Quick Python: Cached Property
If you have a property in an object that only needs to be computed once, consider using
cached_property to store the result and serve for future function calls.
import functools class Number: def __init__(self, n): self.n = n @functools.cached_property def is_prime(self): return all(self.n % i for i in range(2, self.n))
Let’s test it with the Mersenne prime
n = Number(524287) n.is_prime
After maybe 1-2 seconds of thinking you should get
Run it again and the result will be instantaneous!