ENH: Python fallback for Cythonized groupby transformations

This issue has been created since 2022-11-17.

Ref: #49742 (comment)

Within the groupby code, when the Cython portion of _cython_agg_general encounters a NotImplementedError, it falls back to _agg_py_fallback. The method _cython_transform currently has no such fallback, and so trying to use e.g. cummin on string columns fails. I think we should instead provide a Python fallback.

More Details About Repo
Owner Name pandas-dev
Repo Name pandas
Full Name pandas-dev/pandas
Language Python
Created Date 2010-08-24
Updated Date 2022-12-07
Star Count 36164
Watcher Count 1118
Fork Count 15472
Issue Count 3683

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