python装饰器的wraps作用

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不加:

from functools import wraps
def my_decorator(func):
    def wper(*args, **kwargs):
        ‘‘‘decorator‘‘‘
        print(Calling decorated function...)
        return func(*args, **kwargs)
    return wper

@my_decorator
def example():
    """Docstring"""
    print(Called example function)


print(example.__name__, example.__doc__)#wper decorator

加:

from functools import wraps
def my_decorator(func):
    @wraps(func)
    def wper(*args, **kwargs):
        ‘‘‘decorator‘‘‘
        print(Calling decorated function...)
        return func(*args, **kwargs)
    return wper
 
@my_decorator
def example():
    """Docstring""" 
    print(Called example function)


print(example.__name__, example.__doc__)#example Docstring

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