handles.py

class GameState:
  def __init__(self):
    self.handlers = {}
    
  def default_handler(self,sw_number):
    print( "Switch %s pushed!"%sw_number)
    
  def on_switch(self,sw_number):
    if sw_number in self.handlers:
      self.handlers[sw_number]()
    else:
      self.default_handler(sw_number)

def my_special_handler():
  print( "Special handler ^_~")


g = GameState()
g.handlers[12] = my_special_handler
g.on_switch(1)
g.on_switch(12)