Python编程 从入门到实践 第六章习题

6-2 喜欢的数字：

favorite_number = {
    'alex' : 29,
    'leo' : 23,
    'mike' : 45,
    'John' : 100,
    'Phil' : 34,
}

输出：

Alex's favorite number is 29.
Leo's favorite number is 23.
Mike's favorite number is 45.
John's favorite number is 100.
Phil's favorite number is 34.

6-5 河流

rivers = {
    'China': 'Changjiang',
    'egypt': 'nile',
    'brazil' : 'amazon'
}

print("Messages:")
for river in rivers:
    print("The " + river.title() + " runs through " + rivers[river].title() + '.')

print("\nThe following rivers have been mentioned:")
for river in rivers.keys():
    print(river.title())

print("\nThe following countries have been mentioned: ")
for country in rivers.values():
    print(country.title())

输出：

Messages:
The China runs through Changjiang.
The Egypt runs through Nile.
The Brazil runs through Amazon.

The following rivers have been mentioned:
China
Egypt
Brazil

The following countries have been mentioned: 
Changjiang
Nile
Amazon

6-6 调查

favorite_language = {
    'jen': 'python',
    'sarah': 'c',
    'edward': 'ruby',
    'phil': 'python',
}

visited_friends = ['jen', 'sarah']
for name in favorite_language.keys():
    if name in visited_friends:
        print(name.title() + ",you participated in the survey,thank you!")
    else:
        print(name.title() + ",would you like to join us?")

输出：

Jen,you participated in the survey,thank you!
Sarah,you participated in the survey,thank you!
Edward,would you like to join us?
Phil,would you like to join us?

6-8 宠物：

pets = {
    'lili':{
        'type' : 'cat',
        'people' : 'alex',
    },
    'jordon':{
        'type': 'dog',
        'people': 'mike',
    },
    'jucy':{
        'type': 'bird',
        'people': 'leo',
    }
}

for name, infos in pets.items():
    print("\nName: " + name.title())
    print("\tType: " + infos['type'].title())
    print("\tHost: " + infos['people'].title())

输出：

Name: Lili
	Type: Cat
	Host: Alex

Name: Jordon
	Type: Dog
	Host: Mike

Name: Jucy
	Type: Bird
	Host: Leo

6-10 喜欢的数字：

favorite_number = {
    'jen': [23,45,34],
    'sarah': [45,78],
    'phil':[35,100,556,789],
}
for name, numbers in favorite_number.items():
    print("\n" + name.title() + "'s favorite numbers are: ")
    for number in numbers:
        print("\t" + str(number))

输出：

Jen's favorite numbers are: 
	23
	45
	34

Sarah's favorite numbers are: 
	45
	78

Phil's favorite numbers are: 
	35
	100
	556
	789

6-12 扩展

删去键和值：

favorite_number = {
    'jen': [23,45,34],
    'sarah': [45,78],
    'phil':[35,100,556,789],
}

del favorite_number['jen']

for name, numbers in favorite_number.items():
    print("\n" + name.title() + "'s favorite numbers are: ")
    for number in numbers:
        print("\t" + str(number))

输出：

Sarah's favorite numbers are: 
	45
	78

Phil's favorite numbers are: 
	35
	100
	556
	789