1.0 NaN 3.0 1 1.0 2.0 3.0 2 2.0 3.0 3.0 df.interpolate(method='pad', axis=0) 0 1 2 0 1.0 1.0 3.0 1 NaN 2.0 2.0 2 2.0 3.0 3.0 df.interpolate(method='linear', axis=0) 0 1 2 0 1.0 NaN 3.0 1 1.5 2.0 3.0 2 2.0 3.0 3.0 ``` Besides, ```df.interpolate(method='pad')``` does not seem to respond to `limit_area` ```python df.interpolate(method='pad',limit_area='inside',axis=1) 0 1 2 0 1.0 NaN 3.0 1 1.0 2.0 3.0 2 2.0 3.0 3.0 df.interpolate(method='linear',limit_area='inside', axis=0) 0 1 2 0 1.0 NaN 3.0 1 1.5 2.0 NaN 2 2.0 3.0 NaN ``` #### Output of ``pd.show_versions()`` <details> pandas : 0.25.2 numpy : 1.16.5 pytz : 2019.3 dateutil : 2.8.0 pip : 19.3.1 setuptools : 41.4.0 Cython : None pytest : 5.0.1 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : 4.4.1 html5lib : None pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : 7.8.0 pandas_datareader: 0.8.0 bs4 : None bottleneck : None fastparquet : 0.3.0 gcsfs : 0.3.1 lxml.etree : 4.4.1 matplotlib : 3.1.1 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : 0.13.0 pytables : None s3fs : 0.3.5 scipy : 1.3.1 sqlalchemy : None tables : None xarray : 0.14.0 xlrd : None xlwt : None xlsxwriter : None </details>
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510,606,000
MDExOlB1bGxSZXF1ZXN0MzMwOTUwNjgy
29,147
Remove TestData from series-tests test_replace.py
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1
2019-10-22T11:56:31Z
2019-10-22T12:38:39Z
2019-10-22T12:38:17Z
CONTRIBUTOR
null
Part of #22550 * Replaced TestData usage in `pandas/tests/series/test_replace.py` with fixtures - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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MDExOlB1bGxSZXF1ZXN0MzMwOTU0MDky
29,148
Remove TestData from series-tests test_repr.py
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3
2019-10-22T12:04:10Z
2019-10-23T14:23:12Z
2019-10-23T14:23:10Z
CONTRIBUTOR
null
Part of #22550 * Replaced TestData usage in `pandas/tests/series/test_repr.py` with fixtures - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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29,149
Remove TestData from series-tests test_sorting.py
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1
2019-10-22T12:07:51Z
2019-10-22T13:12:37Z
2019-10-22T13:12:32Z
CONTRIBUTOR
null
Part of #22550 * Replaced TestData usage in `pandas/tests/series/test_sorting.py` with fixtures - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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29,150
Remove TestData from series-tests test_timeseries.py
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1
2019-10-22T12:12:11Z
2019-10-22T14:59:57Z
2019-10-22T14:59:51Z
CONTRIBUTOR
null
Part of #22550 * Replaced TestData usage in `pandas/tests/series/test_timeseries.py` with fixtures - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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510,613,924
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29,151
DOC: contributors section for v0.24.0 shows too many contributors
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1
2019-10-22T12:12:17Z
2019-10-22T20:42:27Z
2019-10-22T20:42:26Z
CONTRIBUTOR
null
Found my name in https://pandas.pydata.org/pandas-docs/stable/whatsnew/v0.24.0.html#contributors. Did not contribute to that release. Contributed to 0.25.0 (that section is empty, though, see https://github.com/pandas-dev/pandas/issues/27687). In the `doc/source/whatsnew/v0.24.0.rst` the culprit seems to be `contributors:: v0.23.4..HEAD`, let's change `HEAD` to `v0.24.0`?
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510,617,565
MDExOlB1bGxSZXF1ZXN0MzMwOTYwMzMz
29,152
DOC: attempt to fix contributors for 0.24.0, 0.25.0/1/2
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4
2019-10-22T12:18:54Z
2019-10-22T19:43:00Z
2019-10-22T19:42:59Z
CONTRIBUTOR
null
This hopefully addresses https://github.com/pandas-dev/pandas/issues/29151, please review! CC @TomAugspurger @jreback
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Remove TestData from series-tests test_api.py
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1
2019-10-22T12:19:29Z
2019-10-22T18:34:14Z
2019-10-22T18:34:05Z
CONTRIBUTOR
null
Part of #22550 * Replaced TestData usage in `pandas/tests/series/test_api.py` with fixtures - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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CLN: replace Dict with Mapping to annotate arguments
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3
2019-10-22T13:00:18Z
2019-10-23T09:30:41Z
2019-10-22T19:03:41Z
MEMBER
null
xref https://docs.python.org/3/library/typing.html#typing.Dict cc @WillAyd
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Update my fork
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2019-10-22T13:32:07Z
2019-10-22T13:32:26Z
2019-10-22T13:32:26Z
CONTRIBUTOR
null
- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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Working with n rows in a concatenated df
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2019-10-22T14:32:01Z
2019-10-22T14:55:52Z
2019-10-22T14:51:30Z
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#### Code Sample, a copy-pastable example if possible ```python # Your code here So I have 3 different df. 2 of those df are per minute sensor readings and 3rd df is per hour readings. I'm concatenating the 2 dfs in to a new df of per minute readings and I want to work on this new df (per minute values), do regression, get slope for every hour and then concatenate this new df2 with per hour slope readings with the 3rd df with per hour readings. Any idea how I do that? I hope I've explained the problem well. ``` #### Problem description [this should explain **why** the current behaviour is a problem and why the expected output is a better solution.] **Note**: We receive a lot of issues on our GitHub tracker, so it is very possible that your issue has been posted before. Please check first before submitting so that we do not have to handle and close duplicates! **Note**: Many problems can be resolved by simply upgrading `pandas` to the latest version. Before submitting, please check if that solution works for you. If possible, you may want to check if `master` addresses this issue, but that is not necessary. For documentation-related issues, you can check the latest versions of the docs on `master` here: https://pandas-docs.github.io/pandas-docs-travis/ If the issue has not been resolved there, go ahead and file it in the issue tracker. #### Expected Output #### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] </details>
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Working with n rows in a df
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2019-10-22T14:37:30Z
2019-10-22T14:51:59Z
2019-10-22T14:51:59Z
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#### Code Sample, a copy-pastable example if possible ```python # Your code here ``` #### Problem description [this should explain **why** the current behaviour is a problem and why the expected output is a better solution.] **Note**: We receive a lot of issues on our GitHub tracker, so it is very possible that your issue has been posted before. Please check first before submitting so that we do not have to handle and close duplicates! **Note**: Many problems can be resolved by simply upgrading `pandas` to the latest version. Before submitting, please check if that solution works for you. If possible, you may want to check if `master` addresses this issue, but that is not necessary. For documentation-related issues, you can check the latest versions of the docs on `master` here: https://pandas-docs.github.io/pandas-docs-travis/ If the issue has not been resolved there, go ahead and file it in the issue tracker. #### Expected Output #### Output of ``pd.show_versions()`` <details> So I have 3 different df. 2 of those df are per minute sensor readings and 3rd df is per hour readings. I'm concatenating the 2 dfs in to a new df of per minute readings and I want to work on this new df (per minute values), do regression, get slope for every hour and then concatenate this new df2 with per hour slope readings with the 3rd df with per hour readings. Any idea how I do that? I hope I've explained the problem well. So basically I want to work with 60 rows. I'm new to pandas and this is my first issue on github. Please help and be gentle please. :)
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5
2019-10-22T14:55:02Z
2020-01-06T16:47:24Z
2019-10-23T16:07:23Z
CONTRIBUTOR
null
- [ ] closes #29073 - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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29,160
BUG: AttributeError raised by map inside groupby reduction
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5
2019-10-22T15:07:14Z
2019-11-21T20:00:08Z
2019-10-25T14:28:37Z
MEMBER
null
Gets the last AttributeError following #29100.
