Re: pyepics autosave

[Matt Newville via Tech-talk <tech-talk@aps.anl.gov>]

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

https://github.com/pyepics/pyepics/blob/master/epics/autosave/save_restore.py#L184

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