答复: How to define a global variable and global array in python script for a widget of Control system studio (CSS) ?

[lzf neu <lzfneu@live.com>]

Hi Anton,

Thanks for your relpy. It is a good idea and I have one more question to consult you.

Now, I have two PVs, one is my local PV (loc://record), another is external PV from epics (caLab:okok). The result of "camonitor caLab:okok" display 1,2,3,4,5,... each second.

and I want to put the value of caLab:okok to my local PV (loc://record) as an input for my script to store the value.

In my script, #0 is caLab:okok and #1 is loc://record, I try to write the script as the following lines:

from org.csstudio.opibuilder.scriptUtil import PVUtil
data=""> PVUtil.getDouble(pvs[1])=data

However, the error occurs:
SyntaxError:("can't assign to function call", ('<script>',3,0, 'PVUtil.getDouble(pvs[0])=value\n'))

Any help will be appreciated and thanks in advance.

---

发件人: Anton Derbenev <aaderbenev@gmail.com>
发送时间: 2017年10月30日 2:17
收件人: lzf neu
抄送: tech-talk@aps.anl.gov
主题: Re: How to define a global variable and global array in python script for a widget of Control system studio (CSS) ?

 

Hello Zhefu,

how about using a local PV to store the value? This would also give you the possibility to show it on your page, if needed. You can put local PV as an input for your script, e.g.:

loc://$(DID)_my_x(0)

implying that this possibility didn't change since I last checked...

Anton.

On Sun, Oct 29, 2017 at 10:33 AM, lzf neu <lzfneu@live.com> wrote:

Hi,

 

I want to add up a variable by 1 each time when PV are triggered and print the result in CSS terminal.

I try to define a variable x in python script as the following lines:

from org.csstudio.opibuilder.scriptUtil import PVUtil
x=0
x=x+1
print x

However, the results in CSS terminal are always print 1. And not 2, 3, 4, 5, 6, ....each time that I hope.

I have no idea how to define a global variable and a global array in python script for a widget of Control system studio (CSS), so that I can preserve the data each time.

Any help will be appreciated and thanks in advance !

Zhefu