Explanation on mode in pathlib.Path.chmod(mode) [duplicate]

Question

May I know how to define the mode in pathlib.Path.chmod(mode). I did not find any explanation or explanation links on how to define mode in python 3.6 documentation. E.g.

>>> p = Path( 'filename.ext' )
>>> p.stat().st_mode
33204

What is the meaning of the five digits either individually or together? I would like to change the value to so that Owner has execute permission. How do I work out the values to use for mode?

Alternative Solution:

I like to thank @falsetru for his answer and comments. Also, I like to share a non mathematical approach to find the "mode value" of a desired permission level that can be submitted to a pathlib.Path.chmod(mode) command.

Here are the Steps:

1. Decide on the permission levels you want for the file.
2. Use a file manager (e.g. nautilus) to select the file, then right-click on it, click on "Properties" followed by left-clicking on the "Permission" Tab. Here you can set the desired permission levels for the file.
3. Next, from a Python interpreter, submit the above mentioned commands. It will return the corresponding mode value for the permission level you want. You can then use that in pathlib.Path.chmod(mode) command.

Answer 1

If you follow the link (os.chmod), you will know each bit means.

By converting the mode value to octal representation, it would be easier to read:

>>> oct(33204)
'0o100664'

• regular file: 0o100000 (33204 & S_IFREG -> non-zero OR S_ISREG(33204) -> True) S_IFREG, S_ISREG
• read-writable by owner: 0o000600 (rw-)
• read-writable by group: 0o000060 (rw-)
• readable by other: 0o000004 (r--)

UPDATE:

stat.filemode converts the number into a human readable format:

>>> stat.filemode(33204)
'-rw-rw-r--'