pandas.Series.last_valid_index

Series.last_valid_index(self) [source]

Return index for last non-NA/null value.

Returns:	`scalar : type of index`

If all elements are non-NA/null, returns None. Also returns None for empty Series/DataFrame.

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Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.25.0/reference/api/pandas.Series.last_valid_index.html