    and returning a float.

        numeric_only : bool, default False
            Include only `float`, `int` or `boolean` data.

            .. versionadded:: 1.5.0

            .. versionchanged:: 2.0.0
                The default value of ``numeric_only`` is now ``False``.

        Returns
        -------
        Series
            Pairwise correlations.

        See Also
        --------
        DataFrame.corr : Compute pairwise correlation of columns.

        Examples
        --------
        >>> index = ["a", "b", "c", "d", "e"]
        >>> columns = ["one", "two", "three", "four"]
        >>> df1 = pd.DataFrame(np.arange(20).reshape(5, 4), index=index, columns=columns)
        >>> df2 = pd.DataFrame(np.arange(16).reshape(4, 4), index=index[:4], columns=columns)
        >>> df1.corrwith(df2)
        one      1.0
        two      1.0
        three    1.0
        four     1.0
        dtype: float64

        >>> df2.corrwith(df1, axis=1)
        a    1.0
        b    1.0
        c    1.0
        d    1.0
        e    NaN
        dtype: float64
        c