3.21python作业

最新推荐文章于 2024-02-20 13:23:44 发布

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这篇博客展示了Python中对字典的各种遍历操作，包括打印字典键值、组合多个字典为列表、展示朋友喜欢的城市以及详细城市信息。涉及到的关键字有字典遍历、键值对、城市信息等。

# 6-1
friend1 = {
    'first_name' : 'Donald',
    'last_name' : 'Trump',
    'age' : '71',
    'city' : 'New York',
}

for key in friend1:
    print(key +  ' is '+friend1[key])

# 6-5
rivers = {
    'changjiang river' : 'china',
    'mississippi river' : 'america',
    'nile' : 'egypt'
}

for key in rivers.keys():
    print('The ' + key.title() + ' runs through ' + rivers[key].title() + '.')

# 6-7

friend2 = {
    'first_name' : 'Barack',
    'last_name' : 'Obama',
    'age' : '56',
    'city' : 'Hawaii',
}

friend3 = {
    'first_name' : 'Cheng',
    'last_name' : 'Long',
    'age' : '63',
    'city' : 'Hong Kong'
}

people = [friend1 , friend2 , friend3]
for fri in people:
    for key in fri.keys():
        print(key.title() + ':' + fri[key] )
    print('')


# 6-9
favorite_places = {
    'Trump' : ['Shanghai' , 'Beijing'],
    'Obama' : ['Guangzhou', 'Hangzhou'],
    'Mike' : ['Xiamen','Beijing']
}
for friend in favorite_places:
    print('My friend ' + friend + "'favorite places are ", end='')
    for place in favorite_places[friend]:
        print(place , end = ' ')
    print()


# 6-10
cities ={
    'Guangzhou' : {
        'country' : 'China',
        'population(thousand)' : 14498,
        'fact' : 'The city is in the south of China.' ,
    },
    'London' : {
        'country' : 'England',
        'population(thousand)' : 8280,
        'fact' :  'It is the capital of England.' ,
    },
    'New York' : {
        'country' : 'America',
        'population(thousand)' : '8510',
        'fact' : "It's an international city."  ,
    },
}

for key_city in cities:
    print(key_city + ':')
    for inf in cities[key_city].keys():
        print('\t' + inf + ':' + str(cities[key_city][inf]))