Virtual environments are very useful as they allow you to test install components without affecting the shared libraries.
You create an environment called env with
python3 -m venv env
but this gave
Error: Command ‘Ý’/u/py/env/bin/python3’, ‘-Im’, ‘ensurepip’, ‘–upgrade’, ‘–default-pip’¨’ returned non-zero exit status 1.
I think this was because my z/OS had no direct network connection. However
python3 -m venv –without-pip env –system-site-packages
worked. I needed the –system-site-packages, so I could build the extension.
Activate the environment
The instruction said use the command env/bin/activate but this failed
env/bin/activate: FSUM9209 cannot execute: reason code = ef076015: EDC5111I Permission denied.
worked. (Just . env/b*/a* worked for me.)
If you get
FSUM7332 syntax error: got Word, expecting )
You need to issue the command ( or put it in your .profile)
See here. (_BPXK_AUTOCVT Used when enabling automatic conversion of tagged files).
To get out of the virtual environment use
To delete the environment
remove the directory
rm -r env
Use the environment
You should now be able to use the environment.
You should check that the HOME environment variable is a directory with read/write access.
You may want to set up PYTHONHOME for special python packages.