python按行读取文件,如何去掉换行符"\n"

for line in file.readlines():
line=line.strip('\n')

python没有substr,但可以用slice

s = line[11:22]

遍历文件夹。os.walk()返回一个三元素的tuple:当前路径、子文件夹名称、文件列表。

import os
def fun( path ):
for root, dirs, files in os.walk( path ):
for fn in files:
print root, fn

  

  

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