def distance_point_to_plane(pt: 'mathutils.Vector', plane_co:
    'mathutils.Vector', plane_no: 'mathutils.Vector') ->float:
    """Returns the signed distance between a point and a plane (negative when below the normal). 

    :param pt: Point 
    :type pt: 'mathutils.Vector'
    :param plane_co: A point on the plane 
    :type plane_co: 'mathutils.Vector'
    :param plane_no: The direction the plane is facing 
    :type plane_no: 'mathutils.Vector'
    """
    pass
