无法打开 os.listdir 返回的文件

Question

I have some code like this:

import os
directory = 'H:\\path\\to\\files'
for file in os.listdir( directory ):
  open( os.path.join( directory, file ) )

In a very small number of cases, running this code on a directory will throw the following error.

IOError: [Errno 2] No such file or directory: 'H:\\path\\to\\files\\blahblah.file'

This doesn't happen for every file in the directory - the first few are opened correctly, but then it will fail on one of the files, the same each time.

The files in question do exist, so it's a problem with open rather than with os.listdir .

Strangely, changing the working directory and changing directory to be the corresponding relative path makes a difference to which file we fail on.

I am running Python 2.7 on Windows 10.

Update It seems to be connected to the length of the file names. The file names are very long in general: if I rename the file to something shorter, then it succeeds; longer and it fails again. That might explain why we were failing at different points when using a longer relative path.

Answer 1

This seems to have been caused by the 260-character path length limit . The files that were failing had paths over 260 characters long.