Aphelmion

def add_item(item, items=None):
    if items is None:
        items = []

Aphelmion

"""
Design an in-memory key–value store with TTL

You are asked to implement a very simple in-memory key–value store for configuration data.
The store supports four operations:

set(key, value, ttl_seconds, now)
get(key, now)
delete(key, now)

Aphelmion

class A:
    def say(self):
        print("A")


class B(A):
    def say(self):
        print("B")

Aphelmion

class debug:
    def __init__(self, func):
        self.func = func

    def __get__(self, instance, owner):
        if instance is None:
            return self.func

        def wrapper(*args, **kwargs):
            print(f"Calling {self.func.__name__} of {instance!r}")