data.py 文件源码

def get_y(self, var, coords=None):
        """
        Get the y-coordinate of a variable

        This method searches for the y-coordinate in the :attr:`ds`. It first
        checks whether there is one dimension that holds an ``'axis'``
        attribute with 'Y', otherwise it looks whether there is an intersection
        between the :attr:`y` attribute and the variables dimensions, otherwise
        it returns the coordinate corresponding to the second last dimension of
        `var` (or the last if the dimension of var is one-dimensional)

        Possible types
        --------------
        var: xarray.Variable
            The variable to get the y-coordinate for
        coords: dict
            Coordinates to use. If None, the coordinates of the dataset in the
            :attr:`ds` attribute are used.

        Returns
        -------
        xarray.Coordinate or None
            The y-coordinate or None if it could be found"""
        coords = coords or self.ds.coords
        coord = self.get_variable_by_axis(var, 'y', coords)
        if coord is not None:
            return coord
        return coords.get(self.get_yname(var))