def SQLBridge(command, isQuery=True):
    with fdb.connect(dsn=<Path>, user=<user>, password=<password, charset="UTF8") as con:
    cur = con.cursor()
    cur.execute(command)

    if isQuery:
        result = cur.fetchall()

    else:
        con.commit()
    cur.close()
    con.close()
    return result

SQLBridge("select list(lastcode, ',') from customer where objid in (select customer from saletable)")[0]