4-10 切片

cubes = []
for value in range(1,11):
cubes.append(value**3)
print(cubes)
print("The first three items in the list are:")
#切片不包括最后的索引值所指
print(cubes[0:3])
print("The items from the middle of the list are:")
print(cubes[4:7])
print("The last three items in the list are:")
print(cubes[-3:])

4-11 你的比萨和我的比萨

pizzas = ['seafood pizza', 'sausage pizza', 'cheese pizza']
for pizza in pizzas:
print(pizza.title())
print('I like ' + pizza + '.\n')
print('I really love pizza!')
friend_pizzas = pizzas[:]
pizzas.append('beef pizza')
friend_pizzas.append('corn pizza')
print('My favorite pizzas are:')
for pizza in pizzas:
print(pizza.title())
print("My friend's favorite pizzas are:")
for pizza in friend_pizzas:
print(pizza.title())

4-12 使用多个循环

my_foods = ['pizza', 'falafel', 'carrot cake']
friends_foods = my_foods[:]

my_foods.append('cannoli')
friends_foods.append('ice cream')

print("My favorite foods are:")
for food in my_foods:
print(food)

print("\nMy friend's favorite foods are:")
for food in friends_foods:
print(food)