Cached Property

Provides a thread safe @cached_property decorator that can be used in place of the built in @property decorator for properties that are expensive to compute or that aren't expected to change over the lifetime of an instance.

Usage

>>> from cached_property import cached_property
>>> class MyClass:
...     @cached_property
...     def prop(self):
...         return 2 ** 42
...
>>> instance = MyClass()
>>> "prop" in instance.__dict__
False
>>> instance.prop  # value computed and cached
4398046511104
>>> "prop" in instance.__dict__
True
>>> instance.prop  # cached value returned directly
4398046511104