Re: how to convert code that uses cmp to python3

From	Antoon Pardon <antoon.pardon@rece.vub.ac.be>
Newsgroups	comp.lang.python
Subject	Re: how to convert code that uses cmp to python3
Date	2016-04-08 09:45 +0200
Message-ID	<mailman.71.1460101559.2253.python-list@python.org> (permalink)
References	<57064D0D.1030701@rece.vub.ac.be> <CAPTjJmrGiQS9uhFU-+TQ4nUWQ2p4gmJoQitMotS0Ob--qm1iWg@mail.gmail.com> <5706C961.2000009@rece.vub.ac.be> <85wpo95dpo.fsf@benfinney.id.au> <570761B2.3060800@rece.vub.ac.be>

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Op 07-04-16 om 23:08 schreef Ben Finney:
> Antoon Pardon <antoon.pardon@rece.vub.ac.be> writes:
>
>> With this method I have to traverse the two tuples almost always
>> twice. Once to find out if they are equal and if not a second time to
>> find out which is greater.
> You are essentially describing the new internal API of comparison
> operators. That's pretty much unavoidable.

And nobody thought about this kind of cases or found them important enough?

> If you want to avoid repeating an expensive operation – the computation
> of the comparison value for an object – you could add an LRU cache to
> that function. See ‘functools.lru_cache’.

I'll have a look.

-- 
Antoon

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Re: how to convert code that uses cmp to python3 Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-04-08 09:45 +0200
  Re: how to convert code that uses cmp to python3 Steven D'Aprano <steve@pearwood.info> - 2016-04-08 22:07 +1000
    Re: how to convert code that uses cmp to python3 Marko Rauhamaa <marko@pacujo.net> - 2016-04-08 15:52 +0300

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