Hendrik van Rooyen wrote: > From a practical point of view, the only reason to use a tuple instead > of a list for anything seems to be that you want to use it as a key in a > dict... > > Otherwise, why bother with these recalcitrant things that you can't > change or index, or append to or anything that lists allow?
I can imagine (but don't know whether this is actually the case in CPython) that tuples have some memory and/or performance advantages over lists, and there could be special optimizations for small (2 or 3 element) tuples because they are used very frequently. So that would be another practical aspect why a long list of tuples could be better than a long list of lists - but does anybody know whether this is even true for CPython? -- Christoph -- http://mail.python.org/mailman/listinfo/python-list
