1.列表实例：由字符串创建一个作业评分列表，做增删改查询统计遍历操作。例如，查询第一个3分的下标，统计1分的同学有多少个，3分的同学有多少个等。
 
s = {'01':'100','02':'99','03':'98','04':'97','05':'96','05':'96','06':'95','07':'98','08':'90','09':'91'}
print('成绩表：',s)
s.pop('09')
print('成绩表：',s)
print('主键是：',s.keys())
print('分数是：',s.values())
x = input('输入学号查分数：')
print(s.get(x,"没有这个人的分数"))

 

2.字典实例：建立学生学号成绩字典，做增删改查遍历操作。

  
zd={"王维":"90","柳丁":"98","许发":"77","张嗯嗯":"88"}
print(zd)
zd['王维']='59' print(zd)

 

 

3.列表，元组，字典，集合的遍历。
总结列表，元组，字典，集合的联系与区别。
lb=list('1223334444455555666666')
yz=tuple('1223334444455555666666')
jh=set('1223334444455555666666')
zd={"jyb":"b6014","zzx":"b5008","hzt":"b6016"}
print('列表遍历：')
print(lb)
for i in lb:
    print(i,end=' ')
print('\n')
print('元组遍历：')
for i in yz:
    print(i,end=' ')
print('\n')
print('集合遍历：')
for i in jh:
    print(i,end=' ')
print('\n')
print('字典遍历：')
for i in zd:
    print(i,end=' ')

4.英文词频统计实例

  1. 待分析字符串
  2. 分解提取单词
    1. 大小写 txt.lower()
    2. 分隔符'.,:;?!-_’
  3. 计数字典
  4. 排序list.sort()
  5. 输出TOP(10)

    panama='''Daca nici asa nu-ti place
    Ia mai zboara-n Panama
    Zile zile zile zile eu alerg girl
    Mile mile mile mile pe maidan
    Pentru tine tine sa-ti dau un dar dar
    Cel mai de pret dar fara nici un ban ban
    Ganja iarba sunt inutile-tile
    Numai tu stii sa-mi dai aripile-pile
    In Jamaica sau in Chile Chile
    Inima face Boom-Boom numai pentru tine
    Eh eh eh eh eh eh eh eh eh eh
    Numai pentru tine
    Eh eh eh eh eh eh eh eh eh eh
    N-ai raspuns la telefon
    No problem te scot pe balcon
    Si-o sa vezi cu ochii tai
    Cum ti-aduc flori un camion
    Si iti cant asa cu chitara mea
    Daca nici asa nu-ti place
    Ia mai zboara-n Panama
    Ce pana mea
    Ah ah ah ah mai zboara-n Panama
    Ah ah ah ah zboara ce pana mea
    Ah ah ah ah mai zboara-n Panama
    Ah ah ah ah hai mai zboara
    Kile-kile kile-kile eu am dat jos
    Oricum baby nu erau de folos-los
    Mi-e dor de tine sunt intors pe dos-dos
    Acasa ajung la timp tre' sa o iau pe jos-jos
    La ce ne folosesc banii banii banii
    Daca tu imi dai iubire si zi de zi pun anii
    Ca Bonnie Clyde sa fiu doar eu cu tine
    Si o sa avem girl o iubire ca in filme
    Eh eh eh eh eh eh eh eh eh eh
    O iubire ca in filme
    Eh eh eh eh eh eh eh eh eh eh Eh
    N-ai raspuns la telefon
    No problem te scot pe balcon
    Si-o sa vezi cu ochii tai
    Cum ti-aduc flori un camion
    Si iti cant asa cu chitara mea
    Daca nici asa nu-ti place
    Ia mai zboara-n Panama Ce pana mea
    Ah ah ah ah mai zboara-n Panama
    Ah ah ah ah zboara ce pana mea
    Ah ah ah ah mai zboara-n Panama
    Ah ah ah ah Eh Oh no
    Baby girl hai vino incoa'
    Am dragoste la mine o dau la schimb cu a ta
    Baby girl dragostea mea
    E de calitate dau gramul gram hai ia
    N-ai raspuns la telefon
    No problem te scot pe balcon
    Si-o sa vezi cu ochii tai
    Cum ti-aduc flori un camion
    Si iti cant asa cu chitara mea
    Daca nici asa nu-ti place
    Ia mai zboara-n Panama Ce pana mea
    Ah ah ah ah mai zboara-n Panama
    Ah ah ah ah zboara ce pana mea
    Ah ah ah ah mai zboara-n Panama
    Ah ah ah ah hai ma zboara Pwaah'''
    panama=panama.replace('?',' ')
    panama=panama.replace('!',' ')
    panama=panama.replace(',',' ')
    panama=panama.replace('.',' ')
    panama=panama.replace('-',' ')
    panama=panama.replace('&',' ')
    panama=panama.lower()

    words=panama.split(' ')
    zd={}
    key=set(words)
    for i in key:
    zd[i]=words.count(i)
    lb=list(zd.items())
    lb.sort(key=lambda x:x[1],reverse=True)
    print('频率最高top10：\n')
    for i in range(10):
    print(lb[i])

  6.