Objects

@cached_property

Creates a property caching its result. One can rewrite cached value simply by assigning property. And clear cache by deleting it.

A great way to lazily attach some data to an object:

class MyUser(AbstractBaseUser):
    @cached_property
    def public_phones(self):
        return list(self.phones.filter(confirmed=True, public=True))

@monkey(cls_or_module)