wrap-test.py

from functools import wraps

 def simple_decorator(func):
    def __wrapper(*args, **kwargs):
        return func(*args, **kwargs)
    return __wrapper

def with_wraps(func):
    @wraps(func)
    def __wrapper(*args, **kwargs):
        return func(*args, **kwargs)
    return __wrapper


@simple_decorator
def simple():
    """Here is simple doc string text."""
    pass

@with_wraps
def wrapper():
    """Here is wrapper doc string text."""
    pass


# without using @wraps decorator
print(simple.__doc__)
#>>> None
print(simple.__name__)
#>>> __wrapper

# using @wraps decorator
print(wrapper.__doc__)
#>>> Here is wrapper doc string text.
print(wrapper.__name__)
#>>> wrapper