英文词频统计预备，组合数据类型练习

1、实例: 下载一首英文的歌词或文章，将所有,.？！等替换为空格，将所有大写转换为小写，统计某几个单词出现的次数，分隔出一个一个的单词。

song='''Hello, how are you?
It's so typical of me to talk about myself
I'm sorry, I hope that you're well
Did you ever make it out of that town
Where nothing ever happened?
Hello, from the other side
I must've called a thousand times to tell you
I'm sorry, for everything that I've done
But when I call you never seem to be home'''
song=song.lower()
print(song)

for i in song:
song1=song.replace(',',' ')
song2=song1.replace('?',' ')
print(song2)

songs=song2.split(' ')
print(songs)

print(songs.count('hello'))
print(songs.count('you'))

  

2、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。

 

grade=list('13231313212212312')

grade.append('3')

grade.pop()

grade[3]='1'

print(grade[5])

for i in range (len(grade)):
grade[i]=int(grade[i])

for i in range (len(grade)):
if grade[i]==2:
print(i)
break

print('1分的同学有{0}个'.format(grade.count(1)))
print('3分的同学有{0}个'.format(grade.count(3)))

 

3、简要描述列表与元组的异同。

元组和列表十分类似，只不过元组和字符串一样是不可变的即你不能修改元组；而列表是可以修改的。

 

转载于:https://www.cnblogs.com/silu666-666/p/7562086.html