Leaking of _PYVIZ_COMMS_INSTALLED environment variable in our system

[nishikantparmariam]

ALL software version info

Software Version Info

pyviz_comms==3.0.4

Description of expected behavior and the observed behavior

After upgrading to pyviz_comms==3.0.4 our internal setup complains about having a new environment variable _PYVIZ_COMMS_INSTALLED that seems to be added in #123 PR. We wanted to understand what was the intention for this and is it needed for some functionality to work?

Also, is it supposed to be set only in all non-Jupyter environments e.g. Python process, IPython but not Jupyterlab.

cc: @philippjfr

[hoxbro]

is it needed for some functionality to work.

Not right now. But at some point, it will likely be used in Panel to check if the environment launching Jupyter Lab has pyviz_comms installed in it.

Also, is it supposed to be set only in all non-Jupyter environments e.g. Python process, IPython but not Jupyterlab.

Yes. The environment variables should not be set when importing pyviz_comms inside Jupyterlab.