Marko Rauhamaa <ma...@pacujo.net> writes: > Ben Finney <ben+pyt...@benfinney.id.au>: > > > No. I'm telling you that ‘is’ is *wrong* for comparing strings, > > because it is unreliable. > > No, it isn't as long as the string object references have a common > assignment "pedigree." Assignment (including parameter passing) is > guaranteed to preserve identity of any object.
The unreliability isn't “will the same object have the same identity?”. The unreliability is “will objects defined elsewhere have a different identity?” In the case of Python strings, the latter question is not reliably answerable from the programmer's perspective. You are obstinately ignoring the point that the identity of a string is *not* guaranteed to be different from a string with the same value. Since you're persistently misconstruing what is being said to you, I'm not going to run through it all again. -- \ “[W]e are still the first generation of users, and for all that | `\ we may have invented the net, we still don't really get it.” | _o__) —Douglas Adams | Ben Finney -- https://mail.python.org/mailman/listinfo/python-list
