code: def set_geometry(self, geom):
          
          (self.thet0, self.thet, self.phi0, self.phi, self.alpha, 
              self.beta) = geom
docs: A convenience function to set the geometry variables.
  
          Args:
              geom: A tuple containing (thet0, thet, phi0, phi, alpha, beta).
              See the Scatterer class documentation for a description of these
              angles.