def handle_events(events, player, speed, controller):
  c = { K_LEFT: move_left, K_RIGHT: move_right,
           K_UP: move_up,     K_DOWN: move_down    }
  if len(events) == 0:
    return
  else:
    event = events.pop(0)
    if event.type == KEYDOWN:
      c.get(event.key, default)(player, speed)

Kör metoden utmärkt

--------------------------

def c():
  return { K_LEFT: move_left, K_RIGHT: move_right,
           K_UP: move_up,     K_DOWN: move_down    }

def handle_events(events, player, speed, controller):
  if len(events) == 0:
    return
  else:
    event = events.pop(0)
    if event.type == KEYDOWN:
      c().get(event.key, default)(player, speed)

dict is not callable
Varför?