如何防止Python的os.walk跨挂载点移动? [英] How do I prevent Python's os.walk from walking across mount points?

问题描述

在Unix中，所有磁盘都作为主文件系统中的路径公开，因此 os.walk('/')会遍历，例如，/media/cdrom 以及主硬盘，这对于某些应用程序是不希望的.

In Unix all disks are exposed as paths in the main filesystem, so os.walk('/') would traverse, for example, /media/cdrom as well as the primary hard disk, and that is undesirable for some applications.

如何获取驻留在单个设备上的 os.walk ?

How do I get an os.walk that stays on a single device?

相关:

• 推荐答案

  来自 os.walk 文档:

  当topdown为true时，呼叫者可以修改目录名列表(也许使用del或slice赋值)，而walk()仅递归到其子目录名称保留在目录名中；这可以是用于修剪搜索

  When topdown is true, the caller can modify the dirnames list in-place (perhaps using del or slice assignment), and walk() will only recurse into the subdirectories whose names remain in dirnames; this can be used to prune the search

  所以这样的事情应该起作用:

  So something like this should work:

  for root, dirnames, filenames in os.walk(...):
    dirnames[:] = [
      dir for dir in dirnames
      if not os.path.ismount(os.path.join(root, dir))]
    ...
  

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