Python module os.chmod(file, 664) does not change the permission to rw-rw-r— but -w--wx----

Question

Recently I am using Python module os, when I tried to change the permission of a file, I did not get the expected result. For example, I intended to change the permission to

Answer 1

If you have desired permissions saved to string then do

s = '660'
os.chmod(file_path, int(s, base=8))