(FWIW, I've formally rejected the PEP now, referring to this message.) --Guido
On 7/3/07, Guido van Rossum <[EMAIL PROTECTED]> wrote: > On 6/30/07, Matt Chisholm <[EMAIL PROTECTED]> wrote: > > I've created and submitted a new PEP proposing support for labels in > > Python's break and continue statements. Georg Brandl has graciously > > added it to the PEP list as PEP 3136: > > > > http://www.python.org/dev/peps/pep-3136/ > > I think this is a good summary of various proposals that have been > floated in the past, plus some new ones. As a PEP, it falls short > because it doesn't pick a solution but merely offers a large menu of > possible options. Also, there is nothing about implementation yet. > > However, I'm rejecting it on the basis that code so complicated to > require this feature is very rare. In most cases there are existing > work-arounds that produce clean code, for example using 'return'. > While I'm sure there are some (rare) real cases where clarity of the > code would suffer from a refactoring that makes it possible to use > return, this is offset by two issues: > > 1. The complexity added to the language, permanently. This affects not > only all Python implementations, but also every source analysis tool, > plus of course all documentation for the language. > > 2. My expectation that the feature will be abused more than it will be > used right, leading to a net decrease in code clarity (measured across > all Python code written henceforth). Lazy programmers are everywhere, > and before you know it you have an incredible mess on your hands of > unintelligible code. > > I realize this is a heavy bar to pass, and somewhat subjective. That's > okay. There is real value in having a small language. Also, as I said, > while there are no past PEPs to document it, this has been brought up > and rejected many times before. > > -- > --Guido van Rossum (home page: http://www.python.org/~guido/) > -- --Guido van Rossum (home page: http://www.python.org/~guido/) _______________________________________________ Python-3000 mailing list Python-3000@python.org http://mail.python.org/mailman/listinfo/python-3000 Unsubscribe: http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
