ref: 8b6ec7da32b39b2f1af45b6f6dff4cc9e836d5ac
dir: /sys/src/cmd/python/Demo/scripts/makedir.py/
#! /usr/bin/env python
# Like mkdir, but also make intermediate directories if necessary.
# It is not an error if the given directory already exists (as long
# as it is a directory).
# Errors are not treated specially -- you just get a Python exception.
import sys, os
def main():
    for p in sys.argv[1:]:
        makedirs(p)
def makedirs(p):
    if p and not os.path.isdir(p):
        head, tail = os.path.split(p)
        makedirs(head)
        os.mkdir(p, 0777)
if __name__ == "__main__":
    main()