Which built-in decorator is used to enforce that a function is only called once?

Question

The@functools.singledispatchdecorator is used to define a single-dispatch generic function, ensuring that the function is only called once for a particular type.

Accepted Answer

@functools.lru_cache

Answer

@staticmethod

Answer

@functools.singledispatch

Answer

@functools.singledispatchmethod

Question 470: Which built-in decorator is used to enforce that a function is only called once?