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Tue Aug 30 07:12:41 CEST 2005 · https://mail.python.org/pipermail/python-dev/2005-August/055801.html

"Raymond Hettinger" <raymond.hettinger at verizon.net> wrote in
> Yes, there is a precise spec and yes it always returns three strings.

While the find/index discussion was about "what is the best way to indicate 
'cannot answer'", part of the conclusion is that any way can be awkward. 
So I am generally in favor of defining a function, when possible, so that 
it can always deliver an answer (giving inputs of the appropriate types) 
and so that the 'best way' question is moot.  Nicely done.

I think the name 'partition' is fine too.  It does not preclude putting a 
quicksort-type partition function in a module of list functions.  The only 
alternative I can think of is 'tripart', but I do *not* prefer that.

Terry J. Reedy

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[Python-Dev] partition() (was: Remove str.find in 3.0?)