def logger(func):
    def inner(*args):
        print("Calling", func.__name__,"with args", args)
        return func(*args)
    return inner

def get_even_numbers(limit):
    i = 0
    while i <= limit:
        yield i
        i += 2

@logger
def get_even_numbers_decorated(limit):
    i = 0
    while i <= limit:
        yield i
        i += 2

@logger
def doubler(numbers):
    return map(lambda x: x + x, numbers)


print([*get_even_numbers(10)])
print([*doubler(range(6))])
print([*get_even_numbers_decorated(10)])