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def decorator1(my_func):
    def warpper(*args, **kwargs):
        print("before my_func!!!")
        my_func(*args, **kwargs)
        print("after my_func!!!")
    return warpper


from functools import wraps

def decorator2(my_func):
    @wraps(my_func)
    def warpper(*args, **kwargs):
        print("before my_func!!!")
        my_func(*args, **kwargs)
        print("after my_func!!!")
    return warpper

@decorator1
def my_func1(a, b):
    print(a + b)

@decorator2
def my_func2(a, b):
    print(a + b)

print(my_func1.__name__)
# out: warpper
print(my_func2.__name__)
# out: my_func2

from functools import wraps
def dec(*a, **kw):
    def decorator(my_func):
        @wraps(my_func)
        def warpper(*args, **kwargs):
            print(*a)
            print(**kw)
            for i in range(kw[n]):
                print("wrapper!!")
                #print(**kwargs)
                my_func(*args, **kwargs)
        return warpper
    return decorator

@dec(1,2,3, n=4, m=5)
def my_func(a, b):
    print(a + b)

my_func(1,2)

# output:
# (1, 2, 3)
# {'m': 5, 'n': 4}
# wrapper!!
# 3
# wrapper!!
# 3
# wrapper!!
# 3
# wrapper!!
# 3

# more examples https://krzysztofzuraw.com/blog/2016/python-class-decorators.html
class decorator(object):
    def __init__(self, func):
        self.func = func

    def __call__(self, *args):
        print('Called {func} with args: {args}'.format(func=self.func.func_name,
                                                       args=args))
        return self.func(*args)

@decorator
def func(x,y):
    return x,y

if __name__ == '__main__':
    func(1,2)