Caching class attributes in Python

Question

I\'m writing a class in python and I have an attribute that will take a relatively long time to compute, so I only want to do it once. Also, it will not be

Answer 1

The dickens package (not mine) offers cachedproperty, classproperty and cachedclassproperty decorators.

To cache a class property:

from descriptors import cachedclassproperty

class MyClass:
    @cachedclassproperty
    def approx_pi(cls):
        return 22 / 7