make_pretty()that takes a function as its argument and has a nested function namedinner(), and returns the inner function. We are calling theordinary()function normally, so we get the output"I am ordinary". Now, let's call it using the decorator function. defmake_pretty(func):# define...
@param_decorator("example")defexample_function():print("This is an example function") 1. 2. 3. 3. 在装饰器函数内部定义一个包裹函数,接收被装饰函数 defparam_decorator(param):defdecorator(func):defwrapper(*args,**kwargs):print(f"Decorator param:{param}")result=func(*args,**kwargs)returnr...
In the next example, we create a simple decorator example. main.py #!/usr/bin/python def enclose(fun): def wrapper(): print("***") fun() print("***") return wrapper def myfun(): print("myfun") enc = enclose(myfun) enc() The enclose function is a decoratorwhich extends ...
import random def retry(times=3): """ 重试装饰器,如果函数执行结果为None,则自动重试指定次数。 Args: times (int, optional): 重试次数,默认为3。 Returns: function: 返回被装饰的函数。 """ def decorator(func): def wrapper(*args, **kwargs): for i in range(times): re...
python2#-*- coding:utf-8 -*-deff():print"Call function f"f1=f f1()#查看函数对象的名字f.__name__f1.__name__#导入functools模块#因为经过装饰的函数它们的__name__变成了decorator里面的函数名字,对于#这个例子就是write_ahead#为了把原始函数名字等属性复制到write_ahead中我们使用@functools.wraps(...
(thewraps functionis explained below) Parameterized decorator: This one allows you to pass arguments into the decorator for some additional customization. It needs to wrap everything in an additional function (creating a closure) in order to make this possible. ...
(1)当程序执行到example()是,发现函数example()上面有个装饰器@decorator,所以会先执行@decorator。@decorator等价于example = decorator(example),它可以拆分为两步: ①执行decorator(example),将函数名example作为参数传递给decorator。在调用decorator函数的过程中,首先会执行print语句,输出"正在装饰",然后会将形参func...
@timing_decorator deftime_consuming_function():# 模拟耗时操作 time.sleep(2)print("函数执行完成")time_consuming_function() 这个例子展示了如何使用装饰器记录函数的执行时间,从而方便性能分析。 2. 权限验证装饰器 代码语言:javascript 代码运行次数:0 ...
It retains access to the function being decorated and any additional state or arguments defined in the decorator function. For example: def simple_decorator(func): def wrapper(): print("Before the function call") func() print("After the function call") return wrapper @simple_decorator def ...
Help on function say_wheeinmodule whee: Example code importfunctoolsdefdecorator(func):@functools.wraps(func)defwrapper_decorator(*args, **kwargs):# Do something beforevalue = func(*args, **kwargs)# Do something afterreturnvaluereturnwrapper_decorator ...