cudf.Series.add_prefix#

Series.add_prefix(prefix, axis=None)[source]#

Prefix labels with string prefix.

For Series, the row labels are prefixed. For DataFrame, the column labels are prefixed.

Parameters:
prefixstr

The string to add before each label.

Returns:
Series or DataFrame

New Series with updated labels 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

Series

>>> s = cudf.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

DataFrame

>>> df = cudf.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