def others(func): #define a other decorator def __decorator(): print '***other decorator***' func() return __decorator @others #apply two of decorator @printdebug def login(): print('in login:') @printdebug #switch decorator order @others def logout(): print('in logout:') login...
importtime# 定义一个装饰器: 统计函数运行时间defdisplay_time(func):''' define a decorator函数,参数是函数 '''defwrapper(): t_start = time.time() func() t_stop = time.time()print("time consumed: {:.4}".format(t_stop - t_start))returnwrapper# 判断输入的num是否是质数defis_prime(num...
As mentioned earlier, A Python decorator is a function that takes in a function and returns it by adding some functionality. In fact, any object which implements the special__call__()method is termed callable. So, in the most basic sense, a decorator is a callable that returns a callable...
# Define a decorator function def log_function_call(func): def wrapper(*args, **kwargs): print(f"Calling function {func.__name__} with arguments {args} and keyword arguments {kwargs}") result = func(*args, **kwargs) print(f"Function {func.__name__} returned {result}") return ...
def decorator_func(some_func): # define another wrapper function which modifies some_func def wrapper_func(): print("Wrapper function started") some_func() print("Wrapper function ended") return wrapper_func # Wrapper function add something to the passed function and decorator returns the wrappe...
This decorator can be used like this: >>>@log_me...defgreet(name):...print("Hello",name)... That@log_mesyntax is a way to define function (greet) that is decorated by thislog_medecorator. This@syntax is equivalent to defining thegreetfunction first (undecorated): ...
# define another wrapperfunctionwhich modifies some_func defwrapper_func():print("Wrapper function started")some_func()print("Wrapper function ended")returnwrapper_func #Wrapperfunctionadd something to the passedfunctionand decorator returns the wrapperfunctiondefsay_hello():print("Hello") ...
You saw that, to define a decorator, you typically define a function returning a wrapper function. The wrapper function uses *args and **kwargs to pass on arguments to the decorated function. If you want your decorator to also take arguments, then you need to nest the wrapper function insi...
def decorator_func(some_func): # define another wrapper function which modifies some_func def wrapper_func(): print("Wrapper function started") some_func() print("Wrapper function ended") return wrapper_func # Wrapper function add something to the passed function and decorator returns the wrappe...
Now let's see how we'd pass arguments to the decorator itself. In order to achieve this, we define a decorator maker that accepts arguments then define a decorator inside it. We then define a wrapper function inside the decorator as we did earlier. def decorator_maker_with_arguments(decorat...