On Fri, Jul 3, 2020, at 03:57, Wes Turner wrote:
Can a Sequence be infinite? If so, an equality test of two nonterminating sequences would be a nonterminating operation.
I think not - an infinite sequence would make len, contains, and reversed ill-defined (it also wouldn't allow certain kinds of slices)
Do Sized and Reversible imply that a sequence terminates? Could __len__ return inf?
__len__ must return an integer.
Perhaps Ordered is a requisite condition
for defining a comparator
for Sequences.
OrderedSequence?
Are there unordered Sequences for which a default __eq__ /
__cmp__
(et. al) would be wrong or inappropriate?
I don't think so [index as a mixin implies being ordered, i think]... the bigger problem is the one I mentioned earlier, that allowing comparison between sequences of different types is inconsistent with tuple and list.