from physics.physics_feeders.us_new_york_city_physics_parameters import UsNewYorkCityPhysicsParameters from physics.physics_feeders.us_physics_parameters import UsPhysicsParameters class PhysicsFactory: def __init__(self, handler, city): self._handler = handler.lower().replace(' ', '_') self._city = city self.factory() def us_new_york_city(self): UsNewYorkCityPhysicsParameters(self._city) def us(self): UsPhysicsParameters(self._city) def ca(self): raise Exception('Not implemented') def de(self): raise Exception('Not implemented') def es(self): raise Exception('Not implemented') def factory(self): getattr(self, self._handler, lambda: None)()