综合练习：英文词频统计

1. 词频统计预处理
2. 下载一首英文的歌词或文章
3. 将所有,.？！’:等分隔符全部替换为空格
4. 将所有大写转换为小写
5. 生成单词列表
6. 生成词频统计
7. 排序
8. 排除语法型词汇，代词、冠词、连词
9. 输出词频最大TOP10

song='''
Trouble will find you no matter where you go, oh oh

No matter if you;re fast, no matter if you;re slow, oh oh

The eye of the storm wanna cry in the morn, oh oh

You;re fine for a while but you start to lose control

He;s there in the dark, he;s there in my heart

He waits in the wings, he;s gotta play a part

Trouble is a friend, yeah trouble is a friend of mine

Ahh..

Trouble is a friend, but trouble is a foe, oh oh

And no matter what I feed him he always seems to grow, oh oh

He sees what I see and he knows what I know, oh oh

So don;t forget as you ease on down my road

He;s there in the dark, he;s there in my heart

He waits in the wings, he;s gotta play a part

Trouble is a friend, yeah trouble is a friend of mine

So don;t be alarmed if he takes you by the arm

I roll down the window, I;m a sucker for his charm

Trouble is a friend, yeah trouble is a friend of mine

Ahh..

How I hate the way he makes me feel

And how I try to make him leave

I try, oh oh I try

He;s there in the dark, he;s there in my heart

He waits in the wings, he;s gotta play a part

Trouble is a friend, yeah trouble is a friend of mine

So don;t be alarmed if he takes you by the arm

I roll down the window, I;m a sucker for his charm

Trouble is a friend, yeah trouble is a friend of mine
'''

song=song.replace(";"," ").replace(","," ").replace("."," ")
song=song.lower()
song=song.split()
dict={}
for key in song:
    dict[key]=song.count(key)
can={'of','be','m','if','and','will','re','but','what','so','how'}
for key in can:
    del dict[key]
dict=sorted(dict.items(),key=lambda e:e[1],reverse=True)
for key in range(10):
    print(dict[key])

运行截图：