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29,161
loffset in pd.Grouper does not apply
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2
2019-10-22T15:12:05Z
2019-10-22T16:49:31Z
2019-10-22T16:49:26Z
NONE
null
#### Code Sample ```python date_index = pd.date_range("2019-08-26", "2019-09-20") sessions = DataFrame(range(1, len(dates) + 1), index=date_index, columns=['foo']) sessions.groupby(pd.Grouper(freq=pd.Timedelta(weeks=4), key='created_at', loffset='4W')).size() ``` #### Problem description The above use of `loffset` does not change the grouping labels as expected. The corresponding code using `DataFrame.resample` does work. Try: ```python sessions.resample(pd.Timedelta(weeks=4), on='created_at', loffset='4W') ``` #### Expected Output ``` created_at 2019-09-22 1048 2019-10-20 904 Freq: 28D, dtype: int64 ``` #### Actual Output ``` created_at 2019-08-26 1048 2019-09-23 904 Freq: 28D, dtype: int64 ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.6.4.final.0 python-bits : 64 OS : Darwin OS-release : 18.6.0 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : en_GB.UTF-8 LOCALE : en_GB.UTF-8 pandas : 0.25.2 numpy : 1.16.2 pytz : 2018.9 dateutil : 2.8.0 pip : 9.0.1 setuptools : 28.8.0 Cython : None pytest : 4.6.5 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : 1.1.1 lxml.etree : 4.3.2 html5lib : None pymysql : 0.9.3 psycopg2 : None jinja2 : 2.10 IPython : 7.5.0 pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : 4.3.2 matplotlib : 3.0.0 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None s3fs : None scipy : 1.2.1 sqlalchemy : 1.2.12 tables : None xarray : None xlrd : 1.2.0 xlwt : None xlsxwriter : 1.1.1 </details>
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29,162
.map on category dtype does not respect defaultdict when encountering np.nan values
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5
2019-10-22T16:03:32Z
2020-04-23T14:32:52Z
2020-04-23T14:32:42Z
NONE
null
Using .map() to x-walk values from a series, and ensure that only expected values are present. This scenario works to convert np.nan values to empty strings on object dtypes, but does not replace np.nan on category dtype. ```python import collections import pandas as pd import numpy as np # "01" maps to "12", and is a valid value, while everything else should be set to "" defdic = collections.defaultdict(lambda: "", {"01": "12"}) df = pd.DataFrame({"A": ["01", "z7", "", np.nan]}) df["A"].map(defdic) 0 12 1 2 3 Name: A, dtype: object df["A"].astype('category').map(defdic) 0 12 1 2 3 NaN Name: A, dtype: object ``` I would have expected the output to be the same for both object/category dtypes. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.6.3.final.0 python-bits : 64 OS : Linux OS-release : 3.10.0-1062.4.1.el7.x86_64 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 0.25.1 numpy : 1.17.2 pytz : 2019.3 dateutil : 2.8.0 pip : 9.0.1 setuptools : 41.4.0 Cython : 0.29.13 pytest : 5.2.1 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : 7.8.0 pandas_datareader: None bs4 : None bottleneck : None fastparquet : 0.3.2 gcsfs : None lxml.etree : None matplotlib : 3.1.1 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None s3fs : None scipy : 1.3.1 sqlalchemy : 1.3.10 tables : None xarray : None xlrd : None xlwt : None xlsxwriter : None </details>
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Update setup.py
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2019-10-22T17:49:43Z
2019-10-22T18:23:02Z
2019-10-22T18:23:02Z
NONE
null
jinja2 in the install_requires list
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29,164
TYPING : Series.name -> Optional[Hashable]
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3
2019-10-22T17:58:33Z
2019-10-23T09:28:09Z
2019-10-22T21:27:29Z
MEMBER
null
xref https://github.com/pandas-dev/pandas/pull/29062#discussion_r337644656 cc @WillAyd @TomAugspurger
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510,815,996
MDU6SXNzdWU1MTA4MTU5OTY=
29,165
ASV Benchmark - Time Standards
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6
2019-10-22T17:58:43Z
2019-10-28T15:12:54Z
null
MEMBER
null
TLDR - I think we need to cap our benchmarks at a maximum of .2 seconds. That's a long way off though, so I think should start with a cap of 1 second per benchmark Right now we have some very long running benchmarks: https://pandas.pydata.org/speed/pandas/#summarylist?sort=1&dir=desc I haven't seen a definitive answer, but I think ASV leverages the builtin timeit functionality to figure out how long a given benchmark should run. https://docs.python.org/3.7/library/timeit.html#command-line-interface Quoting what I thinks is important: > If -n is not given, a suitable number of loops is calculated by trying successive powers of 10 until the total time is at least 0.2 seconds. So IIUC a particular statement is executed n times (where n is a power of 10) to the point where it reaches 0.2 seconds to run, and then is repeated `repeat` times to get a reading. asv continuous would do this 4 times (2 runs for each commit being compared). In Python 3.6 `repeat` is 3 (we currently pin ASVs to 3.6) but in future versions that gets bumped to 5. We have a handful of benchmarks that are 20s a piece to run, so if we stick to the 3.6 timing these statements would run n=1 times repeated 3 times per benchmark session * 4 sessions per continuous run. 20s * 3 repeats * 4 sessions = 4 minutes for one benchmark alone rolling.Apply.time_rolling is a serious offender here so I think can start with that. Would take community PRs to improve performance of any of these, though maybe should prioritize anything currently taking over 1 second cc @qwhelan and @pv who may have additional insights
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510,824,140
MDExOlB1bGxSZXF1ZXN0MzMxMTMwNDgx
29,166
REF: avoid getattr pattern in libgroupby rank functions
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3
2019-10-22T18:15:01Z
2019-10-22T20:21:55Z
2019-10-22T20:18:22Z
MEMBER
null
cc @WillAyd do we need to do anything special w/r/t the comment on L1220 re #19560?
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510,854,201
MDExOlB1bGxSZXF1ZXN0MzMxMTU1MTcw
29,167
Remove unnecessary check for Python >= 3.5
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1
2019-10-22T19:15:41Z
2019-10-22T20:17:41Z
2019-10-22T20:17:30Z
MEMBER
null
Title is self-explanatory
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510,855,762
MDExOlB1bGxSZXF1ZXN0MzMxMTU2NDY1
29,168
Clarify referred command for flake8 caveat
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1
2019-10-22T19:19:03Z
2019-10-22T23:48:42Z
2019-10-22T23:11:58Z
MEMBER
null
Follow-up to: https://github.com/pandas-dev/pandas/pull/27233 With all of the content in-between about pre-commit hooks, the phrase `"This command"` does not make sense any more in the documentation about this `flake8` caveat.
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510,863,528
MDExOlB1bGxSZXF1ZXN0MzMxMTYyNzc3
29,169
CLN: remove simplejson
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3
2019-10-22T19:35:39Z
2019-10-26T09:41:07Z
2019-10-26T09:40:44Z
MEMBER
null
xref https://github.com/pandas-dev/pandas/pull/29022#discussion_r335652936
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510,886,088
MDExOlB1bGxSZXF1ZXN0MzMxMTgxMTIx
29,170
CI: Avoid passing attrs=None
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3
2019-10-22T20:21:48Z
2019-10-23T00:32:15Z
2019-10-23T00:32:12Z
MEMBER
null
Trying to fix the allowed-failure build on Travis; I haven't been able to reproduce that error locally, so this is a shot in the dark.
