def load_db_class(dbtype):
    """
    read subcommand from subcmds directory
    :return: subcommands list
    """
    pkgname = 'datafaker.dbs.' + dbtype + 'db'
    classname = dbtype.capitalize() + 'DB'
    module = __import__(pkgname, fromlist=classname)
    db_class = getattr(module, classname)
    return db_class
