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DOC: Series.update throws a FutureWarning about def[col] = df[col].method but .update returns None and works inplace #59788

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@spawn-guy

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@spawn-guy
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Pandas version checks

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

Location of the documentation

https://pandas.pydata.org/docs/dev/reference/api/pandas.Series.update.html#pandas.Series.update

Documentation problem

df.update resembles how python.dict.update works, but df.update doesn't support CoW

Suggested fix for documentation

remove FutureWarning for the df.update

or create a (for example) df.coalesce method that will, actually, return something. this shouldn't brake existing code

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    Copy / view semanticsNeeds DiscussionRequires discussion from core team before further actionRequires discussion from core team before further actionWarningsWarnings that appear or should be added to pandasWarnings that appear or should be added to pandas

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