[Python-Dev] What if we didn't have repr?
Guido van Rossum
guido at python.org
Tue May 21 15:36:54 CEST 2013
Actually changing __str__ or __repr__ is out of the question, best we can
do is discourage makingbthem different. But adding a protocol for pprint
(with extra parameters to convey options) is a fair idea. I note that Nick
sggested to use single-dispatch generic functions for this though. Both
have pros and cons. Post design ideas to python-ideas please, not here!
On Tuesday, May 21, 2013, Łukasz Langa wrote:
> Now you've got me wondering what Python would be like if repr, `` and
> __repr__ never existed as language features. Upon first thoughts, I
> don't see much downside (no, i'm not advocating making that change).
> Something to ponder.
> I have pondered it many times, although usually in the form "Why do we
> need both str and repr?"
> What if we did the opposite?
> 1. Make __str__() a protocol for arbitrary string conversion.
> 2. Move the current __repr__() contracts, both firm and informal to a new,
> extensible version of pprint.
> There has been some discussion led by Raymond in 2010 about a general
> `pprint rewrite`__ and I'm willing to pick up the idea with a PEP for
> inclusion in 3.4.
> __ http://bugs.python.org/issue7434
> Best regards,
> Łukasz Langa
> WWW: http://lukasz.langa.pl/
> Twitter: @llanga
> IRC: ambv on #python-dev
--Guido van Rossum (python.org/~guido)
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