Method set

core/tests.py:50–54

(self, key, value, nx=False, ex=None)

                self.keys = set()

            def set(self, key, value, nx=False, ex=None):
                if nx and key in self.keys:
                    return False
                self.keys.add(key)
                return True

            def delete(self, key):
                self.keys.discard(key)