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510,890,671
MDExOlB1bGxSZXF1ZXN0MzMxMTg0ODUy
29,171
TST: Document and test na_filter in read_excel
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1
2019-10-22T20:29:37Z
2019-10-23T20:15:57Z
2019-10-23T20:08:09Z
MEMBER
null
Closes https://github.com/pandas-dev/pandas/issues/25453 Picks up where https://github.com/pandas-dev/pandas/pull/26353 left off
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510,894,508
MDExOlB1bGxSZXF1ZXN0MzMxMTg4MTg1
29,172
Remove TestData in frame tests in multiple files
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2
2019-10-22T20:35:57Z
2019-10-25T12:50:06Z
2019-10-25T12:50:03Z
CONTRIBUTOR
null
Part of #22471 This is removing/replacing TestData usage in the following files: * `test_convert_to.py` * `test_nonunique_indexes.py` * `test_query_eval.py` * `test_replace.py` * `test_repr_info.py` -------- - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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MDExOlB1bGxSZXF1ZXN0MzMxMjUyNzgx
29,173
Fixed segfaults and incorrect results in GroupBy.quantile with NA Values in Grouping
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5
2019-10-22T22:39:06Z
2019-10-30T18:34:47Z
2019-10-30T18:29:09Z
MEMBER
null
- [X] closes #28882 - [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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510,993,308
MDExOlB1bGxSZXF1ZXN0MzMxMjc0MTU4
29,174
Removed raise_from_traceback
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6
2019-10-22T23:59:37Z
2019-10-29T07:00:52Z
2019-10-26T08:29:00Z
MEMBER
null
ref #29170 This is a pretty old compat function that I think actually hides the errors we are looking for when run via load scheduling. I've converted to a mixture of `raise...from` and `raise (e).with_traceback()` depending on what was available. Not sure it matters too much either way Let's see...
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MDExOlB1bGxSZXF1ZXN0MzMxMjgxMjI0
29,175
CLN: Assorted cleanups
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2019-10-23T00:30:26Z
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29,176
404 Error: PDF Documentation Download
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2019-10-23T03:26:47Z
2019-10-23T12:14:40Z
2019-10-23T12:14:40Z
NONE
null
The PDF documentation download link is yielding a 404 error. https://pandas.pydata.org/pandas-docs/stable/pandas.pdf Thank you in advance for fixing it.
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29,177
CLN: don't catch TypeError in _aggregate_item_by_item
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2019-10-23T03:52:01Z
2019-10-23T14:38:13Z
2019-10-23T11:46:42Z
MEMBER
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Made possible by #29103
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CLN: Add types in a handful of places
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Fix mypy errors in testcommon py
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15
2019-10-23T05:12:29Z
2019-11-07T16:23:23Z
2019-11-07T16:23:11Z
CONTRIBUTOR
null
- [x] xref [#28926](https://github.com/pandas-dev/pandas/issues/28926) - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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TST: Test Series integer mod behavior on string
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4
2019-10-23T09:31:08Z
2019-10-23T18:40:49Z
2019-10-23T17:26:16Z
MEMBER
null
Closes https://github.com/pandas-dev/pandas/issues/24396
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ImportError: Can't determine version for bottleneck
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4
2019-10-23T12:08:32Z
2020-07-08T06:10:58Z
2019-10-23T12:22:17Z
NONE
null
``` conda create -n PANDAS pandas activate PANDAS python ``` ```python import pandas ``` Gives me ```python ImportError: Can't determine version for bottleneck ``` #### Output of conda list <details> # Name Version Build Channel blas 1.0 mkl ca-certificates 2019.10.16 0 certifi 2019.9.11 py37_0 icc_rt 2019.0.0 h0cc432a_1 intel-openmp 2019.4 245 mkl 2019.4 245 mkl-service 2.3.0 py37hb782905_0 mkl_fft 1.0.14 py37h14836fe_0 mkl_random 1.1.0 py37h675688f_0 numpy 1.16.5 py37h19fb1c0_0 numpy-base 1.16.5 py37hc3f5095_0 openssl 1.1.1d he774522_3 pandas 0.25.2 py37ha925a31_0 pip 19.3.1 py37_0 python 3.7.4 h5263a28_0 python-dateutil 2.8.0 py37_0 pytz 2019.3 py_0 setuptools 41.4.0 py37_0 six 1.12.0 py37_0 sqlite 3.30.0 he774522_0 vc 14.1 h0510ff6_4 vs2015_runtime 14.16.27012 hf0eaf9b_0 wheel 0.33.6 py37_0 wincertstore 0.2 py37_0 </details>
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29,182
ENH: Add StringArray.__arrow_array__ for conversion to Arrow
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2
2019-10-23T13:51:10Z
2019-10-25T13:42:12Z
2019-10-25T13:34:10Z
MEMBER
null
Similar as https://github.com/pandas-dev/pandas/pull/28368 (which did this for IntegerArray)
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29,183
UTF8 string dtype
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3
2019-10-23T14:08:18Z
2019-10-23T14:53:55Z
2019-10-23T14:53:55Z
CONTRIBUTOR
null
As far as I understand, for strings pandas uses an `object` dtype with Unicode representation where each character takes 4 bytes, similarly to numpy `U` dtype, ```py >>> import numpy as np >>> x = np.array(["ac", "bd"]) >>> x.nbytes / (len(x) * 2) # bytes per char 4.0 >>> df = pd.DataFrame({'a': x}) >>> df.dtypes a object dtype: object >>> df['a'].values.nbytes / (len(x) * 2) # bytes per char 4.0 ``` Wouldn't it be possible to support UTF-8 encoded strings? That would decrease by 2-4 the memory requirements, for a number of languages. For instance parquet and arrow seem to be doing that [[1](https://github.com/apache/parquet-format/blob/master/LogicalTypes.md#string)], [[2](https://arrow.apache.org/docs/cpp/api/datatype.html#_CPPv4N5arrow4Type6STRINGE)]. Since each cell is a variable length string represented as an object, using UTF8 might be possible unlike for fixed length numpy strings (https://github.com/pandas-dev/pandas/issues/5261)? (Not sure if there were other discussions about this previously; "utf8", "string", and "dtype" are pretty noisy search key words).
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29,184
DOC: Update the LaTeX author.
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1
2019-10-23T14:55:14Z
2019-10-23T19:36:23Z
2019-10-23T19:36:23Z
CONTRIBUTOR
null
The LaTeX engine did not like the newlines. It caused an undefined control sequence.
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Debug 38 build
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2019-10-23T15:44:56Z
2020-01-16T00:33:42Z
2019-10-23T21:18:05Z
MEMBER
null
Seeing if this helps with 38 build hanging until something more permanent comes along @TomAugspurger @jorisvandenbossche
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29,186
CLN: preempt TypeError for EAs in groupby agg_series
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1
2019-10-23T16:04:42Z
2019-10-25T13:57:13Z
2019-10-24T12:03:19Z
MEMBER
null
xref #29144
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511,433,622
MDU6SXNzdWU1MTE0MzM2MjI=
29,187
Deprecate / Remove pandas.util.testing.assert_raises_regex
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1
2019-10-23T16:18:04Z
2019-10-23T16:21:25Z
2019-10-23T16:21:24Z
MEMBER
null
As noted by @simonjayhawkins in https://github.com/pandas-dev/pandas/pull/29174#discussion_r337961652 we have some `assert_raises_regex` code laying around in pandas.util.testing that isn't used internally. Can rip out a chunk of code if we get rid of that. I think we need to deprecate as pandas.util.testing is part of the leaky API, though removal is an option as well.
