bigframes.pandas.Series.combine_first

Series.combine_first(other: Series) → Series

Update null elements with value in the same location in ‘other’.

Combine two Series objects by filling null values in one Series with non-null values from the other Series. Result index will be the union of the two indexes.

Examples:

>>> s1 = bpd.Series([1, np.nan])
>>> s2 = bpd.Series([3, 4, 5])
>>> s1.combine_first(s2)
0    1.0
1    4.0
2    5.0
dtype: Float64

Null values still persist if the location of that null value does not exist in other

>>> s1 = bpd.Series({'falcon': np.nan, 'eagle': 160.0})
>>> s2 = bpd.Series({'eagle': 200.0, 'duck': 30.0})
>>> s1.combine_first(s2)
falcon     <NA>
eagle     160.0
duck       30.0
dtype: Float64

Parameters:

other (Series) – The value(s) to be used for filling null values.

Returns:

The result of combining the provided Series with the other object.

Return type:

bigframes.pandas.Series