limits_decorator = RateLimitDecorator(calls=15, period=FIFTEEN_MINUTES) call_api = limits_decorator(call_api) limits_decorator 是RateLimitDecorator 类的一个实例,但由于RateLimitDecorator 实现了__call__方法,所以类的实例也是callable
limits_decorator=RateLimitDecorator(calls=15,period=FIFTEEN_MINUTES)call_api=limits_decorator(call_api) limits_decorator 是RateLimitDecorator 类的一个实例,但由于RateLimitDecorator 实现了__call__方法,所以类的实例也是callable 的,因此limits_decorator(call_api) 等价于limits_decorator.call(call_api), 这...
另外,写服务常常会需要记录函数调用次数 counter,或者调用API或者爬数据的时候有单位时间请求量的限制,于是我们可以实现 rate_limit 的decorator。 fromfunctoolsimportwrapsdefcountcall(func):@wraps(func)defwrapper(*args,**kwargs):wrapper.count+=1result=func(*args,**kwargs)print(f'{func.__name__} has ...
return decorator @limit_calls(3) def my_function(): print("函数被调用") # 调用示例 for _ in range(4): my_function() 在Python中是否有现成的库可以限制调用次数? 是的,Python的某些库提供了现成的功能来限制调用次数。例如,ratelimiter库可以用于限制函数的调用频率和次数。通过使用这些库,可以方便地实...
我已经找到了一个不错的 python 库 ratelimiter==1.0.2.post0 https://pypi.python.org/pypi/ratelimiter 但是,该库只能在本地范围内限制速率。即)在函数和循环中 # Decorator @RateLimiter(max_calls=10, period=1) def do_something(): pass # Context Manager rate_limiter = RateLimiter(max_calls=10...
The wrapper function is defined inside the decorator and is responsible for enforcing the rate limit and calling the original function. Inside the wrapper function, the elapsed time since the last reset is calculated. If the elapsed time is longer than the specified period, the "calls" counter ...
t in last_calls if now - t < period] if len(last_calls) >= calls: raise RuntimeError("Rate limit exceeded.") last_calls.append(now) return func(*args, **kwargs) return wrapper return decorator 用法 :Copy@rate_limiter(calls=2, period=5)def fetch_data(): ...
importtimefromfunctoolsimportwrapsdefrate_limit(max_per_second):"""装饰器,用于限制函数每秒执行的次数"""min_interval=1.0/max_per_second# 计算每次调用之间的最小间隔last_time_called=0.0# 记录上一次调用的时间@wraps(rate_limit)defdecorator(func):defwrapper(*args,**kwargs):nonlocallast_time_called...
在这个例子中,log_decorator 装饰器会在调用 calculate_sum 函数前后分别记录一条日志,显示函数名、传入的参数和返回的结果。示例2:性能计时 装饰器可以用来测量函数的执行时间,有助于性能分析和优化。import timedef timer_decorator(func): def wrapper(*args, **kwargs): start_time = time.time() ...
def rate_limit(max_per_minute): interval = 60 / max_per_minute last_call = [0] def decorator(func): def wrapper(*args, **kwargs): elapsed = time.time() - last_call[0] if elapsed < interval: time.sleep(interval - elapsed) ...