Thanks everyone for the responses. - Joe
On Fri, Jun 19, 2009 at 11:09 AM, vince spicer <vinces1...@gmail.com> wrote: > Well* > > *result = [(ListA[i] - ListB[i-1])/ListA[i] for i in range(len(ListA))*if > not ListA[i] == 0*] > > will exclude any results where listA[i] is 0, if you still want these in > the result > you may want to use good'ol for statement instead of list comprehension > > > results = [] > for x in range(len(listA)): > y = ListA[i] - ListB[i-1] > if not ListA[i] == 0: > y = y / ListA[i] > results.append(y) > > print results > > Vince > > > On Fri, Jun 19, 2009 at 8:55 AM, Joe Python <jopyt...@gmail.com> wrote: > >> I have a generator as follows to do list calculations. >> >> *result = [(ListA[i] - ListB[i-1])/ListA[i] for i in range(len(ListA))]* >> >> The above generator, throws '*ZeroDivisionError*' exception if ListA[i] >> = 0. >> Is there a way to say 'Don't divide by ListA[i] if its equal to 0 (within >> that statement)'. >> >> Sorry if this question sounds too stupid. >> >> TIA >> Joe >> >> _______________________________________________ >> Tutor maillist - Tutor@python.org >> http://mail.python.org/mailman/listinfo/tutor >> >> >
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