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511,465,521
MDExOlB1bGxSZXF1ZXN0MzMxNjU3ODg1
29,188
Fix mypy error in pandas/tests.indexes.test_base.py
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18
2019-10-23T17:23:02Z
2019-11-27T16:09:19Z
2019-11-27T16:09:11Z
CONTRIBUTOR
null
- [x] relates to #28926 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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511,474,715
MDU6SXNzdWU1MTE0NzQ3MTU=
29,189
groupby error when grouping by float index with non-unique values
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5
2019-10-23T17:41:54Z
2019-11-25T23:45:27Z
2019-11-25T23:45:27Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python pd.Series([2, 5, 6, 8], [2.0, 4.0, 4.0, 5.0]).groupby(level=0) ``` #### Problem description This should just work instead of raising. #### Expected Output #### Output of ``pd.show_versions()`` <details> pandas : 0.26.0.dev0+593.g9d45934af numpy : 1.17.0 </details>
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29,190
BUG: Preserve key order when using loc on MultiIndex DataFrame
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7
2019-10-23T18:31:44Z
2020-03-16T19:31:41Z
2020-01-18T19:38:02Z
CONTRIBUTOR
null
This is another implementation to solve the issue described in #22797. The other PR is #28933. When the other PR keep the main code identical and resort the indexer at the end, this implementation try to resolve the problem in the main loop of the original code. The solution also as consequences on the performance when the key order is sorted as the index, so it add a flag to only keep the order if needed. ## Benchmark <details> Benchmarks that have improved: before after ratio [e623f0fb] [b5b7be06] <stash~5> <multiindex_loc_order_issue_22797> - 2.50±0.01ms 2.35±0ms 0.94 ctors.SeriesConstructors.time_series_constructor(<class 'list'>, False, 'int') - 2.55±0.01ms 2.40±0ms 0.94 ctors.SeriesConstructors.time_series_constructor(<class 'list'>, True, 'int') - 767±0.5ms 707±2ms 0.92 groupby.Transform.time_transform_lambda_max - 2.74±0.2μs 2.49±0.2μs 0.91 index_cached_properties.IndexCache.time_inferred_type('Float64Index') - 2.64±0.1μs 2.51±0.2μs 0.95 index_cached_properties.IndexCache.time_is_all_dates('Float64Index') - 517±10μs 491±10μs 0.95 index_cached_properties.IndexCache.time_is_monotonic('MultiIndex') - 671±6μs 605±6μs 0.90 index_cached_properties.IndexCache.time_is_monotonic_decreasing('MultiIndex') - 514±10μs 489±10μs 0.95 index_cached_properties.IndexCache.time_is_monotonic_increasing('MultiIndex') - 6.61±0.3μs 5.68±1μs 0.86 index_cached_properties.IndexCache.time_shape('TimedeltaIndex') - 3.87±0.7μs 2.84±0.2μs 0.73 index_cached_properties.IndexCache.time_values('TimedeltaIndex') - 2.87±0.03μs 2.72±0.01μs 0.95 indexing.GetItemSingleColumn.time_frame_getitem_single_column_label - 1.19±0.02ms 787±20μs 0.66 indexing.MultiIndexing.time_frame_ix - 1.11±0.02ms 722±20μs 0.65 indexing.MultiIndexing.time_series_ix - 3.54±0.01ms 3.37±0.01ms 0.95 indexing.NonNumericSeriesIndexing.time_getitem_list_like('string', 'unique_monotonic_inc') - 644±2μs 568±1μs 0.88 multiindex_object.Duplicates.time_remove_unused_levels - 746±8μs 189±2μs 0.25 multiindex_object.GetLoc.time_large_get_loc - 169±0.6ms 102±0.4ms 0.61 multiindex_object.GetLoc.time_large_get_loc_warm - 94.2±0.2μs 23.8±0.3μs 0.25 multiindex_object.GetLoc.time_med_get_loc - 90.1±0.3ms 23.1±0.3ms 0.26 multiindex_object.GetLoc.time_med_get_loc_warm - 87.1±0.2ms 22.8±0.2ms 0.26 multiindex_object.GetLoc.time_small_get_loc_warm - 88.9±0.2μs 23.1±0.2μs 0.26 multiindex_object.GetLoc.time_string_get_loc - 700±0.8μs 550±0.6μs 0.79 multiindex_object.Values.time_datetime_level_values_sliced - 1.65±0.03ms 1.21±0.02ms 0.73 reindex.LevelAlign.time_align_level - 1.65±0.04ms 1.22±0.01ms 0.74 reindex.LevelAlign.time_reindex_level - 91.7±0.1ms 86.8±0.1ms 0.95 reshape.Crosstab.time_crosstab_normalize_margins - 25.5±0.4ms 24.0±0.4ms 0.94 reshape.PivotTable.time_pivot_table - 51.6±0.6ms 48.0±0.2ms 0.93 reshape.PivotTable.time_pivot_table_agg - 19.7±0.05ms 18.4±0.2ms 0.93 reshape.PivotTable.time_pivot_table_categorical - 14.2±0.03ms 13.1±0.04ms 0.92 reshape.PivotTable.time_pivot_table_categorical_observed - 107±0.8ms 94.0±0.9ms 0.88 reshape.PivotTable.time_pivot_table_margins - 6.02±0.02ms 5.47±0.02ms 0.91 reshape.SimpleReshape.time_stack - 2.46±0.02ms 2.20±0.02ms 0.89 reshape.SimpleReshape.time_unstack - 2.30±0ms 1.73±0.01ms 0.75 reshape.SparseIndex.time_unstack - 18.9±0.1ms 18.0±0.03ms 0.95 rolling.Pairwise.time_pairwise(10, 'cov', True) - 2.60±0ms 2.33±0ms 0.90 sparse.FromCoo.time_sparse_series_from_coo - 41.3±0.2ms 39.2±0.2ms 0.95 sparse.ToCoo.time_sparse_series_to_coo - 3.98±0s 3.75±0.01s 0.94 stat_ops.Correlation.time_corr_wide_nans('spearman', False) - 3.99±0.01s 3.74±0.01s 0.94 stat_ops.Correlation.time_corr_wide_nans('spearman', True) - 40.9±0.07ms 36.8±0.1ms 0.90 stat_ops.FrameMultiIndexOps.time_op(0, 'kurt') - 195±0.3ms 165±0.3ms 0.85 stat_ops.FrameMultiIndexOps.time_op(1, 'kurt') - 87.7±1ms 78.1±1ms 0.89 stat_ops.FrameMultiIndexOps.time_op(1, 'skew') - 710±1ms 628±3ms 0.88 stat_ops.FrameMultiIndexOps.time_op([0, 1], 'skew') - 10.7±0.1ms 9.66±0.3ms 0.90 stat_ops.SeriesMultiIndexOps.time_op(0, 'kurt') - 10.6±0.05ms 9.15±0.2ms 0.86 stat_ops.SeriesMultiIndexOps.time_op(0, 'skew') - 4.55±0.1ms 4.01±0.08ms 0.88 stat_ops.SeriesMultiIndexOps.time_op(0, 'std') - 4.15±0.06ms 3.86±0.1ms 0.93 stat_ops.SeriesMultiIndexOps.time_op(0, 'var') - 49.4±0.4ms 43.3±0.2ms 0.88 stat_ops.SeriesMultiIndexOps.time_op(1, 'kurt') - 128±0.3ms 112±0.3ms 0.88 stat_ops.SeriesMultiIndexOps.time_op(1, 'mad') - 48.0±0.3ms 40.3±0.4ms 0.84 stat_ops.SeriesMultiIndexOps.time_op(1, 'skew') - 4.55±0.08ms 3.97±0.1ms 0.87 stat_ops.SeriesMultiIndexOps.time_op(1, 'std') - 4.14±0.1ms 3.81±0.09ms 0.92 stat_ops.SeriesMultiIndexOps.time_op(1, 'var') - 434±0.5ms 357±0.4ms 0.82 stat_ops.SeriesMultiIndexOps.time_op([0, 1], 'kurt') - 1.20±0s 1.04±0s 0.86 stat_ops.SeriesMultiIndexOps.time_op([0, 1], 'mad') - 422±0.7ms 339±1ms 0.80 stat_ops.SeriesMultiIndexOps.time_op([0, 1], 'skew') - 48.6±0.2ms 40.5±0.07ms 0.83 timeseries.DatetimeIndex.time_to_pydatetime('repeated') - 288±0.9ms 271±0.8ms 0.94 timeseries.DatetimeIndex.time_to_pydatetime('tz_aware') - 48.3±0.1ms 40.6±0.1ms 0.84 timeseries.DatetimeIndex.time_to_pydatetime('tz_naive') Benchmarks that have got worse: before after ratio [e623f0fb] [b5b7be06] <stash~5> <multiindex_loc_order_issue_22797> + 149±0.5ms 170±0.6ms 1.15 categoricals.Rank.time_rank_string + 7.23±0.2ms 8.38±0.3ms 1.16 categoricals.Rank.time_rank_string_cat + 9.81±0.1ms 10.4±0.1ms 