Create directory if necessary

mkdir.py

def mkdir_p(directory):
    """Create a directory if necessary"""
    # Thread safe
    import os
    try:
        os.makedirs(directory)
    except OSError:
        pass


def mkdir_p_for(fname):
    """Create a directory for a file if necessary"""
    import os
    dirname = os.path.dirname(fname)
    if dirname != '':
        mkdir_p(dirname)