martin v löwis qpnyslvloewisde unless misinterpreting sounds like burden proof falls option keep status quo thing seems outside observer look situation might ask names changed current behavior functional one clamoring change think fairly obvious 2x keys change wasteful actually build list keys dictionary even values create tuples well want iterate common operation keys iterate look right applications take snapshot keys rare right even uncommon applications take snapshot keys continue changing dictionary yet uncommon cases save snapshot keys change dictionary break ie fail function correctly snapshot gets silently updated disagree still dont understand motivation pep current motivation able set operations keys items without copy appear pertain issue names correspond behavior direct name used common scenario loop ie people dont think issue likely right thing 2x case regards martin _______________________________________________ python3000 mailing list smsbmo9552pythonorg httpmailpythonorgmailmanlistinfopython3000 unsubscribe httpmailpythonorgmailmanoptionspython3000python300040tangomucom thu 07 aug 2008 070556 0200 python3000 spooky behavior dictitems friends