组合数据类型练习，英文词频统计实例9-21

• 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。

  >>>score=list('21223113321')
  >>>print('作业评分列表:',score)
  >>>score.append('3')
  >>>print('增加：',score)
  >>>score.pop()
  >>>print('删除：',score)
  >>>score.insert(2,'1')
  >>>print('插入：',score)
  >>>score[2]='2'
  >>>print('修改：',score)
  >>>print('第一个3分的下标：',score.index('3'))
  >>>print('1分的个数：',score.count('1'))
  >>>print('3分的个数：',score.count('3'))

  

• 2、字典实例：建立学生学号成绩字典，做增删改查遍历操作。

  >>>d={'洪英杰':93,'郭子维':74,'王五':45,'徐均钧':66}
  >>>print('学生成绩字典：',d)
  >>>d['钱二']=92
  >>>print('增加：',d)
  >>>d.pop('徐均钧')
  >>>print('删除：',d)
  >>>d['张三']=73
  >>>print('修改：',d)
  >>>print('查询李四成绩：',d.get('李四','无'))

  

• 3、列表，元组，字典，集合的遍历。

  >>>ls=list("4613125646")
  >>>tu=tuple("4613125646")
  >>>s=set("4613125646")
  >>>d={'洪英杰':93,'郭子维':74,'王五':45,'徐均钧':66}
  >>>print("列表：",ls)
  >>>for i in ls:
      print(i,end=' ')
  >>>print("\n")
  >>>print("元组：",tu)
  >>>for i in tu:
      print(i,end=' ')
  >>>print("\n")
  >>>print("集合：",s)
  >>>for i in s:
      print(i,end=' ')
  >>>print("\n")
  >>>print("字典：",d)
  >>>for i in d:
      print(i,end='\t')
  >>>print(d[i],end='\n')

  
  
• 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)
  
  

  • faded = '''You were the shadow to my light
    Did you feel us?
    Another start
    You fade away
    Afraid our aim is out of sight
    Wanna see us
    Alive
    Where are you now?
    Where are you now?
    Where are you now?
    Was it all in my fantasy?
    Where are you now?
    Were you only imaginary?
    Where are you now?
    Atlantis
    Under the sea
    Under the sea
    Where are you now?
    Another dream
    The monster's running wild inside of me
    I'm faded
    I'm faded
    So lost, I'm faded
    I'm faded
    So lost, I'm faded
    These shallow waters never met what I needed
    I'm letting go a deeper dive
    Eternal silence of the sea. I'm breathing alive
    Where are you now?
    Where are you now?
    Under the bright but faded lights
    You've set my heart on fire
    Where are you now?
    Where are you now?
    Where are you now?
    Atlantis
    Under the sea
    Under the sea
    Where are you now?
    Another dream
    The monster's running wild inside of me
    I'm faded
    I'm faded
    So lost, I'm faded
    I'm faded
    So lost, I'm faded'''
    
    faded = faded.lower()
    for i in '?!,.\'\n':
        faded = faded.replace(i,' ')
    words = faded.split(' ')
    
    dic={}
    keys = set(words)
    for i in keys:
        dic[i]=words.count(i)
    
    c = list(dic.items())
    c.sort(key=lambda x:x[1],reverse=True)
    
    for i in range(10):
        print(c[i])

    

  • 建立学生学号成绩字典

    >>>score = {10:'41',
                 20:'64',
                 30:'71',
                 40:'81',
                 50:'91'
                }
    >>>print(score)
    >>>score[6] = '90'
    >>>print(score)
    >>>score.pop(6)
    >>>print(score)
     
    >>>for i in score:
        print("{:>2} : {:<2}".format(i,score.get(i)))

    

    列表，元组，字典，集合

    >>>ls=list("4613125646")
    >>>tu=tuple("4613125646")
    >>>se=set("4613125646")
    >>>d={'阿一':93,'阿二':74,'阿三':45,'阿四':66}
    >>>print("列表：",ls)
    >>>for i in ls:
        print(i,end=' ')
    >>>print("\n")
    >>>print("元组：",tu)
    >>>for i in tu:
        print(i,end=' ')
    >>>print("\n")
    >>>print("集合：",se)
    >>>for i in se:
        print(i,end=' ')
    >>>print("\n")
    >>>print("字典：",d)
    >>>for i in d:
        print(i,end='\t')
        print(d[i],end='\n')

    

    歌词统计

    >>>song = '''Vincent,Don McLean. Starry starry night
     paint your palette blue and grey
     look out on a summer\'s day
     with eyes that know the darkness in my soul.
     Shadows on the hills
     sketch the trees and the daffodils
     catch the breeze and the winter chills
     in colors on the snowy linen land.
     And now I understand
     what you tried to say to me
     and how you suffered for your sanity
     and how you tried to set them free.
     They would not listen they did not know how
     perhaps they\'ll listen now.
     Starry starry night
     flaming flowers that brightly blaze
     swirling clouds in violet haze
     reflect in Vincent\'s eyes of China blue.
     Colors changing hue
     morning fields of amber grain
     weathered faces lined in pain
     are smoothed beneath the artist\'s loving hand.
     And now I understand
     what you tried to say to me
     and how you suffered for your sanity
     and how you tried to set them free.
     They would not listen they did not know how
     perhaps they\'ll listen now.
     For they could not love you
     but still your love was true
     and when no hope was left in sight on that
     starry starry night.
     You took your life as lovers often do,
     But I could have told you Vincent
     this world was never meant for one as beautiful as you.
     Starry starry night
     portraits hung in empty halls
     frameless heads on nameless walls
     with eyes that watch the world and can\'t forget.
     Like the stranger that you\'ve met
     the ragged men in ragged clothes
     the silver thorn of bloddy rose
     lie crushed and broken on the virgin snow.
     And now I think I know
     what you tried to say to me
     and how you suffered for your sanity
     and how you tried to set them free.
     They would not listen they\'re not listening still
     perhaps they never will.'''
     
    >>>song = song.lower()
    >>>for i in '?!,.\'\n':
    >>> song = song.replace(i,' ')
    >>>words = song.split(' ')
     
    >>>dic={}
    >>>keys = set(words)
    >>>for i in keys:
    >>>dic[i]=words.count(i)
     
    >>>c = list(dic.items())
    >>>c.sort(key=lambda x:x[1],reverse=True)
     
    >>>for i in range(10):
        >>>print(c[i])