noring nan
    values. Default is 'propagate'.
alternative : {'two-sided', 'less', 'greater'}, optional
    Defines the alternative hypothesis. Default is 'two-sided'.
    The following options are available:

    * 'two-sided': the correlation is nonzero
    * 'less': the correlation is negative (less than zero)
    * 'greater':  the correlation is positive (greater than zero)

    .. versionadded:: 1.7.0

Returns
-------
res : SignificanceResult
    An object containing attributes:

    statistic : float or ndarray (2-D square)
        Spearman correlation matrix or correlation coefficient (if only 2
        variables are given as parameters). Correlation matrix is square
        with length equal to total number of variables (columns or rows) in
        ``a`` and ``b`` combined.
    pvalue : float
        The p-value for a hypothesis test whose null hypothesis
        is that two sets of data are linearly uncorrelated. See
        `alternative` above for alternative hypotheses. `pvalue` has the
        same shape as `statistic`.

References
----------
[CRCProbStat2000] section 14.7

z3`use_ties=False` is not supported in SciPy >= 1.2.0Nr<