def add_nuage_word(word=[]):
    word.append("Nuage")
    return word

if __name__ == '__main__':
    a = add_nuage_word()
    b = add_nuage_word()
    print(" ".join(a+b) == "Nuage Nuage")  # True



prices = {'apple': 0.40, 'banana': 0.50}
my_purchase = {
    'apple': 1,
    'banana': 6}

def grocery_bill():
    my_purchase = dict(my_purchase.items() + {'apple': 2}.items())
    return sum(prices[fruit] * my_purchase[fruit]
               for fruit in my_purchase)


if __name__ == '__main__':
    print(grocery_bill())


def power_generator():
        return [(lambda x: x ** i) for i in range(5)]

if __name__ == '__main__':
    for power in power_generator():
        print(power(2)) # expected output: 2^0 2^1 2^2 2^3 2^4