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Pandas BUG: very slow groupby(col1)[col2].value_counts() for columns of type 'category'
2025-02-08 22:15:36
15149
Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...
Pandas BUG: SeriesGroupBy.value_counts sorts when sort=False
2025-02-08 22:15:31
1251
In the 2nd example, the column gender is reverse-lexicographically sorted (male then female).df = DataFrame( { ...
Pandas read_sas floating point error (SAS version 6)
2025-02-08 22:15:25
4222
I've found a bug in read_sas, where on certain fields, 0.0 (floats) are read in as 5.397605e-79 (lowest IBM float value)...
Pandas BUG: parsing boolean raises TypeError without format, ValueError with format
2025-02-08 22:15:21
7729
Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...
Pandas DOC: boxplot documentation for layout parameter is not correct.
2025-02-08 22:15:14
741
Pandas version checks[X] I have checked that the issue still exists on the latest versions of the docs on main hereLocat...
Pandas ENH: Cast string dtype to nullable numeric types in to_numeric
2025-02-08 22:15:10
991
https://github.com/pandas-dev/pandas/pull/37268 fixed a bug so that nullable string dtype can now be cast to numeric fro...
Pandas series.to_json + isoformat: bad serialization of naive dates (as utc stamps)
2025-02-08 22:15:03
1941
Exhibited therefrom datetime import datetimeimport pandas as pddef test_json(): series = pd.Series( [1., 2., 3...
Pandas It is not clear whether database connection need to be closed manually after calling pd.read_sql()
2025-02-08 22:14:58
2843
The document does not mention it.Comment From: verascityI think this is a good point. Maintainers, correct me if I'm wro...
Pandas BUG: to_numpy is now failing given incompatible na_value
2025-02-08 22:14:53
2341
Pandas version checks[X] I have checked that this issue has not already been reported.[ ] I have confirmed this bug exis...
Pandas ENH: guess ISO8601 formats without separators
2025-02-08 22:14:48
1399
Feature Type[ ] Adding new functionality to pandas[ ] Changing existing functionality in pandas[ ] Removing existing fun...
Pandas BUG: groupby with empty object, categorical grouper, and dropna=False fails
2025-02-08 22:14:43
224
df = DataFrame({'a': [1, 1, 2], 'b': [3, 4, 5]})df['a'] = df['a'].astype('category')df = df.iloc[:0]gb = df.groupby('a',...
Pandas PERF: performance regression in assigning value to df[col_name]
2025-02-08 22:14:38
6599
Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this issue ex...
Pandas BUG: int types are converted to float when using to_dict() and iloc functions together
2025-02-08 22:14:34
2473
Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...
Pandas BUG: DataFrameGroupBy.value_counts when grouper has a frequency
2025-02-08 22:14:29
7937
Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...
Pandas BUG: Groupby transform with missing groups
2025-02-08 22:14:25
5433
In a groupby/transform when some of the groups are missing, should the transformed values be set to missing (my preferen...
Pandas CI: No single CPU builds for pytest.mark.single test?
2025-02-08 22:14:18
1418
The single mark is supposed to be for mark a test as single cpu onlyIf I am interpreting the purpose correctly, these te...
Pandas BUG: unwanted type conversion when partial reassigning
2025-02-08 22:14:13
4949
Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...
Pandas BUG: Interchange Column.size() is still called as a property in some places
2025-02-08 22:14:08
2192
Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...
Pandas STYLE place standard library imports at top of file
2025-02-08 22:14:03
2623
Imports should typically be placed at the top of files. Sometimes, imports are placed inside functions to:- avoid circul...
Pandas BUG: Series.searchsorted(...) fails with Timestamp DataFrames
2025-02-08 22:13:58
5984
Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...
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