MarseyWorld/files/helpers/lazy.py

# Prevents certain properties from having to be recomputed each time they are referenced


def lazy(f):

	def wrapper(*args, **kwargs):

		o = args[0]

		if "_lazy" not in o.__dict__:
			o.__dict__["_lazy"] = {}

		name = f.__name__ + str(args) + str(kwargs),
		
		if name not in o.__dict__["_lazy"]:
			o.__dict__["_lazy"][name] = f(*args, **kwargs)

		return o.__dict__["_lazy"][name]

	wrapper.__name__ = f.__name__
	return wrapper