Thanks for the assistance. I actually realized I was making things more complicated than they needed to be and I really only needed one condition to be met.
On Jan 6, 7:42 pm, Ned Deily <n...@acm.org> wrote: > In article > <40a44d6b-c638-464d-b166-ef66496a0...@l16g2000yqo.googlegroups.com>, > > > > "bowman.jos...@gmail.com" <bowman.jos...@gmail.com> wrote: > > Hi, > > > I'm trying to write a multi-conditional while statement, and am having > > problems. I've broken it down to this simple demo. > > > #!/usr/bin/python2.5 > > > condition1 = False > > condition2 = False > > > while not condition1 and not condition2: > > print 'conditions met' > > if condition1: > > condition2 = True > > condition1 = True > > > As I understand it, this should print 'conditions met' twice, however, > > it only prints it once. It seems that once condition1 is made true, > > the whole thing evaluates as true and stops the while loop. > > Are you perhaps expecting that the "while" condition is tested at the > end of the loop? It's not; it is tested at the top of the loop, so, > once the condition evaluates as false, the loop exits. This can even > result in zero trips: > > >>> while False: > > ... print "never" > ... > > > > Unwinding the snippet above: > > >>> condition1 = False > >>> condition2 = False > >>> not condition1 and not condition2 > True > >>> if condition1: > > ... condition2 = True > ...>>> condition1 = True > >>> not condition1 and not condition2 > > False > > # -> while loop exits after 1 trip > > -- > Ned Deily, > n...@acm.org -- http://mail.python.org/mailman/listinfo/python-list
