用Python迭代目录 [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。如果我收到一个文件，我必须打开它并更改内容并用自己的行替换。

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.

我尝试过：

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()

但我收到错误。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方式与编码一样。如果用简单的 print 语句替换内部循环的内容，您可以看到每个文件都被找到：

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)

如果您在运行上述操作时仍然收到错误，请提供错误消息。

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

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