[Python-ideas] Membership of infinite iterators

Stephan Houben stephanh42 at gmail.com
Wed Oct 18 10:44:57 EDT 2017

Hi all,

FWIW, I just tried the list(count()) experiment on my phone (Termux Python
interpreter under Android).

Python 3.6.2 (default, Sep 16 2017, 23:55:07)
[GCC 4.2.1 Compatible Android Clang 5.0.300080 ] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import itertools
>>> list(itertools.count())

Interestingly even the Termux app stays alive and otherwise the phone
remains responsive and doesn't get hot. I am now sending this mail from
that very phone.

So this issue is not an issue on the world's most popular OS 😁


Op 18 okt. 2017 08:46 schreef "Brendan Barnwell" <brenbarn at brenbarn.net>:

> On 2017-10-17 07:26, Serhiy Storchaka wrote:
>> 17.10.17 17:06, Nick Coghlan пише:
>>> >Keep in mind we're not talking about a regular loop you can break out of
>>> >with Ctrl-C here - we're talking about a tight loop inside the
>>> >interpreter internals that leads to having to kill the whole host
>>> >process just to get out of it.
>> And this is the root of the issue. Just let more tight loops be
>> interruptible with Ctrl-C, and this will fix the more general issue.
>         I was just thinking the same thing.  I think in general it's
> always bad for code to be uninterruptible with Ctrl-C.  If these infinite
> iterators were fixed so they could be interrupted, this containment problem
> would be much less painful.
> --
> Brendan Barnwell
> "Do not follow where the path may lead.  Go, instead, where there is no
> path, and leave a trail."
>    --author unknown
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