import os
import os. path
os. path. exists("E: MpythonProject|\data.txt")##X os. path. exists("E:\\pythonProject\\datal.txt")＃判断文件是os.path.basename(E:\\pythonProject\\data.txt")＃返回指定路os.path.isfile(E:\\pythonProject\\data.txt")＃判断是否为文os. remove(E:\\pythonProject\\data.txt")# 删除指定文件os.listdir(E:pythonProject")

os . path . split ( E : WpythonProject Wdata . txt )# Wiz # os . path . dirname ( E : pythonProject \(\ datatxt )## i
= os . path 模块常用文件操作方法2
import os
import os . path
os . path . exists (" E : ApythonPro . ject \\ data . txt ")＝判断文作是： os . path . exists ( E : pythonProject \' datal , txt ")＃判断文件是 os . path . basename ( E : pythonProjectyadata . txt )= Saint ) os . path , istlie C : sApythonProjectyidats . txt "),"的瞧是否为文 os . removel Et pythonProject / Vdata .txt7) e Rir :／指定文件 os . listbir El
onfrojece s
s Cane 历关下的所有文

import re
＃任务实现
# 1．读取数据
with open(walden.txt',"r)as f##
txt = f. read()
网页链接 #2．去除多余符号
lyric= txt. lower 0
＃将大写字母转换成小写形式
lyric_new = re. sub('[,.:"\'?\n:-]','',lyrie)＃去除多余的标点符号
#3．单词分割
words = lyric_new. split()
# 4．词频统计
word_freq = 0}
for word in words:
word_freq[word] = word_freq, get(word, 0) +1
# 5．排序
result =sorted(word_freq.items(),key=1ambda x: x[1],reverse True)
#6、写出结果
result_string = str(result)：将结果转换成字符串形式
with open(word_freq,txt',mode='w')an f:
f.write(result_string)