foo.py

def handle_platypus(args):
  pass

def handle_dog(args):
  pass

def handle_cat(args):
  pass

def fallback(args):
  raise NoHandlerException()

def main():
  furry = check_for_furry()
  has_flippers = check_for_flippers()
  swimmer = can_it_swim()

  lookup_table = {
    # furry, has_flippers, swimmer
    (True, True, True): handle_platypus,
    (True, False, True): handle_dog,
    (True, False, False): handle_cat
  }

  fn = lookup_table.get((furry, has_flippers, swimmer), fallback)
  fn()