[zeromq-dev] pyczmq and ctx.set_linger()

[Michel Pelletier]

On Fri, Jan 17, 2014 at 6:34 AM, Greg Ward <greg at gerg.ca> wrote:

> On 17 January 2014, Pieter Hintjens said:
> > On Thu, Jan 16, 2014 at 9:01 PM, Michel Pelletier
> > <pelletier.michel at gmail.com> wrote:
> >
> > > Yes, pyczmq is very much a literal 1 to 1 wrapper around the czmq C
> > > interface.
> > >
> > > Note that there is also an "object oriented" interface:
> >
> > CZMQ was designed to allow an OO interface on top; it may not succeed
> > in all classes. Where it's possible I'd probably not expose the 1-1
> > wrapper at all, and only provide the proper OO interface. (Less
> > confusing for users, maybe?)
>
> Having played around with pyczmq a little bit for a few hours, I'm
> starting to wonder if that's really the right way to wrap CZMQ. My two
> concerns are 1) import-time overhead


This seems like an un-problem to me.  cffi parses the function declarations
on import, that takes a small amount time.  You pay that small price once.


> and 2) the C-style interface (not
> OO, un-Pythonic).
>

As I pointed out there is an "OO" interface.  Maybe it's the Lisper in me
talking, but... they're just functions.  They take arguments.  You call
them.  It's seems pretty straightforward and "Pythonic" to me.


> I note that pyzmq already solves both of these problems: it's much
> faster to import than pyczmq, and it exposes a nice Pythonic interface
> to the 0mq core API.
>

It certainly does and I'm quite fond of pyzmq, I use it in all my existing
zmq production code.  There's no reason why you shouldn't use one or the
other, or both at the same time.  pyczmq is going to be slower, guaranteed.
 CFFI does things in Python interpreter executed code that pyzmq does in
compiled C code, compiling away the interpreter and there is no doubt in my
mind that pyzmq is faster.  pyczmq is not an attempt by me to replace pyzmq
or supersede it in any way, my primary goals were to 1) learn CFFI, 2)
evaluate the czmq API (it's quite nice, and ironically, "Pythonic" from the
C point of view, passing the "instance" consistently as the first argument).

Would it make sense for pyzmq to wrap CZMQ as well?
>

I would say absolutely but I see MinRK doesn't agree.  But, the point is
kind of moot, as I said you can use both at the same time.  There is no
difference between czmq sockets and zmq sockets, and you can access the
inner context object in czmq via zctx_underlying (exposed as
pyczmq.zctx.underlying).

-Michel



>
>        Greg
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