chmod -R in python

rchmod.py

#!/usr/bin/env python
import os

def rchmod(path, dmode, fmode):
    for root, dirs, files in os.walk(path):  
        for _dir in dirs:
            os.chmod(os.path.join(root, _dir), dmode)
        for _file in files:
            os.chmod(os.path.join(root, _file), fmode)

if __name__ == "__main__":
    path = "/tmp/some/stuff"
    fmode = dmode = 0o777
    rchmod(path, dmode, fmode)