Experimental Physics and
Industrial Control System

Matthieu Bec <[email protected]> · Wed, 05 Sep 2007 21:34:18 -0400

Hi,

similarly I keep a less publicized python/CA module since 1999, mainly
stemming from personal interest in developing python extensions. The
module has built in help and features I found usefull and created as I
needed to interface with Epics systems

- ca_preemptive_callbacks is configurable at startup: GTK/Glade UI
seemed to better integrate a non threaded model, while shell/curses
tools work nicely using the python interpreter lock and threads.

- 'one shot' CA put/get

- 'long lived' pv channels as python objects

Support is limited to put/get/monitor.
there are no sites for download but I can share this `yet another python/ca`
Matthieu

J. Lewis Muir wrote:

On 9/5/07 1:57 AM, Heinrich du Toit wrote:

Hi
My question is simply.
Which one?

Hi, Heinrich.
"No. There is another." :-)
I use EpicsCA, written by Matthew Newville:
 http://cars9.uchicago.edu/~newville/Epics/Python/
It has worked quite well for me and has good documentation.
-lewis
On the web-site there are 2 different CaPython links. One from FNAL
and one from KEK.
I've downloaded KEK so far. Mainly because of the multi-threaded claim.
It seems to do the basics cleanly and easily. I even manage to setup a
monitor fairly easy.
But I can't seem to find documentation on this.
Most of the other info is about the one from FNAL.

I don't know much about this. Accept that it has 2 parts caPython and
caChannel.
So which one do I use?
Which one is supposedly newer?
Which one is more widely used by other people?
Any specific pro's cons about them?
And if KEK's - where do I find documenation? The documentation inside
the library doesn't really tell you what todo and the samples is way to
big to figure out what is going on.

--
Matthieu Bec              Gemini Observatory
Tel: +56 51 205785        c/o AURA, Casilla 603
Fax: +56 51 205650        La Serena, Chile

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System