def create_dir(dst):
    """create directory if necessary

    :param dst: 
    """
    directory = os.path.dirname(dst)
    if directory and not os.path.exists(directory):
        os.makedirs(directory)
def create_dir ( dst ) : directory = os . path . dirname ( dst ) if directory and not os . path . exists ( directory ) : os . makedirs ( directory )
create directory if necessary

    :param dst: