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! """ ...
在这个示例中,decorator2 首先被应用,其次是 decorator1。 结论 装饰器是Python中的一个强大功能,简化了许多常见的编程任务,如日志记录、权限控制、性能优化等。它使得代码更具可读性和可维护性,鼓励模块化和复用性。理解和熟练使用装饰器,可以大大提高开发效率和代码质量。 本文参与 腾讯云自媒体同步曝光计划,分享自微...
https://python-3-patterns-idioms-test.readthedocs.io/en/latest/PythonDecorators.html#decorators-with-arguments https://www.geeksforgeeks.org/decorators-with-parameters-in-python/ https://stackoverflow.com/questions/5929107/decorators-with-parameters """ # PythonDecorators/decorator_with_arguments.py cl...
def my_decorator(func): def wrapper(): print("Something is happening before the function is called.") func() print("Something is happening after the function is called.") return wrapper @my_decorator def say_hello(): print("Hello!") say_hello() 2. Decorator with Arguments To pass arg...
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. ...
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 ...
# PythonDecorators/decorator_function_with_arguments.pydef decorator_function_with_arguments(arg1, arg2, arg3): def wrap(f): print("Inside wrap()") def wrapped_f(*args): print("Inside wrapped_f()") print("Decorator arguments:", arg1, arg2, arg3) f(*args) print("After f(*args)"...
def decorator_with_arguments(function): def wrapper_accepting_arguments(arg1, arg2): print("My arguments are: {0}, {1}".format(arg1,arg2)) function(arg1, arg2) return wrapper_accepting_arguments @decorator_with_arguments def cities(city_one, city_two): print("Cities I love are {0} an...
return a_wrapper_accepting_arguments #因为当您调用装饰器返回的函数时,调用的包装器(wrapper),将参数传递给被包装器包装的函数 @a_decorator_passing_arguments def print_full_name(first_name, last_name): print("My name is {0} {1}".format(first_name, last_name)) ...
login('jatsz') #arguments:jatsz 我们来解释一下login(‘jatsz’)的调用过程: [decorated] login(‘jatsz’) => printdebug(login)(‘jatsz’) => __decorator(‘jatsz’) => [real] login(‘jatsz’) 2,装饰器本身有参数 我们在定义decorator时,也可以带入参数,比如我们这样使用decorator,我们传入一...