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 argume
Line 6: In this case, you called the decorator with arguments. Return a decorator function that takes a function as an argument and returns a wrapper function. Line 8: In this case, you called the decorator without arguments. Apply the decorator to the function immediately.Using this boilerpl...
Let’s modify the above example to see what happens when we add arguments to the decorator: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 # PythonDecorators/decorator_with_arguments.pyclass decorator_with_arguments(object): def __init__(self, arg1, arg2, arg3): """ If there are dec...
With that in mind, we can write a function that returns a wrapper function. 7.6.1. Nesting a Decorator Within a Function Let’s go back to our logging example, and create a wrapper which lets us specify a logfile to output to. from functools import wraps def logit(logfile='out.log')...
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 ...
Simple exampleIn 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 decorator...
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. fromfunctoolsimportwrapsdefmy_decorator(extra_value=None):def_my_decorator(...
def with_arguments(myarg1, myarg2): @wrapt.decorator def wrapper(wrapped, instance, args, kwargs): return wrapped(*args, **kwargs) return wrapper @with_arguments(1, 2) def function(): pass 使用wrapt的装饰器嵌套 import wrapt @wrapt.decorator ...
:#()#{}#Python is cool, no argument here.@a_decorator_passing_arbitrary_argumentsdeffunction_with_arguments(a, b, c):printa, b, cfunction_with_arguments(1,2,3)#outputs#Do I have args?:#(1, 2, 3)#{}#1 2 3@a_decorator_passing_arbitrary_argumentsdeffunction_with_named_arguments(a...
def my_decorator(func): def wrapper(*args, **kwargs): print("Positional arguments:", args) # 输出(1, 2) 元组 print("Keyword arguments:", kwargs) # 输出{'z': 3} 字典 result = func(*args, **kwargs) # 实际调用时会将元组和字典进行解包,并赋值给my_function函数 return result return...