Experimental Physics and
Industrial Control System

Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov> · Tue, 26 Apr 2022 11:49:43 -0700

On 4/26/22 02:43, Kuldeep Joshi wrote:

 > for pyDevSup, any suggestions as to how I can automate switching to the virtual environment before invoking the IOC?? (source ~/myvirtEnv/bin/activate??? at the start of st.cmd file??)

    All the 'activate' script does these days is modify $PATH so yoy
    can instead directly reference 'bin/python` in a virtualenv.

     > /path/to/env/bin/python myscript.py

How do I point the path to the virtual environment so that the IOC can use it.

If practical, (re)build pyDevSup against that specific interpreter.

make PYTHON=/path/to/env/bin/python

Alternately, if you are certain that the ABI versions match, you can
add $(TOP)/python$(PY_VER) to $PYTHONPATH and "import devsup".  The
"softIocPy*" executable isn't as special as it used to be.  For an
example run:

make ipython

which is a shortcut to run an ipython shell with $PYTHONPATH set
appropriately to for the $PYTHON used.

Also, I will mention

https://dls-controls.github.io/pythonSoftIOC/master/index.html

as possible an alternative which fits better into the python
ecosystem (cf. "pip install softioc").

W.R.T.

#!../../bin/linux-x86_64/softIocPy2.7
# Interpreter not started
dbLoadDatabase("../../dbd/softIocPy.dbd",0,0)
softIocPy_registerRecordDeviceDriver(pdbbase)
# Interpreter started

    or

     > #!/path/to/env/bin/python
     > ...

How do I do it while invoking the IOC, with st.cmd file where it is the #!/path/points/to/the/softioc

I am presently having another bash script file from which I activate the the virtual environment and invoking the st.cmd file

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System