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...
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! """ ...
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...
arbitrary_arguments(*args,**kwargs): print('The positional arguments are', args) print('The keyword arguments are', kwargs) function_to_decorate(*args) return a_wrapper_accepting_arbitrary_arguments @a_decorator_passing_arbitrary_arguments def function_with_no_argument(): print("No arguments ...
deflog_decorator(func):defwrapper(*args,**kwargs):print(f"Calling function {func.__name__} with arguments {args} and {kwargs}")result=func(*args,**kwargs)print(f"Function {func.__name__} returned {result}")returnresultreturnwrapper ...
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...
defdecorator_with_args(arg1,arg2,arg3):defwrapper(func):definner_wrapper(*args,**kwargs):print("Decorator arguments:",arg1,arg2,arg3)returnfunc(*args,**kwargs)returninner_wrapperreturnwrapper@decorator_with_args("Hello","World",42)defmy_function(arg1,arg2):print("Function arguments:",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. ...
Decorator arguments: Hello, World Greeting name 在这个例子中,greet函数被decorator_with_args装饰,传入了两个参数。装饰器在调用greet函数之前,先打印了装饰器的参数。 注意:带参数的装饰器有两个可选参数,可以选择不传。但需要注意的是,@decorator_with_args()不能简写为@decorator_with_args,因为 decorator_wit...
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. ...