alex goretoy wrote: > Hello All, > > I'm doing this in my code > > [[v.append(j) for j in i] for i in self.value] > > if works and all, but I need to add a if statement in the mix. Can't > seem to remember the syntax to do so and everything I've tried seems to > fail. How do I add a check to see if j is not int("0") then append to v > list? Thank you in advance. -A
Who, tiger. It "works" for a value of "works" that involves creating two lists. One is the one you want, referenced by v, and the other is the value if the list comprehension, which will be a list full of lists of all the None values returned by those append() calls. But I presume you are throwing that second list away ... See, a list comprehension is intended to create a list. So what you should have used (assuming v was the empty list before you started) was v = [[j for j in i] for i in self.value] Further, when you say 'j is not int("0")', do you actually mean that a is not in integer with the value 0? Assuming you do then what you need is v = [[j for j in i if not j] for i in self.value] or, more pedantically v = [[j for j in i if j==0] for i in self.value] regards Steve -- Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list