1.06 categoricals.Rank.time_rank_string_cat_ordered + 2.45±0.01ms 2.65±0.09ms 1.08 frame_methods.Iteration.time_items_cached + 227±0.3ms 239±4ms 1.06 groupby.GroupByMethods.time_dtype_as_field('datetime', 'unique', 'transformation') + 148±0.3ms 157±0.3ms 1.06 groupby.GroupByMethods.time_dtype_as_field('float', 'unique', 'direct') + 148±0.5ms 157±0.8ms 1.06 groupby.GroupByMethods.time_dtype_as_field('float', 'unique', 'transformation') + 144±0.5ms 153±3ms 1.06 groupby.GroupByMethods.time_dtype_as_field('int', 'unique', 'direct') + 143±0.4ms 155±5ms 1.08 groupby.GroupByMethods.time_dtype_as_field('int', 'unique', 'transformation') + 489±3μs 541±4μs 1.11 groupby.GroupByMethods.time_dtype_as_field('object', 'first', 'direct') + 488±2μs 546±3μs 1.12 groupby.GroupByMethods.time_dtype_as_field('object', 'first', 'transformation') + 481±2μs 547±20μs 1.14 groupby.GroupByMethods.time_dtype_as_field('object', 'last', 'direct') + 480±2μs 536±6μs 1.12 groupby.GroupByMethods.time_dtype_as_field('object', 'last', 'transformation') + 173±0.2ms 183±0.5ms 1.06 groupby.GroupByMethods.time_dtype_as_field('object', 'unique', 'direct') + 173±0.5ms 183±0.4ms 1.06 groupby.GroupByMethods.time_dtype_as_field('object', 'unique', 'transformation') + 334±0.3ms 358±3ms 1.07 groupby.GroupByMethods.time_dtype_as_group('datetime', 'unique', 'direct') + 334±0.3ms 356±2ms 1.07 groupby.GroupByMethods.time_dtype_as_group('datetime', 'unique', 'transformation') + 330±0.4ms 352±2ms 1.07 groupby.GroupByMethods.time_dtype_as_group('float', 'unique', 'direct') + 331±0.7ms 353±0.6ms 1.07 groupby.GroupByMethods.time_dtype_as_group('float', 'unique', 'transformation') + 212±0.3ms 224±0.8ms 1.06 groupby.GroupByMethods.time_dtype_as_group('int', 'unique', 'direct') + 211±0.2ms 224±0.7ms 1.06 groupby.GroupByMethods.time_dtype_as_group('int', 'unique', 'transformation') + 766±3μs 1.67±0ms 2.19 groupby.GroupByMethods.time_dtype_as_group('object', 'unique', 'direct') + 766±0.7μs 1.68±0ms 2.19 groupby.GroupByMethods.time_dtype_as_group('object', 'unique', 'transformation') + 4.96±0.05μs 5.42±0.1μs 1.09 index_cached_properties.IndexCache.time_engine('DatetimeIndex') + 4.25±0.05μs 4.46±0.05μs 1.05 index_cached_properties.IndexCache.time_engine('PeriodIndex') + 2.92±0.1μs 3.13±0.2μs 1.07 index_cached_properties.IndexCache.time_inferred_type('MultiIndex') + 988±30ns 1.07±0.05μs 1.08 index_cached_properties.IndexCache.time_inferred_type('RangeIndex') + 2.38±0.1μs 2.74±0.5μs 1.15 index_cached_properties.IndexCache.time_inferred_type('TimedeltaIndex') + 2.70±0.2μs 3.05±0.5μs 1.13 index_cached_properties.IndexCache.time_is_all_dates('UInt64Index') + 1.41±0.02μs 1.51±0.04μs 1.07 index_cached_properties.IndexCache.time_is_monotonic_increasing('Int64Index') + 941±20ns 1.01±0.02μs 1.07 index_cached_properties.IndexCache.time_is_unique('RangeIndex') + 3.70±0.1μs 3.93±0.1μs 1.06 index_cached_properties.IndexCache.time_shape('UInt64Index') + 2.88±0.2μs 3.05±0.2μs 1.06 index_cached_properties.IndexCache.time_values('UInt64Index') + 5.43±0.08μs 6.39±0.02μs 1.18 index_object.Indexing.time_get_loc('Int') + 5.44±0.06μs 6.45±0.2μs 1.19 index_object.Indexing.time_get_loc_sorted('Int') + 2.76±0.06ms 3.01±0ms 1.09 indexing.IntervalIndexing.time_getitem_scalar + 3.09±0.06ms 3.34±0.02ms 1.08 indexing.IntervalIndexing.time_loc_list + 2.78±0.05ms 3.03±0ms 1.09 indexing.IntervalIndexing.time_loc_scalar + 5.83±0.02ms 16.6±0.03ms 2.85 indexing.MultiIndexing.time_index_slice + 2.45±0.02ms 2.59±0.02ms 1.06 inference.NumericInferOps.time_divide(<class 'numpy.uint8'>) + 9.78±0.08ms 10.4±0.07ms 1.06 io.csv.ParseDateComparison.time_read_csv_dayfirst(False) + 789±2ms 849±4ms 1.08 io.json.ReadJSON.time_read_json('index', 'datetime') + 840±0.6ms 923±3ms 1.10 io.json.ReadJSON.time_read_json('index', 'int') + 49.2±0.05ms 52.1±0.3ms 1.06 io.parsers.DoesStringLookLikeDatetime.time_check_datetimes('0.0') + 68.1±0.4ms 72.3±0.5ms 1.06 io.parsers.DoesStringLookLikeDatetime.time_check_datetimes('2Q2005') + 1.64±0μs 1.86±0.1μs 1.14 period.PeriodProperties.time_property('M', 'daysinmonth') + 1.68±0.01μs 1.80±0.03μs 1.07 period.PeriodProperties.time_property('M', 'is_leap_year') + 1.68±0.02μs 1.77±0.02μs 1.05 period.PeriodProperties.time_property('min', 'is_leap_year') + 739±0.7ms 1.41±0s 1.91 stat_ops.FrameMultiIndexOps.time_op([0, 1], 'kurt') + 764±10ns 810±2ns 1.06 timestamp.TimestampProperties.time_freqstr(<DstTzInfo 'Europe/Amsterdam' LMT+0:20:00 STD>, None) + 763±10ns 812±0.9ns 1.07 timestamp.TimestampProperties.time_freqstr(<UTC>, None) + 763±10ns 812±1ns 1.06 timestamp.TimestampProperties.time_freqstr(None, None) + 762±10ns 811±2ns 1.06 timestamp.TimestampProperties.time_freqstr(tzutc(), None) </details> ## Checklist - [x] closes #22797 - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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511,519,315
MDExOlB1bGxSZXF1ZXN0MzMxNzAyMDM2
29,191
Asset Frame with duplicate index
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4
2019-10-23T19:15:05Z
2019-11-08T00:34:22Z
2019-11-08T00:34:22Z
CONTRIBUTOR
null
- [ ] closes #26494 - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Hey guys, I started working on a way to make testing.assert_frame_equal accept an argument so it can test equals a frame with duplicate index just like the issue I marked to close here. For this I had to make a couple of changes in some functions and I think I got to the point that I should ask for a better direction and if this is valid for the project. The error pointed in the issue is definitely not the best message for this case. I got to the point to not get that error by making clear there is a duplicate index. But I got stuck in this error now: `ValueError: Shape of passed values is (5, 1), indices imply (3, 1)`
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511,523,724
MDExOlB1bGxSZXF1ZXN0MzMxNzA1NTU0
29,192
Removed generate_bins_generic
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6
2019-10-23T19:24:21Z
2019-10-29T17:11:05Z
2019-10-29T17:10:50Z
MEMBER
null
appears to be dead groupby code
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511,542,682
MDExOlB1bGxSZXF1ZXN0MzMxNzIxMDU2
29,193
Test For MultiIndex not contained item
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2019-10-23T20:05:14Z
2020-01-01T18:34:42Z
2020-01-01T18:34:41Z
CONTRIBUTOR
null
- [x] closes #21094 - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry I just made the test that was requested in this issue but in fact it isn't actually passing like mentioned there. Maybe my master is not updated for this. Should tests be added to whatsnew entry too?
