decorator_with_arguments.py class decorator_with_arguments(object): def __init__(self, arg1, arg2, arg3): # TypeError: __init__() takes 4 positional arguments but 5 were given """ If there are decorator arguments, the function to be decorated is not passed to the constructor! """ ...
class decorator_with_arguments(object): def __init__(self, arg1, arg2, arg3): # TypeError: __init__() takes 4 positional arguments but 5 were given """ If there are decorator arguments, the function to be decorated is not passed to the constructor! """ print("1. Inside __init_...
Here, when we call thedivide()function with the arguments(2,5), theinner()function defined in thesmart_divide()decorator is called instead. Thisinner()function calls the originaldivide()function with the arguments2and5and returns the result, which is0.4. Similarly, When we call thedivide()f...
(一)Decorator应用之一:Trace 函数 这个是最普通的一个应用,使用Trace函数或一个Trace类可以知道一个函数的状态和参数,这个功能可以很方便的帮助你调试代码,了解当前的运 行情况,这里将用到下面几个知识点Function as Decorator、Object as Decorator、Decorator with arguments(参数) 1.Function Decorator def traced(f...
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 inside another function. In this case, you usually end up with three return statements. You can ...
arg3):defreal_decorator(func):defwrapper(*args,**kwargs):print("Decorator arguments:",arg1,arg2,arg3)returnfunc(*args,**kwargs)returnwrapperreturnreal_decorator@decorator_with_args("Hello","World",42)defmy_function(arg1,arg2):print("Function arguments:",arg1,arg2)my_function("Hi","Tom...
format(original_function.__name__)) # 添加功能的地方 return original_funciton(*args, **kwargs) return inner_function # 创造decorator @outer_function def display(): print("display function ran") @outer_function def display_info(name, age): print("display_info func ran with arguments: {},...
format(name)) function_with_named_arguments(1, 2, 3, name='robot') # output: # Received arguments as following # (1, 2, 3) # {'name': 'robot'} # 1, 2, 3 # robot class Salary(object): def __init__(self): self.base = 666 @decorator_passing_arbitrary_arguments def total_...
Something is happening after the function is called. ``` 在这个示例中,`simple_decorator` 是一个装饰器,它在 `say_hello` 函数调用前后添加了一些额外的行为。 ### 带参数的装饰器 装饰器不仅可以用于无参数的函数,还可以处理带参数的函数。为了实现这一点,我们需要在 `wrapper` 函数中接收任意数量的参数...
This example shows how to deal with variable number of parameters using the*args, **kwargssyntax. Modifying data The decorator function can modify the data of the decorated function. main.py #!/usr/bin/python def uppercase(fun): def wrapper(): ...