shriyakalakata

Since this PR has been inactive for over two months, can I create a new PR using advice from the comment on #27485 : "I think it could translate well...

Working on `pandas.Index.map`, `pandas.Index.hasnans`, `pandas.Index.nbytes`,

Working on ``` -i "pandas.Index.droplevel RT03,SA01" \ -i "pandas.Index.dropna RT03,SA01" \ -i "pandas.Index.fillna RT03" \ ```

Working on ``` -i "pandas.Index.inferred_type SA01" \ -i "pandas.Index.item SA01" \ -i "pandas.Index.slice_locs RT03" \ ```

Working on ``` -i "pandas.Index.append PR07,RT03,SA01" \ -i "pandas.Index.difference PR07,RT03,SA01" \ ```

Working on ``` -i "pandas.Index.drop PR07,SA01" \ -i "pandas.Index.reindex PR07" \ ```

Working on ``` -i "pandas.Index.insert PR07,RT03,SA01" \ -i "pandas.Index.intersection PR07,RT03,SA01" \ ```

Working on ``` -i "pandas.Index.symmetric_difference PR07,RT03,SA01" \ -i "pandas.Index.union PR07,RT03,SA01" \ ```

Working on ``` -i "pandas.Index.join PR07,RT03,SA01" \ ```

Working on `pandas.DataFrame.assign`, `pandas.DataFrame.bfill`, and `pandas.DataFrame.ffill`