Experimental Physics and
Industrial Control System

From: [email protected] [mailto:[email protected]] On Behalf Of Pavel Maslov
Sent: 17 December 2012 08:50
To: Carlos Pascual
Cc: EPICS Tech Talk
Subject: Re: How to get a list of all available PVs

On Mon, Dec 17, 2012 at 12:38 PM, Carlos Pascual <[email protected]> wrote:

Hi,

Sorry for this newbie question... I come from the Tango community, and I am
quite lost with Epics

I am a developer of Taurus [1], a GUI library initially designed to provide
PyQT GUIs on top of Tango. But our goal is to also support other
communication/control systems such as Epics.

I recently implemented some very basic support for epics in Taurus (just a
proof of concept) using PyEpics, and one of the first questions that I came
across is:

How can I obtain a list of all PVs that are available?

... or even better, can I get a list of all PVs whose name contains a certain
prefix?

The reason I want this is that I want to create a browser/selector of PVs. I
do not care that much if the method is slow (I could live with doing it once
and only manually refreshing the list).
But I need the method to be generic, i.e. it should not assume some non-
standard service (such a site-dependent database) to be available.

Is this possible at all?

Cheers,

[1] http://www.tango-controls.org/static/taurus/latest/doc/html/

--
+----------------------------------------------------+
 Carlos Pascual Izarra
 Scientific Software Coordinator
 Computing Division
 Cells / Alba Synchrotron  [http:/www.cells.es]
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 Phone: +34 93 592 4428
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