第3次组合数据类型，英语词频统计

深碍√TFBOYSˉ_ 2021-09-30 14:22 215阅读 0赞

#定义一个列表
    classmates =['lucy','Bob','amy','陈四','tom',65]
    new = ['Tim','Chenjie']
    #向classmates中下标为2处插入一个元素
    classmates.insert(2,'Wuyifan')
    #使用append向末尾增加一个元素
    classmates.append('Chenjie')
    classmates.extend(new)
    print(classmates)
    classmatesSet = set(classmates)
    
    classmatesSet.add('Chenjie')
    print(classmatesSet)
    print(list('acadswet'),tuple('ababcd'))

![1479630-20181008104712261-508231204.jpg][]

#列表的遍历
    List1=['Tim',30,'Tom',20]
    print(List1)
    for one in List1:
        print(one)
    #元组的遍历
    Tuple1=('我要当歌手！')
    print(Tuple1)
    for two in Tuple1:
        print(two)
    #集合的遍历
    Set1={4,5,6,7}
    print(Set1)
    for three in Set1:
        print(three)
    #字典的遍历
    dict1 = {
        'a':10,'b':20,'c':30}
    print(dict1)
    for four in dict1:
        print(four,dict1[four])

![1479630-20181008110145362-934644970.jpg][]

总结列表，元组，字典，集合的联系与区别：

列表：有序，可做增删改查操作，用方括号\[x,y,z\]的方式表示

元组：有序，不可做修改操作，用小括号(x,y,z)的方式表示

字典：无序，可做增删改查操作，其中组成元素为键值对，用花括号\{a:b,c:d\}的方式表示

集合：无序，可由列表创建，其中元素不重复，用花括号\{x,y,z\}的方式表示

英文词频统计：

str='''If I should stay I would only be in your way
    
    So I'll go But I know
    
    I'll think of your every step of the way
    
    And I will always love you Will always love you
    
    You my darling you Bitter-sweet memories
    
    That is all I'm taking with me
    
    So goodbye Please don't cry We both know I'm not
    
    What you need And I will always love you
    
    I will always love you
    
    I hope life treats you kind
    
    And I hope you have all you dreamed of
    
    And I wish you joy and happiness
    
    But above all this Ii wish your love
    
    And I will always love you
    
    I will always love you I will always love you
    
    I will always love you I will always love you
    
    I will always love you Darling I love you
    
    I'll always love you'''
    
    #每个单词的第二个以后都变成小写
    a=str.lower()
    print(a)
    #删除空格
    str=str.lstrip()
    print(str)
    #分隔出一个一个的单词 list
    print("将歌词分隔一个一个的单词为：")
    strlist=str.split()
    print(strlist)
    #统计每个单词出现的次数 dict
    print("统计每个单词出现的次数为：")
    strset=set(strlist)
    for word in strset:
        print(word,strlist.count(word))

![1479630-20181008112616450-878673158.jpg][]

转载于:https://www.cnblogs.com/a1234tt/p/9753047.html

[1479630-20181008104712261-508231204.jpg]: /images/20210724/da1062304c764463b4ace2a6e3d97014.png
[1479630-20181008110145362-934644970.jpg]: /images/20210724/ff47ed94370d4ffb9ebb9b93035f78f5.png
[1479630-20181008112616450-878673158.jpg]: /images/20210724/f73609b16d6041d080dd7aadd037271a.png