system_assignation/physics/physics_factory.py

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, base_path='data/physics'):
    self._handler = handler.lower().replace(' ', '_')
    self._city = city
    self._base_path = base_path
    self.factory()

  def us_new_york_city(self):
    UsNewYorkCityPhysicsParameters(self._city, self._base_path)

  def us(self):
    UsPhysicsParameters(self._city, self._base_path)

  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)()