Document for 3.10 version seems auto convert 0o777 to 511. And it's correct for 3.9

(May be due to new version of Sphinx? Seems source code for docs are correct.)

[img]https://i.imgur.com/ByWSJ6A.png[/img]
[img]https://i.imgur.com/rK0romC.png[/img]
[img]https://i.imgur.com/WXYMcrT.png[/img]
[img]https://i.imgur.com/W5YskgQ.png[/img]

It may misleading user. If we use os.mkdir(mode=511), it's not equal to use os.mkdir(mode=0o777)

The conversions from 0o777 to 511 in 3.10 and 3.11 but not in 3.9 are these:

https://docs.python.org/3/library/pathlib.html#pathlib.Path.mkdir
  Path.mkdir(mode=511, parents=False, exist_ok=False)

https://docs.python.org/3/library/os.html#os.mkdir
  os.mkdir(path, mode=511, *, dir_fd=None)

I don't know whether different sphinx versions are used for different versions of the docs.

I found out that this issue can be fixed by set ``autodoc_preserve_defaults`` to True [(From sphinx-doc)](https://www.sphinx-doc.org/en/master/usage/extensions/autodoc.html#confval-autodoc_preserve_defaults)

On the other hand. I test ``Path.mkdir(mode=511)`` on my mac. It's the same as ``Path.mkdir(mode=0o77)``

But it's not the same on my company's dev linux server.

I will double check this part on Monday.

Octal 777 is really the same as decimal 511.
If you are calling mkdir and looking at the permissions on the created directory, you may think the mode is wrong because of umask (default permission bitmask that’s applied to the mode).  But the numbers are really equivalent, we are only talking about a doc presentation issue here, not any problem in code.