mattia wrote: > Il Thu, 05 Mar 2009 10:46:58 +0100, Peter Otten ha scritto: > >> mattia wrote: >> >>>> Note how get_roulette_wheel() is now completeley independent of the >>>> concrete problem you are using it for. >>> >>> Ok, but also a lot more memory consuming ;-) >> >> I don't think so. Python references objects; therefore the list >> >> [tiny_little_thing]*N >> >> does not consume more memory than
Oops, should have been less. >> >> [big_fat_beast]*N >> >> Or did you have something else in mind? >> >> Peter > > Ok, understood. So if I have e.g. [[200 elements]]*N, then I'll have N > pointers to the same location of my seq, right? Right. You can verify this with >>> v = [0] >>> items = [v]*5 >>> v[0] = 42 >>> items [[42], [42], [42], [42], [42]] which often surprises newbies. Peter -- http://mail.python.org/mailman/listinfo/python-list