gistfile1.py

def block(func, args):
    def decorator(f2):
        return func(f2, args)
    return decorator


@block(map, range(10))
def square(x):
    return x**2


print(repr(square))
print(repr(list(square)))

<map object at 0x7ffff67803d0>
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]