easy to forget until it matters… increasingly better
#that list comprehension that just pops into your head
[x for x in xrange(1, 1000) ]
#lazy - some would say unpythonic
map(lambda x: x*2, xrange(1,1000))
#lazy (generators, yeah!)
(x*2 for x in xrange(1, 1000) )
where is that hidden wall floating around…
e.g. http://stackoverflow.com/questions/855191/how-big-can-a-python-array-get/855455#855455 Therefore the maximum size of a python list on a 32 bit system is 536,870,912 elements