On 26/01/2010 12:22, Nick Coghlan wrote:
Lennart Regebro wrote:
It never gets to that root comparison, as several of that types
comparisons just refer back to the type who returns NotImplemented. To
solve it you need to never refer to the other type in your
comparisons. And as far as I see that makes it impossible to implement
full comparisons with only one operator implemented.
Ah, OK, I'd missed the complication where the translations could reverse
the order of the arguments.
I'd suggest two things: putting comments on the recipes pointing out
they're vulnerable to infinite recursion if mixed with other types and
raising an issue on the tracker pointing back to this thread.
Note that the mail archives for this list are corrupted and not being
updated [1], so any link will need to be to gmane (or equivalent) rather
than the usual archive on mail.python.org.
All the best,
Michael
[1] http://mail.python.org/pipermail/python-dev/2010-January/thread.html
Cheers,
Nick.
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