Pandas version checks

• I have checked that the issue still exists on the latest versions of the docs onmainhere

Location of the documentation

• https://pandas.pydata.org/docs/dev/reference/api/pandas.Series.name.html
• https://pandas.pydata.org/docs/dev/reference/api/pandas.DataFrame.pivot.html

Documentation problem

In the documentation,Series.name isjust required to be aHashable. Whenpandas functions ask for a column label, however, it often asks for anstr, e.g. inDataFrame.pivot, where it says

columns:str or object or a list of str

Suggested fix for documentation

UseHashable everywhere to column labels as a function argument