Paul Moore wrote:
What I'm *not* quite clear on is why Python 3's change to reject
comparisons between unrelated types makes this optimisation possible.
I think the idea was that it's likely to be *useful* a higher
proportion of the time, because Python 3 programmers have to
be careful that the types they're sorting are compatible.
I'm not sure how true that is -- just because you *could*
sort lists containing a random selection of types in Python
2 doesn't necessarily mean it was done often.
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