Python-сообщество

 # list of the cost of fruits in pence
list = [("apple", 55), ("orange", 60), ("pineapple", 140), ("lemon", 80)]
product =[ price for fruit, price in list]
print(sum(product))
как это - [price for fruit, price in list]
работает?

 product =[ price for fruit, price in list]

 product = []
for fruit, price in list: 
    product.append(price)