On Mon, Sep 27, 2010 at 1:54 PM, Alex Hall <mehg...@gmail.com> wrote: > Hi again everyone, > I have a 2d array (I guess it is technically a list) which I want to > fill with zeros. Later I will change some values, but any I do not > change have to be zeros. I have two complex for loops, but I tried to > scale things down to a couple list comprehensions and I broke things. > What is wrong with the following line? > self.am=[[(a,b) for a in range(len(self.lines)) a=0] for b in > range(len(self.lines)) b=0] > > self.lines is another array that tells self.am how big to get, but no > matter the size, all created cells of the self.am 2d array should end > up with a value of 0. I barely understand list comprehensions as it is > so am not sure what I did wrong here. I adapted this from a working > example that fills a 2d array with numbers. > > -- > Have a great day, > Alex (msg sent from GMail website) > mehg...@gmail.com; http://www.facebook.com/mehgcap > _______________________________________________ > Tutor maillist - tu...@python.org > To unsubscribe or change subscription options: > http://mail.python.org/mailman/listinfo/tutor >
I don't know how you are figuring out your size, but if you note below, you can create a list with one element value 0, then multiply it by length you need and result is than length of array filled with 0s x = [0] * 4 >>> x [0, 0, 0, 0] -- Joel Goldstick _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
