Dr Mephesto <[EMAIL PROTECTED]> writes: > Hi! > > I would like to create a pretty big list of lists; a list 3,000,000 > long, each entry containing 5 empty lists. My application will append > data each of the 5 sublists, so they will be of varying lengths (so no > arrays!). > > Does anyone know the most efficient way to do this? I have tried: > > list = [[[],[],[],[],[]] for _ in xrange(3000000)] > > but its not soooo fast. Is there a way to do this without looping?
You can do: [[[],[],[],[],[]]] * 3000000 although I don't know if it performs any better than what you already have. -- http://mail.python.org/mailman/listinfo/python-list
