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Groups > comp.lang.python > #82409
| From | Terry Reedy <tjreedy@udel.edu> |
|---|---|
| Subject | Re: Extension of while syntax |
| Date | 2014-12-11 22:00 -0500 |
| References | <14d2b880-3837-4267-a769-33ae7393f78b@googlegroups.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.16889.1418353269.18130.python-list@python.org> (permalink) |
On 12/11/2014 9:21 PM, Nelson Crosby wrote:
> I was thinking a bit about the following pattern:
>
> value = get_some_value()
> while value in undesired_values:
> value = get_some_value()
This is do_while or do_until. In Python, write it as do_until in this form.
while True:
value = get_some_value()
if value not in undesired_values:
break
> I've always hated code that looks like this. Partly due to the repetition,
> but partly also due to the fact that without being able to immediately
> recognise this pattern, it isn't very readable.
The repetitiion is easily eliminated.
> value = get_some_value() while value in undesired_values()
Forget this, or anything like it, as a 'serious' proposal.
--
Terry Jan Reedy
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Extension of while syntax Nelson Crosby <nc@sourcecomb.com> - 2014-12-11 18:21 -0800
Re: Extension of while syntax Ben Finney <ben+python@benfinney.id.au> - 2014-12-12 13:37 +1100
Re: Extension of while syntax Chris Angelico <rosuav@gmail.com> - 2014-12-12 13:38 +1100
Re: Extension of while syntax Marko Rauhamaa <marko@pacujo.net> - 2014-12-12 09:10 +0200
Re: Extension of while syntax Chris Angelico <rosuav@gmail.com> - 2014-12-12 18:38 +1100
Re: Extension of while syntax Marko Rauhamaa <marko@pacujo.net> - 2014-12-12 10:25 +0200
Re: Extension of while syntax cl@isbd.net - 2014-12-12 09:09 +0000
Re: Extension of while syntax Marko Rauhamaa <marko@pacujo.net> - 2014-12-12 12:33 +0200
RE: Extension of while syntax "Clayton Kirkwood" <crk@godblessthe.us> - 2014-12-11 18:59 -0800
Re: Extension of while syntax Terry Reedy <tjreedy@udel.edu> - 2014-12-11 22:00 -0500
Re: Extension of while syntax Ben Finney <ben+python@benfinney.id.au> - 2014-12-12 14:14 +1100
Re: Extension of while syntax Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-12-12 08:00 +0000
Re: Extension of while syntax Chris Angelico <rosuav@gmail.com> - 2014-12-12 19:05 +1100
Re: Extension of while syntax Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-12-12 11:38 -0500
Re: Extension of while syntax Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-12-13 22:56 +1100
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