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511,562,728
MDExOlB1bGxSZXF1ZXN0MzMxNzM4MDA1
29,194
CLN: dont catch Exception in _aggregate_frame
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1
2019-10-23T20:46:56Z
2019-10-25T13:52:32Z
2019-10-24T12:06:27Z
MEMBER
null
cc @jreback @WillAyd
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511,581,220
MDExOlB1bGxSZXF1ZXN0MzMxNzUyNTkx
29,195
CLN: don't catch AttributeError in _wrap_applied_output
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1
2019-10-23T21:26:50Z
2019-10-25T17:36:14Z
2019-10-25T17:10:33Z
MEMBER
null
cc @jreback @WillAyd
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29,196
Added io Annotation
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1
2019-10-23T23:31:58Z
2020-01-16T00:33:42Z
2019-10-24T00:14:57Z
MEMBER
null
This is a quick follow up to https://github.com/pandas-dev/pandas/pull/26024/files#r317413254 The last remaining argument still has a slew of issues with it (provided below for reference) so leaving that for now ```sh pandas/io/common.py:439: error: Incompatible types in assignment (expression has type "GzipFile", variable has type "Union[str, Path, IO[Any]]") pandas/io/common.py:439: error: Argument "fileobj" to "GzipFile" has incompatible type "Union[str, Path, IO[Any]]"; expected "Optional[IO[bytes]]" pandas/io/common.py:478: error: Argument 1 to "append" of "list" has incompatible type "Union[str, Path, IO[Any]]"; expected "IO[Any]" pandas/io/common.py:483: error: Argument 1 to "open" has incompatible type "Union[str, Path, IO[Any]]"; expected "Union[str, bytes, int, _PathLike[Any]]" pandas/io/common.py:486: error: Argument 1 to "open" has incompatible type "Union[str, Path, IO[Any]]"; expected "Union[str, bytes, int, _PathLike[Any]]" pandas/io/common.py:489: error: Argument 1 to "open" has incompatible type "Union[str, Path, IO[Any]]"; expected "Union[str, bytes, int, _PathLike[Any]]" pandas/io/common.py:496: error: Argument 1 to "TextIOWrapper" has incompatible type "Union[str, Path, IO[Any]]"; expected "IO[bytes]" pandas/io/common.py:503: error: Argument 1 to "MMapWrapper" has incompatible type "Union[str, Path, IO[Any]]"; expected "IO[Any]" pandas/io/common.py:504: error: Item "str" of "Union[str, Path, IO[Any]]" has no attribute "close" pandas/io/common.py:504: error: Item "Path" of "Union[str, Path, IO[Any]]" has no attribute "close" pandas/io/common.py:505: error: Incompatible types in assignment (expression has type "MMapWrapper", variable has type "Union[str, Path, IO[Any]]") ```
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511,631,455
MDU6SXNzdWU1MTE2MzE0NTU=
29,197
MyPy Error Codes
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1
2019-10-24T00:02:05Z
2020-08-06T15:35:16Z
2020-08-06T15:12:34Z
MEMBER
null
mypy 0.73 came with support for error codes: http://mypy-lang.blogspot.com/2019/09/mypy-730-released.html I think we should add these to CI and update docs to require these going forward for any `type: ignore` statements @simonjayhawkins
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511,690,531
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29,198
CI Linux py36_locale_slow Hanging
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4
2019-10-24T03:52:56Z
2019-10-25T00:36:38Z
2019-10-25T00:36:38Z
MEMBER
null
Seems to be hanging on miniconda install script: https://dev.azure.com/pandas-dev/pandas/_build/results?buildId=19314&view=logs&jobId=5ddd427e-1f95-5998-4195-7ffbeb9b114d&taskId=2d75e2dd-4c84-5053-e835-c449aeb02662&lineStart=256&lineEnd=257&colStart=1&colEnd=1 Interestingly enough the Linux py36_locale_slow_old_np seems to be OK
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29,199
CLN: simplify core.algorithms
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3
2019-10-24T04:01:02Z
2019-10-31T14:52:05Z
2019-10-25T17:49:34Z
MEMBER
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511,807,479
MDExOlB1bGxSZXF1ZXN0MzMxOTM0OTQw
29,200
BUG: Changed the way duplicated() handles empty dataframe
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2019-10-24T09:02:35Z
2019-10-24T11:00:08Z
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- [ ] closes #12869 - [ ] tests passed
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511,874,926
MDExOlB1bGxSZXF1ZXN0MzMxOTkwNTc5
29,201
Fix missing argument name in format function call
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2019-10-24T11:11:12Z
2019-10-24T16:53:31Z
2019-10-24T16:53:30Z
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Adds the keyword argument `name` to a `str.format` function call that was missing it (yielding a breaking error).
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29,202
Change unused loop variable to _
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2019-10-24T11:20:51Z
2019-10-24T16:45:12Z
2019-10-24T16:45:12Z
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The `_version.py` file had an unused loop variable (`i`), this PR changes it `_`.
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511,923,432
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29,203
Improve docs on what the axis= kwarg does in individual functions/methods
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10
2019-10-24T12:50:52Z
2020-10-12T15:35:01Z
2020-10-12T15:35:01Z
NONE
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### `axis=0` or `axis=1`, which is it? I've always found it hard to remember which axis (`0/"index"` vs. `1/"columns"`) does what for various operations. I suppose some people find it intuitive, while others (like me) find it confusing and inconsistent. Case in point, `DataFrame.sum` vs. `DataFrame.drop`: if I want **column sums**, I need `axis=0`... ```python >>> import pandas as pd >>> df = pd.DataFrame(dict(a=[1, 2, 3], b=[4, 5, 6])) >>> df a b 0 1 4 1 2 5 2 3 6 >>> df.sum(axis=0) a 6 b 15 dtype: int64 ``` ... but if I want to **drop a column**, I need `axis=1`: ```python >>> df.drop("a", axis=1) b 0 4 1 5 2 6 ``` There's an analogous discrepancy in numpy (which is probably where pandas inherited it from?): ```python >>> import numpy as np >>> a = df.to_numpy() >>> a array([[1, 4], [2, 5], [3, 6]]) >>> np.sum(a, axis=0) # sum columns array([ 6, 15]) >>> np.delete(a, 0, axis=1) # delete first column array([[4], [5], [6]]) ``` I just intuitively conceptualize these operations as working along the same axis, so it's hard for me to internalize that the value of the axis parameter is different in each case. Apparently, [I'm not the only person to find this confusing](https://www.sharpsightlabs.com/blog/numpy-axes-explained/) (quoting from the article: "For example, in the np.sum() function, the axis parameter behaves in a way that many people think is counter intuitive"). At the same time, I can imagine that some people find this behavior completely natural (at the very least those who designed the API). And I understand that changing this in pandas while keeping the status quo in numpy would introduce a (probably) worse inconsistency, so I'm not suggesting that. ### Suggestion for improvement What I am suggesting is **reviewing the documentation of functions/methods using the `axis=` keyword argument** and (where applicable) **improving the description of what it controls in each case**. Pandas is typically used interactively, so documentation is easily accessible. If it contains useful hints on what each `axis` value does (and possibly why), it's not such a big problem if this behavior goes against some people's expectations. ### Examples For example, based on the [current master docs](https://pandas-docs.github.io/pandas-docs-travis/), the [description of the `axis` parameter for `drop`](https://pandas-docs.github.io/pandas-docs-travis/reference/api/pandas.DataFrame.drop.html#pandas.DataFrame.drop) does a good job at this: > axis : {0 or ‘index’, 1 or ‘columns’}, default 0 > Whether to drop labels from the index (0 or ‘index’) or columns (1 or ‘columns’). This makes it reasonably clear to me that if I specify `0`, I'll be removing rows, whereas `1` will result in removing columns. By contrast, the [description of the `axis` parameter for `sum`](https://pandas-docs.github.io/pandas-docs-travis/reference/api/pandas.DataFrame.sum.html#pandas.DataFrame.sum) is somewhat too generic: > axis : {index (0), columns (1)} > Axis for the function to be applied on. Based on this, I could conclude (and have repeatedly done so) that if I want column sums, I need to "apply the function on columns", hence `axis=1` (which is wrong, cf. above). A revised description could look something like the following: > axis : {index (0), columns (1)} > Whether to collapse the index (0 or ‘index’), resulting in column sums, or the columns (1 or ‘columns’), resulting in row sums.
