pandas.Series.combine_first — pandas 0.24.0rc1 documentation (original) (raw)

Series. combine_first(other)[source]

Combine Series values, choosing the calling Series’s values first.

Parameters: other : Series The value(s) to be combined with the Series.
Returns: Series The result of combining the Series with the other object.

See also

Series.combine

Perform elementwise operation on two Series using a given function.

Notes

Result index will be the union of the two indexes.

Examples

s1 = pd.Series([1, np.nan]) s2 = pd.Series([3, 4]) s1.combine_first(s2) 0 1.0 1 4.0 dtype: float64