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。

bad='''your butt is mine

I Gonna tell you right 

Just show your face 

In broad daylight 

I'm telling you 

On how I feel

Gonna Hurt Your Mind 

Don't shoot to kill 

Shamone 

Shamone 

Lay it on me 

All right

I'm giving you 

On count of three 

To show your stuff 

Or let it be

I'm telling you 

Just watch your mouth
I know your game 

What you're about 

Well they say the sky's the limit 

And to me that's really true 

But my friend you have seen nothin' 

Just wait till I get through 

Because I'm bad,I'm bad 

shamone

(Bad,bad,really,really bad)

You know I'm bad,I'm bad

(Bad,bad,really,really bad)

You know it 

You know I'm bad,I'm bad

Come on,you know 

(Bad,bad,really,really bad)

And the whole world 

Has to answer right now 

Just to tell you once again 

Who's bad 

The word is out 

You're doin' wrong 

Gonna lock you up 

Before too long 

Your lyin' eyes 

Gonna tell you right 

So listen up 

Don't make a fight 

Your talk is cheap 

You're not a man 

Your throwin' stones 

To hide your hands 

Well they say the sky's the limit 

And to me that's really true 

But my friend you have seen nothin' 

Just wait till I get through 

Because I'm bad,I'm bad 

shamone

(Bad,bad,really,really bad)

You know I'm bad,I'm bad

(Bad,bad,really,really bad)

You know it 

You know I'm bad,I'm bad

Come on,you know 

(Bad,bad,really,really bad)

And the whole world 

Has to answer right now 

Just to tell you once again 

Who's bad 

We could change the world tomorrow 

This could be a better place 

If you don't like what I'm sayin' 

Then won't you slap my face 

Because I'm bad'''

bad=bad.lower()
for i in ",.?!":
    bad=bad.replace(i,' ')
bad=bad.replace('
',' ')
words=bad.split(' ')
print(words)
print("bad出现的次数为:"+str(words.count("bad")))
print("you出现的次数为:"+str(words.count("you")))

运行结果为：

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。

score=list('13213212132132132')
print(score)
for i in range(len(score)):
    score[i-1]=int(score[i-1])
for i in range(len(score)):
    if(score[i-1]==3):
        print("第一个3分的下标为:"+str(i-1))
        break
print("得2分的同学有"+str(score.count(2))+"个")

print("删除列表下标为6的值")
score.pop(6)
print(score)

print("追加一个值“4”")
score.append(4)
print(score)

print("在列表下标第1位插入一个7")
score.insert(1,7)
print(score)

运行结果为：

3.简要描述列表与元组的异同。

答：列表与元组很想象。不同的是列表里的数据可以更改，而元组无法进行修改。