[EMAIL PROTECTED] wrote: > Paul Rubin wrote: > > [EMAIL PROTECTED] writes: > > > print sum( ([i]*n for i,n in enumerate(seq)), []) > > > > Wow, I had no idea you could do that. After all the discussion about > > summing strings, I'm astonished. > > Me too ... despite what bearophile said, this is faster than the 2nd > example. Nearly as fast as the original loop :)
See if it's still faster if the original sequence is length 1000. (Hint: it won't be.) Adding lists with sum has the same performance drawback that adding strings does, so it should be avoided. sum is for adding numbers; please stick to using it that way. FWIW, the original loop looked perfectly fine and readable and I'd suggest going with that over these hacked-up listcomp solutions. Don't use a listcomp just for the sake of using a listcomp. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
