@Wrap decorator

Catalog

The main role

Example

---

The main role

eliminate ( Decorated function name, etc attribute Changes ) side effect

Example

No addition @wrap,example Functions are decorated , Then its attribute value will be decorated by function my_decorator overwrite

from functools import wraps   


def my_decorator(func):

    def wrapper(*args, **kwargs):
        '''decorator'''
        print('Calling decorated function...')

        return func(*args, **kwargs)
    
    return wrapper  
 

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


print(example.__name__, example.__doc__)

wrapper decorator

added @wrap：

from functools import wraps


def my_decorator(func):

    @wraps(func)
    def wrapper(*args, **kwargs):
        '''decorator'''
        print('Calling decorated function...')

        return func(*args, **kwargs)

    return wrapper


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


print(example.__name__, example.__doc__)

example Docstring