cudf.DataFrame.add_prefix

DataFrame.add_prefix(prefix)

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