pandas.Series.combine_first

Series.combine_first(self, other) → 'Series'

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

Parameters

otherSeries

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

pandas.Series.combine pandas.Series.compare