On Wed, Aug 9, 2017 at 8:38 PM, Marko Rauhamaa <ma...@pacujo.net> wrote: > Chris Angelico <ros...@gmail.com>: > >> On Wed, Aug 9, 2017 at 7:51 PM, Marko Rauhamaa <ma...@pacujo.net> wrote: >>> Mutable objects can be used as keys into a dictionary. >> >> Only when the objects' mutability does not affect their values. > > Up to equality. The objects can carry all kinds of mutable payload as > long as __hash__() and __eq__() don't change with it.
Which means that its value won't change. That's what I said. Two things will be equal regardless of that metadata. > And Python doesn't enforce this in any way except for lists. That's > somewhat unfortunate since sometimes you really would like an immutable > (or rather, no-longer-mutable) list to act as a key. Then make a tuple out of it. Job done. You're trying to say that its value won't now change. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
