Mean of all the values in the SArray, or mean image.

        Returns None on an empty SArray. Raises an exception if called on an
        SArray with non-numeric type or non-Image type.

        Returns
        -------
        out : float | turicreate.Image
            Mean of all values in SArray, or image holding per-pixel mean
            across the input SArray.

def mean(self):
        """
        Mean of all the values in the SArray, or mean image.

        Returns None on an empty SArray. Raises an exception if called on an
        SArray with non-numeric type or non-Image type.

        Returns
        -------
        out : float | turicreate.Image
            Mean of all values in SArray, or image holding per-pixel mean
            across the input SArray.
        """
        with cython_context():
            if self.dtype == _Image:
                from  .. import extensions
                return extensions.generate_mean(self)
            else:
                return self.__proxy__.mean()