8.20二 二

一．字典里有列表。

# 存储所点比萨的信息

pizza = {

    'crust': 'thick',

    'toppings': ['mushrooms', 'extra cheese'],

}

# 概述所点的比萨

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

for topping in pizza['toppings']:

    print("\t" + topping)

二．一人有多种喜欢的语言。

favorite_languages = {

    'jen': ['python', 'ruby'],

    'sarah': ['c'],

    'edward': ['ruby', 'go'],

    'phil': ['phthon', 'haskell'],

}

for name, languages in favorite_languages.items():

    print("\n" + name.title() + "'s favorite languages are:")

    for language in languages:

        print("\t" + language.title())

三．language in languages,favorite_languages.items(),注意错误行是前面拼写不对造成。怎么用if语句检查喜欢的语言的门数？

四．pizza,crust,toppings,

favorite_languages = {

    'jen': ['python', 'ruby'],

    'sarah': ['c'],

    'edward': ['ruby', 'go'],

    'phil': ['python', 'haskell'],

}

for name, languages in favorite_languages.items():

    if len(languages) == 1:

        print("\n" + name.title() + "'s favorite language is:")

        for language in languages:

            print("\t" + language.title())

    else:

        print("\n" + name.title() + "'s favorite languages are:")

        for language in languages:

                print("\t" + language.title())

五．干，看，写，输，想，翻，试！不停留，顽强，坚持！时间，生命。列表和字典的嵌套层级不能太多，对比示例简化。

六．pizza.py,favorie_languages.py,