Python编程 从入门到实践-6字典下

笔记出处(学习UP主视频记录) https://www.bilibili.com/video/av35698354?p=13

6.4 嵌套

6.4.1 字典列表

alien_0 = {'color': 'green', 'points': 5}
alien_1 = {'color': 'yellow', 'points': 10}
alien_2 = {'color': 'red', 'points': 15}

aliens = [alien_0, alien_1, alien_2]

for alien in aliens:
    print(alien)

{'color': 'green', 'points': 5}
{'color': 'yellow', 'points': 10}
{'color': 'red', 'points': 15}

# 创建一个外星人空列表
aliens = []

#创建30个绿色的外星人
for alien_number in range(30):
    new_alien = {'color': 'green', 'points': 5, 'speed': 'slow'}
    aliens.append(new_alien)

#显示前5个外星人
for alien in aliens[:5]:
    print(alien)
print('...')

# 显示创建了多少个外星人
print("Total number of aliens: " + str(len(aliens)))

{'color': 'green', 'points': 5, 'speed': 'slow'}
{'color': 'green', 'points': 5, 'speed': 'slow'}
{'color': 'green', 'points': 5, 'speed': 'slow'}
{'color': 'green', 'points': 5, 'speed': 'slow'}
{'color': 'green', 'points': 5, 'speed': 'slow'}
...
Total number of aliens: 30

aliens = []

for alien_number in range(30):
    new_alien = {'color': 'green', 'points': 5, 'speed': 'slow'}
    aliens.append(new_alien)

for alien in aliens[0:3]:
    if alien['color'] == 'green':
        alien['color'] = 'yellow'
        alien['speed'] = 'medium'
        alien['points'] = 10

for alien in aliens[:5]:
    print(alien)
print("...")

print("Total number of aliens: " + str(len(aliens)))

{'color': 'yellow', 'points': 10, 'speed': 'medium'}
{'color': 'yellow', 'points': 10, 'speed': 'medium'}
{'color': 'yellow', 'points': 10, 'speed': 'medium'}
{'color': 'green', 'points': 5, 'speed': 'slow'}
{'color': 'green', 'points': 5, 'speed': 'slow'}
...
Total number of aliens: 30

6.4.2 在字典中存储列表

pizza = {
    'cruse': 'thick',
    'toppings': ['mushrooms', 'extra cheese'],
    }

print("You ordered a " + pizza['cruse'] + "-crust pizza" +
      "with the following toppings:")

for topping in pizza['toppings']:
    print("	" + topping)

You ordered a thick-crust pizzawith the following toppings:
　　mushrooms
　　extra cheese

未写完......