英语词频统计

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

代码：

# -*- coding:utf-8 -*-

song = '''
Nobody ever knows
Nobody ever sees
I left my soul
Back then no I'm too weak
Most nights I pray for you to come home
Praying to the lord
Praying for my soul
Now please don't go
Most nights I hardly sleep when I'm alone
Now please don't go oh no
I think of you whenever I'm alone
So please don't go

Cause I don't ever wanna know
Don't ever want to see things change
Cause when I'm living on my own
I wanna take it back and start again
Most nights I pray for you to come home
I'm praying to the lord
I'm praying for my soul
Now please don't go
Most nights I hardly sleep
When I'm alone
Now please don't go oh no
I think of you whenever I'm alone
So please don't go
I sent so many messages
You don't reply
Gotta feel around what am I missing babe
Singing now oh oh oh
I need you now I need your love oh
Now please don't go
I said most nights I hardly sleep
When I'm alone
Now please don't go oh no
I think of you whenever I'm alone
So please don't go
So please don't go
So please don't go
Oh no
I think of you whenever I'm alone
So please don't go
 '''

symbol = list(''',.？！’:"“”-%$''')
for i in symbol:
    song = song.replace(i, ' ')
song = song.lower()
split = song.split()
word = {}
for i in split:
    count = song.count(i)
    word[i] = count
words = '''
a an the in on to at and of is was are were i he she you your they us their our it or for be too do no 
that s so as but it's
'''

prep = words.split()
for i in prep:
    # 判断单词是否在字典中
    if i in word.keys():
        del(word[i])
word = sorted(word.items(), key=lambda item: item[1], reverse=True)
for i in range(10):
    print(word[i])