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Subject: Re: pyepics autosave
From: Matt Newville via Tech-talk <tech-talk@aps.anl.gov>
To: Sandeep Kumar Malu - UKRI STFC <sandeep-kumar.malu@stfc.ac.uk>
Cc: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Fri, 6 Sep 2019 07:45:41 -0500
Hi Sandeep,

On Fri, Sep 6, 2019 at 4:46 AM Sandeep Kumar Malu - UKRI STFC via Tech-talk <tech-talk@aps.anl.gov> wrote:

Hi,

 

I am trying to save some of the PVs following the link

https://cars9.uchicago.edu/software/python/pyepics3/autosave.html

 

However when I try to save PVs which has hyphen (“-“) e.g .  Z-CAM:WARNING thows an exception “Expected end of line, found '-' “. But all other PVs autosave works fine. Any way to fix it?



Oh, yes, I see that this module is making bad assumptions about what a PV name can be.  This is at

which currently reads:
    pv_name = Word(alphanums+":._$()")

That would definitely need a '-' added.    For now, you could just add that to the `epics/autosave/save_restore.py` file on your system to see if that fixes the problem.

I believe this should also allow '{' and '}', but I'm not sure if there are other characters that should be allowed.

Is there a published regex _expression_ for valid PV names?

--Matt



Replies:
Re: pyepics autosave Mark Rivers via Tech-talk
RE: pyepics autosave Sandeep Kumar Malu - UKRI STFC via Tech-talk
References:
pyepics autosave Sandeep Kumar Malu - UKRI STFC via Tech-talk

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