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From: Grant Edwards <invalid@invalid.invalid>
Newsgroups: comp.lang.python
Subject: Re: Default Value
Date: Mon, 24 Jun 2013 14:22:23 +0000 (UTC)
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On 2013-06-22, Ian Kelly <ian.g.kelly@gmail.com> wrote:
> On Fri, Jun 21, 2013 at 7:15 PM, Steven D'Aprano
><steve+comp.lang.python@pearwood.info> wrote:
>> On Fri, 21 Jun 2013 23:49:51 +0100, MRAB wrote:
>>
>>> On 21/06/2013 21:44, Rick Johnson wrote:
>> [...]
>>>> Which in Python would be the "MutableArgumentWarning".
>>>>
>>>> *school-bell*
>>>>
>>> I notice that you've omitted any mention of how you'd know that the
>>> argument was mutable.
>>
>> That's easy. Just call ismutable(arg). The implementation of ismutable is
>> just an implementation detail, somebody else can work that out. A
>> language designer of the sheer genius of Rick can hardly be expected to
>> worry himself about such trivial details.
>
> While we're at it, I would like to petition for a function
> terminates(f, args) that I can use to determine whether a function
> will terminate before I actually call it.

I think it should be terminate_time() -- so you can also find out how
long it's going to run.  It can return None if it's not going to
terminate...

-- 
Grant Edwards               grant.b.edwards        Yow! I'm continually AMAZED
                                  at               at th'breathtaking effects
                              gmail.com            of WIND EROSION!!