util.py

# -*- coding: utf-8 -*-

import os, errno

def mkdir_p(path, mode=0o777):
    """\
    Creates a directory and its parents, if needed.

    NB: If the directory already exists, it does not change its permission.
    """

    try:
        os.makedirs(path, mode)
    except OSError as exc:
        if exc.errno == errno.EEXIST and os.path.isdir(path):
            pass
        else:
            raise