decorator to limit API requests when using Python as API client

apilimit.py

from datetime import datetime, timedelta

class ApiLimit:
    def __init__(self, request_limit, time_limit_second):
        self.api_count = 0
        self.request_limit = request_limit
        self.time_limit_second = time_limit_second
        self.start = None

    def __call__(self, func):
        def wrapper(*args, **kwargs):
            if self.start is None:
                self.start = datetime.now()

            if self.api_count >= self.request_limit and datetime.now() - self.start < timedelta(seconds=self.time_limit_second):
                print(f"API制限のため待機({self.time_limit_second}秒間に{self.request_limit}リクエストまで)")
                while datetime.now() - self.start < timedelta(seconds=self.time_limit_second):
                    pass
                print("API制限解除。再開")
            
            ret = func(*args, **kwargs)
            self.api_count += 1
            if self.api_count > self.request_limit:
                self.api_count = 1
                self.start = datetime.now()
            return ret

        return wrapper
api_limit = ApiLimit(100, 10)

@api_limit
def f():
    return 1

@api_limit
def g():
    return 2

while True:
    print(f())
    print(g())