使用 Python 遍历目录 [英] Iterating through directories with Python

问题描述

我需要遍历给定目录的子目录并搜索文件.如果我得到一个文件，我必须打开它并更改内容并用我自己的行替换它.

I need to iterate through the subdirectories of a given directory and search for files. If I get a file I have to open it and change the content and replace it with my own lines.

我试过了:

import os

rootdir ='C:/Users/sid/Desktop/test'

for subdir, dirs, files in os.walk(rootdir):
    for file in files:
        f=open(file,'r')
        lines=f.readlines()
        f.close()
        f=open(file,'w')
        for line in lines:
            newline = "No you are not"
            f.write(newline)
        f.close()

但是我遇到了错误.我究竟做错了什么?

but I am getting an error. What am I doing wrong?

推荐答案

实际浏览目录的工作与您编写的代码一样.如果用简单的 print 语句替换内循环的内容，您可以看到找到了每个文件:

The actual walk through the directories works as you have coded it. If you replace the contents of the inner loop with a simple print statement you can see that each file is found:

import os
rootdir = 'C:/Users/sid/Desktop/test'

for subdir, dirs, files in os.walk(rootdir):
    for file in files:
        print os.path.join(subdir, file)

如果运行上面还是报错，请提供错误信息.

If you still get errors when running the above, please provide the error message.

针对 Python3 更新

import os
rootdir = 'C:/Users/sid/Desktop/test'

for subdir, dirs, files in os.walk(rootdir):
    for file in files:
        print(os.path.join(subdir, file))

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