is it right that there is no "do .... loop until"-construct in python ? if yes, why ? i know you can simulate such a loop with a "while ..."-construct. yours, uwe -- Uwe.Schmitt at num.uni-sb.de Universität des Saarlandes phone: +49 (0)681/302-2468 Geb. 36.1, Zi. 4.17, PF 151150 D-66041 Saarbrücken http://www.rocksport.de