Re: Python Questions - July 25, 2015

From	Laura Creighton <lac@openend.se>
Subject	Re: Python Questions - July 25, 2015
References	(2 earlier) <WH4tx.31911$zk7.16739@fx26.am4> <mp6e1a$knj$1@dont-email.me> <mailman.1044.1438073468.3674.python-list@python.org> <ybItx.48040$vg2.2941@fx34.am4> <55b7a9f5$0$1668$c3e8da3$5496439d@news.astraweb.com><jkOtx.42040$Ec3.13257@fx24.am4>
Date	2015-07-29 18:13 +0200
Newsgroups	comp.lang.python
Message-ID	<mailman.1073.1438186424.3674.python-list@python.org> (permalink)

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In a message of Tue, 28 Jul 2015 17:45:00 +0100, BartC writes:
>On 28/07/2015 17:12, Steven D'Aprano wrote:
>> On Tue, 28 Jul 2015 07:46 pm, BartC wrote:
>>
>>> (I'm still reeling from the size of that Anaconda download. Apparently
>>> it contains a whole bunch of stuff, nothing to do with numpy, that I
>>> don't need. But one of the listed packages was 'libffi', which is
>>> puzzling. This library lets a C-like language call functions with
>>> runtime-determined argument types. How would that be used in Python?)
>>
>> https://en.wikipedia.org/wiki/Libffi
>
>Yes, I know (I was looking at it myself a few days ago for another 
>project). But while it might be used for implementing some of Python's 
>internals, I was wondering what it was doing in a user-level set of 
>libraries, given that it's mostly a bunch of C code.
>
>Perhaps they were just padding the list to make it look more impressive.

People who use numpy also want to load up their c extensions a
whole lot.  If you have a hunk of C code (a library, ususually) and
you want to call it from your python code, and play with its
objects just like they were python objects, this is one of the
most common ways to do this.

Laura

Thread

Python Questions - July 25, 2015 "E.D.G." <edgrsprj@ix.netcom.com> - 2015-07-25 04:39 -0500
  Python Questions - July 25, 2015 tandrewjohnson@outlook.com - 2015-07-25 04:36 -0700
    Python Questions - July 25, 2015 tandrewjohnson@outlook.com - 2015-07-25 04:39 -0700
    Re: Python Questions - July 25, 2015 "E.D.G." <edgrsprj@ix.netcom.com> - 2015-07-25 08:16 -0500
      Re: Python Questions - July 25, 2015 Laura Creighton <lac@openend.se> - 2015-07-25 15:59 +0200
        Re: Python Questions - July 25, 2015 "E.D.G." <edgrsprj@ix.netcom.com> - 2015-07-26 12:49 -0500
          Re: Python Questions - July 25, 2015 Laura Creighton <lac@openend.se> - 2015-07-26 20:38 +0200
            Re: Python Questions - July 25, 2015 "E.D.G." <edgrsprj@ix.netcom.com> - 2015-07-26 13:48 -0500
    Re: Python Questions - July 25, 2015 BartC <bc@freeuk.com> - 2015-07-26 13:49 +0100
      Re: Python Questions - July 25, 2015 Chris Angelico <rosuav@gmail.com> - 2015-07-26 23:07 +1000
        Re: Python Questions - July 25, 2015 BartC <bc@freeuk.com> - 2015-07-26 15:30 +0100
      Re: Python Questions - July 25, 2015 Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-07-26 14:19 +0100
      Re: Python Questions - July 25, 2015 Steven D'Aprano <steve@pearwood.info> - 2015-07-27 00:22 +1000
        Re: Python Questions - July 25, 2015 BartC <bc@freeuk.com> - 2015-07-26 15:58 +0100
      Re: Python Questions - July 25, 2015 Rob Gaddi <rgaddi@technologyhighland.invalid> - 2015-07-27 23:14 +0000
        Re: Python Questions - July 25, 2015 Terry Reedy <tjreedy@udel.edu> - 2015-07-28 04:50 -0400
          Re: Python Questions - July 25, 2015 BartC <bc@freeuk.com> - 2015-07-28 10:46 +0100
            Re: Python Questions - July 25, 2015 Chris Angelico <rosuav@gmail.com> - 2015-07-28 20:17 +1000
              Re: Python Questions - July 25, 2015 BartC <bc@freeuk.com> - 2015-07-28 11:44 +0100
                Re: Python Questions - July 25, 2015 Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-07-28 13:47 +0100
                Re: Python Questions - July 25, 2015 Steven D'Aprano <steve@pearwood.info> - 2015-07-29 02:02 +1000
            Re: Python Questions - July 25, 2015 Steven D'Aprano <steve@pearwood.info> - 2015-07-29 02:12 +1000
              Re: Python Questions - July 25, 2015 BartC <bc@freeuk.com> - 2015-07-28 17:45 +0100
                Re: Python Questions - July 25, 2015 Rob Gaddi <rgaddi@technologyhighland.invalid> - 2015-07-28 18:46 +0000
                Re: Python Questions - July 25, 2015 Laura Creighton <lac@openend.se> - 2015-07-29 18:13 +0200
                Re: Python Questions - July 25, 2015 BartC <bc@freeuk.com> - 2015-07-29 17:50 +0100
          Re: Python Questions - July 25, 2015 wxjmfauth@gmail.com - 2015-07-28 07:09 -0700
        Re: Python Questions - July 25, 2015 Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-07-28 13:58 +0100
  Re: Python Questions - July 25, 2015 Laura Creighton <lac@openend.se> - 2015-07-25 15:30 +0200
    Re: Python Questions - July 25, 2015 "E.D.G." <edgrsprj@ix.netcom.com> - 2015-07-25 08:45 -0500
  Re: Python Questions - July 25, 2015 tjohnson <tandrewjohnson@outlook.com> - 2015-07-25 15:16 -0700
  Re: Python Questions - July 25, 2015 "E.D.G." <edgrsprj@ix.netcom.com> - 2015-07-26 14:17 -0500
    Re: Python Questions - July 25, 2015 mm0fmf <none@mailinator.com> - 2015-07-26 22:15 +0100
      Re: Python Questions - July 25, 2015 "E.D.G." <edgrsprj@ix.netcom.com> - 2015-07-26 17:08 -0500
        Re: Python Questions - July 25, 2015 "E.D.G." <edgrsprj@ix.netcom.com> - 2015-07-26 17:32 -0500
      Re: Python Questions - July 25, 2015 Ned Batchelder <ned@nedbatchelder.com> - 2015-07-26 16:12 -0700
        Re: Python Questions - July 25, 2015 "E.D.G." <edgrsprj@ix.netcom.com> - 2015-07-26 18:58 -0500
          Re: Python Questions - July 25, 2015 Laura Creighton <lac@openend.se> - 2015-07-27 11:15 +0200
        Re: Python Questions - July 25, 2015 Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-07-27 01:18 +0100
          Re: Python Questions - July 25, 2015 mm0fmf <none@mailinator.com> - 2015-07-27 17:46 +0100
    Re: Python Questions - July 25, 2015 tjohnson <tandrewjohnson@outlook.com> - 2015-07-27 03:24 -0700
      Re: Python Questions - July 25, 2015 wxjmfauth@gmail.com - 2015-07-29 00:43 -0700

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