DOC: `to_pickle` function takes pickle v5 but doc says only 1-4 supported

[ianozsvald]

Location of the documentation

• https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.to_pickle.html
• https://pandas.pydata.org/pandas-docs/dev/reference/api/pandas.DataFrame.to_pickle.html (same as stable)

Documentation problem

The docstring states DataFrame.to_pickle(path, compression='infer', protocol=5, storage_options=None) noting protocol 5 by default, the Parameters following text notes "The possible values are 0, 1, 2, 3, 4" which does not include protocol 5.

Suggested fix for documentation

Add "5" to the docs: "The possible values are 0, 1, 2, 3, 4, 5" which was included from Python 3.8 https://docs.python.org/3/library/pickle.html

[jorisvandenbossche]

Thanks for the catch, indeed a good easy issue!

[botplex]

I will take this one

[botplex]

take