See https://trac.sagemath.org/ticket/23324 for some discussion.
Am Donnerstag, 25. Juni 2020 19:19:26 UTC+2 schrieb Nils Bruin: > > > > On Thursday, June 25, 2020 at 5:00:23 AM UTC-7, Dima Pasechnik wrote: >> >> >> - the problem is that lists are not hashable, and considered unequal. >> The problem is that in general testing objects for equality is far >> from obvious, might be algorithmically unsolvable, etc. >> >> Why is Set trying then? I can see in the documentation that "Sets with > unhashable objects work, but with less functionality", but as this example > shows, it's more "but with misleading functionality". How is this ever > useful? > > sage: a,b=list(Set([[0],[0]])) > sage: a==b > True > > I don't know if this is ever useful internally (I doubt it; I expect it > mainly makes bugs harder to find), but we should definitely not be exposing > this as user interface, Python's own "frozenset" and "set" are better > behaved. > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/2cc7f9b1-f3e9-4e9d-8f66-8ba93f7d0c8do%40googlegroups.com.
