Hey I didn't notice that :P Thanks to Alan, I learn something new with the use of List Comprehension and thanks to Danny for the docs, they really helped a lot to understand the figure here I think I can say that Minesweeper implementing 23% with this problem solved
Thanks a lot Alberto >From: "Alan G" <[EMAIL PROTECTED]> >To: "Alberto Troiano" <[EMAIL PROTECTED]>, <tutor@python.org> >Subject: Re: [Tutor] Minesweeper implementing 20%,weird problem with >matrixes >Date: Thu, 14 Jul 2005 01:12:18 +0100 > > > I initialize them by putting None along all the fields > >Actually you don't. > > def initialize(self): > self.buttonmatrix=[] > self.statematrix=[] > self.bombmatrix=[] > >3 empty lists, so far so good. > > for i in range(self.fil): > aux=[] > for j in range(self.col): > aux.append(None) > >a new list filled with None > > self.buttonmatrix.append(aux) > self.bombmatrix.append(aux) > self.statematrix.append(aux) > >THat same list inserted into all three lists, so they all point >at the same internal list of Nones. So when you change one, >you change all. > >Try using aux[:] instead to take a copy of aux... >You could also use list comprehension instead of the loop/append: > >aux = [None for i in range(self.col)] > > >HTH, > >Alan G. >_______________________________________________ >Tutor maillist - Tutor@python.org >http://mail.python.org/mailman/listinfo/tutor _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
