io_handling.py 文件源码

def _ensure_dir_exists(filename):
    # type: (str) -> None
    """Creates a directory tree if it does not already exist.

    :param str filename: Full path to file in destination directory
    """
    dest_final_dir = filename.rsplit(os.sep, 1)[0]
    if dest_final_dir == filename:
        # File is in current directory
        _LOGGER.debug('Target dir is current dir')
        return
    try:
        os.makedirs(dest_final_dir)
    except _file_exists_error():
        # os.makedirs(... exist_ok=True) does not work in 2.7
        pass
    else:
        _LOGGER.info('Created directory: %s', dest_final_dir)