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| References | <mailman.496.1354722393.29569.python-list@python.org> <50bf85c0$0$29994$c3e8da3$5496439d@news.astraweb.com> <CALwzidnEgW3ksKeXAuv-=TOseMRZ2vzFAUL89q1A+QAMr64KAQ@mail.gmail.com> <20121205182413.GI10865@hud> <k9obhj$r06$1@ger.gmane.org> |
|---|---|
| From | Chris Kaynor <ckaynor@zindagigames.com> |
| Date | 2012-12-05 12:49 -0800 |
| Subject | Re: why does dead code costs time? |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.523.1354740586.29569.python-list@python.org> (permalink) |
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On Wed, Dec 5, 2012 at 12:41 PM, Terry Reedy <tjreedy@udel.edu> wrote:
> On 12/5/2012 1:24 PM, Bruno Dupuis wrote:
>
>> On Wed, Dec 05, 2012 at 10:59:26AM -0700, Ian Kelly wrote:
>>>
>>> I think this should even be considered a bug, not just a missing
>>> optimization. Consider:
>>>
>>
>> This is definitely a bug
>>
>> globals()['None'] = 42
>>>>>> def f(x):
>>>>>>
>>>>> ... return None
>>> ... print(x)
>>> ...
>>>
>>>> f('test')
>>>>>>
>>>>> 42
>>>
>>
>> This one is pretty scary
>>
>> The difference between `return None` and `return` leads to inconsistency
>> and
>> is in contradiction with the specs, AFAIK. I'm glad we pointed this out.
>>
>
> You did not specify version, but I confirmed in 3.3.0. Please open a
> tracker issue.
It also occurs in 2.6.4
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why does dead code costs time? Bruno Dupuis <python.ml.bruno.dupuis@lisael.org> - 2012-12-05 16:46 +0100
Re: why does dead code costs time? Neil Cerutti <neilc@norwich.edu> - 2012-12-05 16:15 +0000
Re: why does dead code costs time? Bruno Dupuis <python.ml.bruno.dupuis@lisael.org> - 2012-12-05 17:40 +0100
Re: why does dead code costs time? Ramchandra Apte <maniandram01@gmail.com> - 2012-12-09 06:11 -0800
Re: why does dead code costs time? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-12-09 16:47 +0000
Re: why does dead code costs time? Ramchandra Apte <maniandram01@gmail.com> - 2012-12-12 21:23 -0800
Re: why does dead code costs time? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-12-13 06:01 +0000
Re: why does dead code costs time? rusi <rustompmody@gmail.com> - 2012-12-12 22:27 -0800
Re: why does dead code costs time? Cameron Simpson <cs@zip.com.au> - 2012-12-13 17:51 +1100
Re: why does dead code costs time? rusi <rustompmody@gmail.com> - 2012-12-12 22:59 -0800
Re: why does dead code costs time? Chris Angelico <rosuav@gmail.com> - 2012-12-13 18:03 +1100
Re: why does dead code costs time? Ramchandra Apte <maniandram01@gmail.com> - 2012-12-12 21:23 -0800
Re: why does dead code costs time? Bruno Dupuis <python.ml.bruno.dupuis@lisael.org> - 2012-12-05 18:19 +0100
Re: why does dead code costs time? Tim Roberts <timr@probo.com> - 2012-12-05 21:20 -0800
Re: why does dead code costs time? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-12-05 17:34 +0000
Re: why does dead code costs time? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-12-05 17:39 +0000
Re: why does dead code costs time? Ian Kelly <ian.g.kelly@gmail.com> - 2012-12-05 10:59 -0700
Re: why does dead code costs time? Bruno Dupuis <python.ml.bruno.dupuis@lisael.org> - 2012-12-05 19:24 +0100
Re: why does dead code costs time? Terry Reedy <tjreedy@udel.edu> - 2012-12-05 15:41 -0500
Re: why does dead code costs time? Chris Kaynor <ckaynor@zindagigames.com> - 2012-12-05 12:49 -0800
Re: why does dead code costs time? Bruno Dupuis <python.ml.bruno.dupuis@lisael.org> - 2012-12-05 21:50 +0100
Re: why does dead code costs time? Bruno Dupuis <python.ml.bruno.dupuis@lisael.org> - 2012-12-05 22:58 +0100
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