Callable objects approach vs nested scope approach to create higher order functions - python

Question

If I am not wrong, there are two ways to create higher-order functions in python - using callable objects and nested scopes. Which one is more efficient?

Answer 1

Using callable objects has a disadvantage over using nested scopes as the code is generally longer and works slower. But it has an advantage as a collection of callables can share their signature via inheritance. The best practice would be to analyze the situation and use the best approach.