core.py 文件源码

def shrink_mask(self):
        """
        Reduce a mask to nomask when possible.

        Parameters
        ----------
        None

        Returns
        -------
        None

        Examples
        --------
        >>> x = np.ma.array([[1,2 ], [3, 4]], mask=[0]*4)
        >>> x.mask
        array([[False, False],
               [False, False]], dtype=bool)
        >>> x.shrink_mask()
        >>> x.mask
        False

        """
        m = self._mask
        if m.ndim and not m.any():
            self._mask = nomask
        return self