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This code raised exception when I tried to create a sub dir ./test/123 under ./test/. And after examine the permission, I found that dir ./test created by this code has d-w----r--, which is strange...If I mkdir in the terminal, that dir will have drwxr-xr-x permission.

from pathlib import Path
if __name__ == '__main__':
    p1 = Path('./test')
    p1.mkdir(644, parents=True, exist_ok=True)

    p2 = Path('./test/123')
    p2.mkdir(644, parents=True, exist_ok=True)


  File "/usr/local/Cellar/python/3.7.4/Frameworks/Python.framework/Versions/3.7/lib/python3.7/pathlib.py", line 1267, in mkdir
    if not exist_ok or not self.is_dir():
  File "/usr/local/Cellar/python/3.7.4/Frameworks/Python.framework/Versions/3.7/lib/python3.7/pathlib.py", line 1358, in is_dir
    return S_ISDIR(self.stat().st_mode)
  File "/usr/local/Cellar/python/3.7.4/Frameworks/Python.framework/Versions/3.7/lib/python3.7/pathlib.py", line 1168, in stat
    return self._accessor.stat(self)
PermissionError: [Errno 13] Permission denied: 'test/123'
Ziqi Liu
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1 Answers1

6

Pathlib expects an octal integer instead of decimal. You can denote octal by preficing your mode bits 644 with 0o, i.e. 0o644. 644 decimal translates to 1204 in octal which imposes permissions you are seeing there.

Also, to traverse a directory structure you require both read and execute permissions on it, so I would recommend using 0o755 instead of 0o644.

The Unix command line chmod assumes octal whereas your python pathlib library does not. Hope this helps.

Colin Garvey
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