Frank Millman <fr...@chagford.com> writes: > 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?
If you put it in a function with x and y as parameters, then both x and y are just a simple identifier inside the function. And then you can then even eliminate the if with for item in x[:len(x)-y]: -- Pieter van Oostrum <pie...@vanoostrum.org> www: http://pieter.vanoostrum.org/ PGP key: [8DAE142BE17999C4] -- https://mail.python.org/mailman/listinfo/python-list
