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Showing content from http://mail.python.org/pipermail/python-dev/2009-April/088980.html below:

[Python-Dev] Tuples and underorderable types

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> I'm wondering if there is something we can do to mitigate
> the issue in a general way.  It bites that the venerable technique
> of tuple sorting has lost some of its mojo.  This may be
> an unintended consequence of eliminating default comparisons.

I would discourage use of the decorate/sort/undecorate pattern,
and encourage use of the key= argument. Or, if you really need
to decorate into a tuple, still pass a key= argument.

Regards,
Martin

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