Pandas BUG: very slow groupby(col1)[col2].value_counts() for columns of type 'category'

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

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)

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

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.

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

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)

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()

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

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

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

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]

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

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

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

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?

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

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

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

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

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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