Python class member lazy initialization

Question

I would like to know what is the python way of initializing a class member but only when accessing it, if accessed. I tried the code below and it is working but is there somethi

Answer 1

This answer is for a typical instance attribute/method only, not for a class attribute/classmethod, or staticmethod.

For Python 3.8+, how about using the cached_property decorator? It memoizes.

from functools import cached_property

class MyClass:

    @cached_property
    def my_lazy_attr(self):
        print("Initializing and caching attribute, once per class instance.")
        return 7**7**8

For Python 3.2+, how about using both property and lru_cache decorators? The latter memoizes.

from functools import lru_cache

class MyClass:

    @property
    @lru_cache()
    def my_lazy_attr(self):
        print("Initializing and caching attribute, once per class instance.")
        return 7**7**8

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Credit: answer by Maxime R.