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29,204
DOCS: docstrings formatting errors in pandas.PeriodIndex
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CONTRIBUTOR
null
[pandas/core/indexes/period.py](https://github.com/pandas-dev/pandas/blob/04893a954b91574279c402e8730a4b5fae2ae9e1/pandas/core/indexes/period.py) #28602 #27977 ``` ./scripts/validate_docstrings.py --errors=PR09 ``` ``` pandas.PeriodIndex: Parameter "data" description should finish with "." pandas.PeriodIndex: Parameter "copy" description should finish with "." pandas.PeriodIndex: Parameter "freq" description should finish with "." pandas.PeriodIndex: Parameter "periods" description should finish with "." pandas.PeriodIndex: Parameter "end" description should finish with "." pandas.PeriodIndex: Parameter "tz" description should finish with "." pandas.PeriodIndex.asfreq: Parameter "freq" description should finish with "." pandas.PeriodIndex.to_timestamp: Parameter "freq" description should finish with "." ``` ``` ./scripts/validate_docstrings.py pandas.PeriodIndex ``` ``` Summary should fit in a single line Parameters {**fields, name, ordinal} not documented Unknown parameters {month, quarter, second, day, year, minute, hour} Parameter "data" description should finish with "." Parameter "copy" description should finish with "." Parameter "freq" description should finish with "." Parameter "periods" description should finish with "." Parameter "end" description should finish with "." Parameter "year" has no description Parameter "month" has no description Parameter "quarter" has no description Parameter "day" has no description Parameter "hour" has no description Parameter "minute" has no description Parameter "second" has no description Parameter "tz" description should finish with "." Parameter "dtype" has no description Examples do not pass tests flake8 error: F821 undefined name 'year_arr' (2 times) ``` and a failed example on line 89 ``` ./scripts/validate_docstrings.py pandas.PeriodIndex.asfreq ``` ``` Parameters {*args, **kwargs} not documented Unknown parameters {freq, how} Parameter "freq" description should start with a capital letter Parameter "freq" description should finish with "." Parameter "how" description should start with a capital letter The first line of the Returns section should contain only the type, unless multiple values are being returned Return value has no description ``` ``` ./scripts/validate_docstrings.py pandas.PeriodIndex.to_timestamp ``` ``` Parameters {**kwargs, *args} not documented Unknown parameters {freq, how} Parameter "freq" description should finish with "." Parameter "how" has no description Return value has no description ```
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511,965,490
MDExOlB1bGxSZXF1ZXN0MzMyMDY1NTY5
29,205
TYPING: Added types for some tests
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16
2019-10-24T14:00:37Z
2019-11-03T14:28:34Z
2019-11-03T14:28:33Z
CONTRIBUTOR
null
Working around a strange typing issue. See https://github.com/pandas-dev/pandas/pull/28394#issuecomment-5456527290 for more, but the types on these were being inferred incorrectly by mypy with just the addition of the `allows_duplicate_labels` kwarg. cc @simonjayhawkins & @WillAyd. Hopefully I got things correct. I copied the use of TypeVar for FrameOrSeries with IndexOrSeries.
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MDExOlB1bGxSZXF1ZXN0MzMyMTQxNTIw
29,206
Turn on wget output
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2019-10-24T16:39:42Z
2019-10-25T00:36:10Z
2019-10-25T00:36:10Z
MEMBER
null
Trying to see why the 36 build keeps hanging
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29,207
Clean up noqa E241
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1
2019-10-24T17:01:55Z
2019-10-24T18:38:04Z
2019-10-24T18:38:04Z
MEMBER
null
Since we use black some of the whitespace codes for flake8 might not be applicable anymore. E241 in particular, which is for multiple spaces after a comma I don't think should appear anymore A quick grep shows the following - if anyone would like to clean these up by deleting the noqa should make for an easy contributing I think ```sh $ grep "# noqa: E241" -r pandas --include="*.py" pandas/tests/dtypes/test_inference.py: ([1], True, "list"), # noqa: E241 pandas/tests/dtypes/test_inference.py: ([], True, "list-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: ((1,), True, "tuple"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (tuple(), True, "tuple-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: ({"a": 1}, True, "dict"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (dict(), True, "dict-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: ({"a", 1}, "set", "set"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (set(), "set", "set-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (frozenset({"a", 1}), "set", "frozenset"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (frozenset(), "set", "frozenset-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (iter([1, 2]), True, "iterator"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (iter([]), True, "iterator-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: ((x for x in [1, 2]), True, "generator"), # noqa: E241 pandas/tests/dtypes/test_inference.py: ((_ for _ in []), True, "generator-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (Series([1]), True, "Series"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (Series([]), True, "Series-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (Series(["a"]).str, True, "StringMethods"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (Series([], dtype="O").str, True, "StringMethods-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (Index([1]), True, "Index"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (Index([]), True, "Index-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (DataFrame([[1]]), True, "DataFrame"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (DataFrame(), True, "DataFrame-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (np.ndarray((2,) * 1), True, "ndarray-1d"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (np.array([]), True, "ndarray-1d-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (np.ndarray((2,) * 2), True, "ndarray-2d"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (np.array([[]]), True, "ndarray-2d-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (np.ndarray((2,) * 3), True, "ndarray-3d"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (np.array([[[]]]), True, "ndarray-3d-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (np.ndarray((2,) * 4), True, "ndarray-4d"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (np.array([[[[]]]]), True, "ndarray-4d-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (np.array(2), False, "ndarray-0d"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (1, False, "int"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (b"123", False, "bytes"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (b"", False, "bytes-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: ("123", False, "string"), # noqa: E241 pandas/tests/dtypes/test_inference.py: ("", False, "string-empty"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (str, False, "string-type"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (object(), False, "object"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (np.nan, False, "NaN"), # noqa: E241 pandas/tests/dtypes/test_inference.py: (None, False, "None"), # noqa: E241 pandas/tests/test_strings.py: ("contains", ("a",), {}), # noqa: E241 pandas/tests/test_strings.py: ("count", ("a",), {}), # noqa: E241 pandas/tests/test_strings.py: ("decode", ("UTF-8",), {}), # noqa: E241 pandas/tests/test_strings.py: ("encode", ("UTF-8",), {}), # noqa: E241 pandas/tests/test_strings.py: ("endswith", ("a",), {}), # noqa: E241 pandas/tests/test_strings.py: ("extract", ("([a-z]*)",), {"expand": False}), # noqa: E241 pandas/tests/test_strings.py: ("extract", ("([a-z]*)",), {"expand": True}), # noqa: E241 pandas/tests/test_strings.py: ("extractall", ("([a-z]*)",), {}), # noqa: E241 pandas/tests/test_strings.py: ("find", ("a",), {}), # noqa: E241 pandas/tests/test_strings.py: ("findall", ("a",), {}), # noqa: