[Python-Dev] Best Python API for exposing posix_spawn

[Gregory P. Smith]

On Mon, Jan 8, 2018 at 12:36 PM Serhiy Storchaka <storchaka at gmail.com>
wrote:

> 08.01.18 11:11, Pablo Galindo Salgado пише:
> > Following Gregory's comment on the PR I understand that he is proposing
> > to have three objects in the os module representing each action and pass
> > a sequence of these objects to the Python API. What I am not sure about
> > this is that there is no previous example of such classes in the os
> > module for other similar APIs and therefore I am not sure if there is a
> > better approach.
>
> I would pass a sequence like:
>
> [(os.close, 0),
>   (os.open, 1, '/tmp/mylog', os.O_WRONLY, 0o700),
>   (os.dup2, 1, 2),
> ]
>

i agree with just a list of tuples, but i suggest creating namedtuple
instances in the posix module for the purpose (one each for close, dup2,
open) .  Don't put a reference to a function in the tuple as Serhiy
suggested as, while obvious what it means, it gives the wrong impression to
the user: nothing is calling the Python functions.  This is a posix API
that takes a list of arguments for a specific set of system calls for _it_
to make for us in a specific order.

-gps


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