python 入门到实践第六章练习题

user_info = {
    'first_name':'alex',
    'last_name':'wei',
    'age':'31',
    'city':'cq',
}#创建一个字典

print("用户的姓是：" + user_info['first_name'])#打印字典内的first_name健对于到的值
print("用户的名是：" + user_info['last_name'])
print("用户的全名是：" + user_info['first_name'] + user_info['last_name'])
print("用户的年龄是：" + user_info['age'] + "岁")
print("用户的居住城市是：" + user_info['city'])

print("
")

'''6-2'''
names = ['alex','eric','toto','pipi','yang']
fave_nums = {
    'alex':5,
    'eric':8,
    'toto':12,
    'pipi':99,
    'yang':125,
            }

for i in names:
    print(i + ":" + str(fave_nums[i]))

print("
")
'''6-3'''

zidian = {
    'print':'打印',
    'list':'将内容写进列表',
    'range':'范围',
    'in':'在什么里面',
    'not in':'不在范围内',
}

print("print:" + "
" + zidian['print'])
print("list:" + "
" + zidian['list'])
print("range:" + "
" + zidian['range'])
print("in:" + "
" + zidian['in'])
print("not in:" + "
" + zidian['not in'])

'''6-4'''

zidian = {
    'print':'打印',
    'list':'将内容写进列表',
    'range':'范围',
    'in':'在什么里面',
    'not in':'不在范围内',
}#创建一个字典

zidian['for'] = '循环'#新增一个键-值到字典中
zidian['if'] = '判断'#新增一个键-值到字典中
zidian['set'] = '集合'#新增一个键-值到字典中
zidian['else'] = '否则判断'#新增一个键-值到字典中

print("
")
for word,meaning in zidian.items():#用items方法遍历字典
    print(word + ":" + meaning)

print("
")


'''6-5'''

rivers = {
    '西藏':'长江',
    '四川':'长江',
    '重庆':'嘉陵江',
    '黑龙江':'黑龙江',
    '青海':'黑龙江',
    '中国':'黄河',
}#创建一个字典，特别注意字典的键不能重复，值可以重复

for river , diqu in  rivers.items():#用items的方法遍历整个字典，并传给变量
    print(diqu + "流经" + river )

print("
")

for river in  rivers.values():
    print(river)

print("
")

for key in rivers.keys():
    print(key)

'''6-7'''
alex = {'fistname':'alex','lastname':'wei','age':31,'city':'cq'}#创建一个字典
cres = {'fistname':'crys','lastname':'peng','age':28,'city':'sc'}
eric = {'fistname':'eric','lastname':'feng','age':29,'city':'bj'}

people = [alex,cres,eric]#列表中存字典

for name in people:#遍历整个了列表，返回的值为字典
    #print(name)
    full_name = name['fistname'] + name['lastname']#返回的是字典，所以用字典的方法取值
    print(full_name+":")
    for name_a , info in name.items():
        print("	"+name_a+":"+str(info))
         #print(info)
print(people[0:1])

favprote_places = {
    'alex':['cq','sc','xz'],#创建一个字典，并把列表存入字典中
    'cres':['bq','cq','sh'],
    'eric':['gz','cd','cq'],
}

'''6-9'''
print("
")
for name , city in favprote_places.items():#定义两个遍历把字典中的键值对存入变量中
    print(name+":")
    for i in city:#由于字典中的值存的是列表，所以可以用列表的方法来处理数据
        print("	"+i)
'''6-10'''


fave_nums = {
    'alex':[2,5],
    'eric':[8],
    'toto':[12,11],
    'pipi':[99,88],
    'yang':[125],
            }

print("
")
for name_b , number in fave_nums.items():
    if len(number) > 1:#给一个判断，用len函数判断number返回的值是否有多个
        print(name_b + "，喜欢多个数字，他喜欢的数字是：" )
        for i in number:#用for循环取回字典中列表的值
            print(i)
    else:
        print(name_b + "，喜欢只一个数字，他喜欢的数字是：")
        for i in number:
            print(i)

'''6-11'''

print("
")

cities = {
    '重庆':{
            '地区':'西部',
            '人口':'3000千万',
            '经济':'发展迅速',
        },
    '四川' : {
            '地区':'西部',
            '人口':'8500万',
             '经济':'发展迅速'
        },
    '北京' : {
            '地区':'首都',
            '人口':'2300万',
            '经济':'非常好'
        },
}#创建一个名为cities的字典，指点内键值对为别为3个字典,这种是字典中嵌套字典.


for citi_name , citi_info in cities.items():#用for 循环遍历cities的键值对，传给2个变量，其中citi_info传回去的是一个字典
    print("城市名称为：" + citi_name)
    for info , vales in citi_info.items():#由于citi_info 是一个字典所以用字典的方式取值到变量
        print("	" + info + ":" +  vales )#打印字典中的值	为打印制表符