E241 pandas/tests/test_strings.py: ("get", (0,), {}), # noqa: E241 pandas/tests/test_strings.py: ("index", ("",), {}), # noqa: E241 pandas/tests/test_strings.py: ("join", (",",), {}), # noqa: E241 pandas/tests/test_strings.py: ("ljust", (10,), {}), # noqa: E241 pandas/tests/test_strings.py: ("match", ("a",), {}), # noqa: E241 pandas/tests/test_strings.py: ("normalize", ("NFC",), {}), # noqa: E241 pandas/tests/test_strings.py: ("pad", (10,), {}), # noqa: E241 pandas/tests/test_strings.py: ("partition", (" ",), {"expand": False}), # noqa: E241 pandas/tests/test_strings.py: ("partition", (" ",), {"expand": True}), # noqa: E241 pandas/tests/test_strings.py: ("repeat", (3,), {}), # noqa: E241 pandas/tests/test_strings.py: ("replace", ("a", "z"), {}), # noqa: E241 pandas/tests/test_strings.py: ("rfind", ("a",), {}), # noqa: E241 pandas/tests/test_strings.py: ("rindex", ("",), {}), # noqa: E241 pandas/tests/test_strings.py: ("rjust", (10,), {}), # noqa: E241 pandas/tests/test_strings.py: ("rpartition", (" ",), {"expand": False}), # noqa: E241 pandas/tests/test_strings.py: ("rpartition", (" ",), {"expand": True}), # noqa: E241 pandas/tests/test_strings.py: ("slice", (0, 1), {}), # noqa: E241 pandas/tests/test_strings.py: ("slice_replace", (0, 1, "z"), {}), # noqa: E241 pandas/tests/test_strings.py: ("split", (" ",), {"expand": False}), # noqa: E241 pandas/tests/test_strings.py: ("split", (" ",), {"expand": True}), # noqa: E241 pandas/tests/test_strings.py: ("startswith", ("a",), {}), # noqa: E241 pandas/tests/test_strings.py: ("translate", ({97: 100},), {}), # noqa: E241 pandas/tests/test_strings.py: ("wrap", (2,), {}), # noqa: E241 pandas/tests/test_strings.py: ("zfill", (10,), {}), # noqa: E241 ```
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REF: Dependency Structure Simplification
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2019-10-24T17:34:19Z
2020-09-05T19:04:03Z
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MEMBER
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This is intended to describe a) possible refactors that would simplify the intra-pandas dependency structure, b) the benefits we would see from implementing these refactors, and c) the difficulties each would entail. <b>Straightforward Circular Dependencies</b> - [ ] imports from `pd.core.util.hashing` in `pd.util.__init__` Fix: Just remove that import, difficulty depends on if that needs a deprecation cycle. - [ ] runtime import of `tseries.frequencies.to_offset` into `tslibs` Fix: Move most of tseries.offsets and about half of tseries.frequencies into tslibs - `tseries.offsets.generate_range` is the only part of `tseries.offsets` that is not needed; it can go to `arrays._ranges`, which is the only place where it is used - `tslibs.offsets` would become a very big module unless it were split into smaller pieces - `cache_readonly` is needed by some classes in `tseries.offsets` (which would be moved to `tslibs.offsets`), would need to put somewhere "upstream" of tslibs. - [x] `_libs.internals` runtime import of `Int64Index` - For `BlockPlacement.isin`, which is only used in one place in `core.internals`, the `isin` method could be refactored out of the class. - This one is really only worthwhile if we expect to implement tests/benchmarks specific to `_libs.internals` - [x] runtime import of `pd.unique` in `IntervalTree.get_loc_interval` - I _think_ its the case that the argument passed to pd.unique is always int64 (@jschendel is this accurate?). If so, implementing a `unique_int64` in either `_libs.hashtables` or `_libs.algos` takes about 3 lines, could be a nice fastpath for a very common case. <b>core.dtypes</b> - `core.dtypes.common` is used all over the place. It would be really nice if its dependencies were simple. But: - it imports `CategoricalDtype`, which has runtime imports from `pandas.core.util.hashing`, in particular functions that have runtime imports of `Categorical`, `Index`, `MultiIndex`, and `factorize` - `algorithms.factorize` has runtime imports from `pandas.core.sorting`, which has a dependency on `algorithms` and runtime import of `Index`. - I _think_ the "heavy" dependencies on `Categorical`/`Index`/`MultiIndex` are mostly just for the constructors and could be refactored into much lighter-weight implementations. I'm imagining something like `core.factorization` that depended only on `_libs` and maybe a few of the `is_foo_dtype` functions (the latter would still be circular, but a much smaller circle)
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29,209
Clean up noqa E241 #29207
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3
2019-10-24T17:40:27Z
2019-10-25T04:54:30Z
2019-10-24T18:38:04Z
CONTRIBUTOR
null
- [X] closes #29207 - [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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29,210
CLN: Remove unnecessary sys.version_info checks
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3
2019-10-24T18:28:23Z
2019-10-25T15:03:55Z
2019-10-25T12:44:19Z
MEMBER
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Title is self-explanatory.
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29,211
Adding test for assert_equal_index with empty iterables
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2019-10-24T18:52:58Z
2019-10-30T07:13:21Z
2019-10-29T15:22:48Z
CONTRIBUTOR
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- [x] closes #16844 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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29,212
CI: Drop Python 3.5 support
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9
2019-10-24T19:05:47Z
2019-11-08T14:48:41Z
2019-11-08T14:48:11Z
MEMBER
null
- [X] closes #29034 - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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29,213
BUG: pd.Dataframe.from_dict when first value is a list
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NONE
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#### Reproducible example: ```python import pandas as pd tmp_scen = {'name': 'Current conditions', 'actionSet': ['not_irrigated', 'cover_crop_none', 'mar_none'], 'cost': 0.0, 'totalNitrogen': 9.649798364504209, 'totalPhosphorus': 2.4570326616674745, 'sediment': 1.2039077716577735, 'appliedWater': 11.607623110151138, 'infiltrationVolume': 0.7424774065057028, 'acres': 3.382359912104316, 'irrType': 'not_irrigated'} good_result = pd.DataFrame.from_dict(tmp_scen, orient = 'index') tmp_scen = {'actionSet': ['not_irrigated', 'cover_crop_none', 'mar_none'], 'name': 'Current conditions', 'cost': 0.0, 'totalNitrogen': 9.649798364504209, 'totalPhosphorus': 2.4570326616674745, 'sediment': 1.2039077716577735, 'appliedWater': 11.607623110151138, 'infiltrationVolume': 0.7424774065057028, 'acres': 3.382359912104316, 'irrType': 'not_irrigated'} error_result = pd.DataFrame.from_dict(tmp_scen, orient = 'index') ``` #### Problem description Error when creating a dataframe from a dictionary when the first item in the dictionary is a list. See reproducible example above. ``` TypeError: object of type 'float' has no len() ``` #### Expected Output ```good_result Out[369]: 0 actionSet [not_irrigated, cover_crop_none, mar_none] name Current conditions cost 0 totalNitrogen 9.6498 totalPhosphorus 2.45703 sediment 1.20391 appliedWater 11.6076 infiltrationVolume 0.742477 acres 3.38236 irrType not_irrigated ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit: None python: 3.7.3.final.0 python-bits: 64 OS: Windows OS-release: 10 machine: AMD64 processor: Intel64 Family 6 Model 158 Stepping 9, GenuineIntel byteorder: little LC_ALL: None LANG: en LOCALE: None.None pandas: 0.24.2 pytest: 4.4.1 pip: 19.0.3 setuptools: 40.8.0 Cython: 0.29.6 numpy: 1.16.2 scipy: 1.2.1 pyarrow: None xarray: None IPython: 7.4.0 sphinx: 1.8.5 patsy: 0.5.1 dateutil: 2.8.0 pytz: 2018.9 blosc: None bottleneck: 1.2.1 tables: 3.5.1 numexpr: 2.6.9 feather: None matplotlib: 3.0.3 openpyxl: 2.6.1 xlrd: 1.2.0 xlwt: 1.3.0 xlsxwriter: 1.1.5 lxml.etree: 4.3.2 bs4: 4.7.1 html5lib: 1.0.1 sqlalchemy: 1.3.1 pymysql: 0.9.3 psycopg2: None jinja2: 2.10 s3fs: None fastparquet: None pandas_gbq: None pandas_datareader: None gcsfs: None </details>
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