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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def distances_from_cross_section(cross):
 """Calculate the distances in the x and y directions along a cross-section. Parameters cross : `xarray.DataArray` The input DataArray of a cross-section from which to obtain geometeric distances in the x and y directions. Returns ------- x, y : tuple of `xarray.DataArray` A tuple of the x and y distances as DataArrays """

    if (CFConventionHandler.check_axis(cross.metpy.x, 'lon')
            and CFConventionHandler.check_axis(cross.metpy.y, 'lat')):
        # Use pyproj to obtain x and y distances
        from pyproj import Geod

        g = Geod(cross.metpy.cartopy_crs.proj4_init)
        lon = cross.metpy.x
        lat = cross.metpy.y

        forward_az, _, distance = g.inv(lon[0].values * np.ones_like(lon),
                                        lat[0].values * np.ones_like(lat),
                                        lon.values,
                                        lat.values)
        x = distance * np.sin(np.deg2rad(forward_az))
        y = distance * np.cos(np.deg2rad(forward_az))

        # Build into DataArrays
        x = xr.DataArray(x, coords=lon.coords, dims=lon.dims, attrs={'units': 'meters'})
        y = xr.DataArray(y, coords=lat.coords, dims=lat.dims, attrs={'units': 'meters'})

    elif (CFConventionHandler.check_axis(cross.metpy.x, 'x')
            and CFConventionHandler.check_axis(cross.metpy.y, 'y')):

        # Simply return what we have
        x = cross.metpy.x
        y = cross.metpy.y

    else:
        raise AttributeError('Sufficient horizontal coordinates not defined.')

    return x, y