How to detect xeus-python?

[krey]

How would you detect from code running in a notebook whether it is running in a xeus kernel?

To detect ipykernel, you could do:

'IPKernelApp' in sys.modules['IPython'].get_ipython().config

Is there a xeus analogue?

[martinRenou]

You could do something like:

sys.modules['IPython'].get_ipython().__class__.__name__ == 'XPythonShell'

[martinRenou]

It's a bit weak though. As this class is not part of the API, so we cannot ensure the name of the class will remain the same.

[JohanMabille]

I think we should add a config attribute to the XPythonShell class to be consistent xwith IPykernel.

[martinRenou]

This config attribute seems to come from Traitlets. And our shell already has it, but it's empty. We need to understand how it gets populated.

I see some references to IPKernelApp in ipython directly (https://github.com/ipython/ipython/search?q=ipkernelapp), I just hope it doesn't come from there...

[JohanMabille]

From what I see on my machine, it only contains the path to the connection file. I guess there might be more complex configurations, but we don't have to replicate IPykernel behavior, as long as we provide a similar way to identify whether the kernel is IPykernel or xeus-python.