> Basically it's not evaluating it the way you think it is: > >Your first example really equates to: > > if (1 or 5) in rollList:
Not quite, its doing: if 1 or 5 in rollList: We can demonstrate that with: >>> if 1 or 0 in [6,2,3]: print 'True' ... True >>> if (1or 0) in [6,2,3]: print 'True' ... >>> Here the first expression evaluates to True and never attempts the 'in' comparison (which would fail). The second uses your parenthesis style and evaluates to 1 in [6,2,3] which is False A minor nit pick. Alan G Author of the learn to program web tutor http://www.freenetpages.co.uk/hp/alan.gauld On 4/26/06, John Connors <[EMAIL PROTECTED]> wrote: > > G'day, > > I found something today that has me confused. I'm making a list of 6 > random > dice rolls and I want to check if any 1's or 5's were rolled. I tried this > way first and it returns true even if there are no 1's or 5's. I'll use a > roll of all 2's as an example. > > rollList = [2,2,2,2,2,2] > if 1 or 5 in rollList: > print 'yes' > else: > print 'no' > > Then I tried this and it works fine. > > rollList = [2,2,2,2,2,2] > if 1 in rollList or 5 in rollList: > print 'yes' > else: > print 'no' > > It doesn't really matter because the second way does what I want but I > would > like to know why the first way doesn't work and if the syntax is wrong why > doesn't it return an error. > > John > > PS I apologise if this is a duplicate, hotmail did some kind of spam check > when I tried to send it, I've waited 30 mins and I don't think it went the > 1st time so I'll post it again. > > _________________________________________________________________ > New year, new job – there's more than 100,00 jobs at SEEK > > http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fninemsn%2Eseek%2Ecom%2Eau&_t=752315885&_r=Jan05_tagline&_m=EXT > > > > _______________________________________________ > Tutor maillist - [email protected] > http://mail.python.org/mailman/listinfo/tutor > > > _______________________________________________ Tutor maillist - [email protected] http://mail.python.org/mailman/listinfo/tutor
