print(f"{self.func.__name__} executed in {end_time - start_time:.4f}s") return result @TimerDecorator def example_function(): time.sleep(1) print("Function executed") example_function() 在这个例子中,TimerDecorator类通过__call__方法实现了装饰器逻辑 ,测量并打印了被装饰函数example_function...
decorated_function = decorator(decorated_function)2.2.3 基础装饰器实例演示 下面是一个日志装饰器的基础实现,它会在函数执行前后打印相关信息: import time def log_decorator(func): def wrapper(*args, **kwargs): start_time = time.time() print(f"{func.__name__} started at {time.ctime(start_ti...
<method-wrapper '__call__' of function object at 0x10d0ec230> >>> 一个类实例也可以变成一个可调用对象,只需要实现一个特殊方法__call__()。 我们把 Person 类变成一个可调用对象:classPerson(object):def__init__(self, name, gender): self.name =name self.gender =genderdef__call__(self,...
my_function(1, '4', kids = ("Phoebe", "Jennifer", "Rory", [1,2])) 1. 2. 3. 4. 5. 这种的传参会输出报错: Traceback (most recent call last): File "hello.py", line 118, in <module> my_function(1, '4', kids = ("Phoebe", "Jennifer", "Rory", [1,2])) TypeError: ...
The benchmarks are variations of comparing the execution time of: foriinrange(n):pass and: deff():passforiinrange(n):f() for some suitably largen. As I mentioned above, that comes out to an absolute minimum of 150ns per function call. ...
fut.add_done_callback(cb) try: try: await waiter except futures.CancelledError: fut.remove_done_callback(cb) fut.cancel() raise if fut.done(): return fut.result() else: fut.remove_done_callback(cb) await _cancel_and_wait(fut, loop=loop) raise futures.TimeoutError() finally: timeout...
return'花费时间:{}秒'.format(time.time() - now_time)# 将打印语句换成返回值event = async_function()# 创建协程事件对象loop = asyncio.get_event_loop()# 通过get_event_loop方法获取事件循环对象task = loop.create_task(event)# 创建任务对象task.add_done_callback(task_callback)# 为而任务添加...
timeit.default_timer():默认的计时器,也就是time.perf_counter() class timeit.Timer(stmt='pass', setup='pass', timer=, globals=None):用于进行代码执行速度测试的计时类。该类有四个方法: timeit(number=1000000) autorange(callback=None) repeat(repeat=3, number=1000000) ...
但通常安装成功之后,运行代码会报错“OpenGL.error.NullFunctionError: Attempt to call an undefined function glutInit, check for bool(glutInit) before calling”。 据说是pip默认安装的是32位版本的pyopengl,而作者的操作系统是64位。网上很多大牛会去 “lfd.uci.edu/~gohlke/pyt” 网站下载适合自己的版本。比如...
time.sleep(seconds) return f"Slept for {seconds} seconds" # 使用装饰器 print(slow_function(2)) 在这个例子中,timing_decorator装饰器记录了slow_function的执行时间,并在执行后打印出来。装饰器通过接收slow_function函数,并返回一个新的函数wrapper,实现了功能的扩展。