pandas.Series.add_prefix — pandas 0.24.0rc1 documentation (original) (raw)
Series. add_prefix(prefix)[source]¶
Prefix labels with string prefix.
For Series, the row labels are prefixed. For DataFrame, the column labels are prefixed.
| Parameters: | prefix : str The string to add before each label. |
|---|---|
| Returns: | Series or DataFrame New Series or DataFrame with updated labels. |
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