DataFrame.
add_prefix
Prefix labels with string prefix.
For Series, the row labels are prefixed. For DataFrame, the column labels are prefixed.
The string to add before each label.
New Series or DataFrame with updated labels.
See also
Series.add_suffix
Suffix row labels with string suffix.
DataFrame.add_suffix
Suffix column labels with string suffix.
Examples
>>> s = pd.Series([1, 2, 3, 4]) >>> s 0 1 1 2 2 3 3 4 dtype: int64
>>> s.add_prefix('item_') item_0 1 item_1 2 item_2 3 item_3 4 dtype: int64
>>> df = pd.DataFrame({'A': [1, 2, 3, 4], 'B': [3, 4, 5, 6]}) >>> df A B 0 1 3 1 2 4 2 3 5 3 4 6
>>> df.add_prefix('col_') col_A col_B 0 1 3 1 2 4 2 3 5 3 4 6