Il giorno venerdì 26 novembre 2021 alle 10:23:46 UTC+1 Frank Millman ha scritto: > Hi all > > In my program I have a for-loop like this - > > >>> for item in x[:-y]: > ... [do stuff] > > 'y' may or may not be 0. If it is 0 I want to process the entire list > 'x', but of course -0 equals 0, so it returns an empty list. > > In theory I can say > > >>> for item in x[:-y] if y else x: > ... [do stuff] > > But in my actual program, both x and y are fairly long expressions, so > the result is pretty ugly. > > Are there any other techniques anyone can suggest, or is the only > alternative to use if...then...else to cater for y = 0? > > Thanks > > Frank Millman
First assign your long expressions to variables x and y and then you may write: for item in x[:len(x) - y]: ... -- https://mail.python.org/mailman/listinfo/python-list
