Add Python 3.8 to be tested as well

[marcelotrevisani]

No description provided.

[marcelotrevisani]

There is no Python 3.8 on Azure... That is funny...
Let's wait a couple of weeks to see if they are going to add it

[marcelotrevisani]

Related to https://github.com/microsoft/azure-pipelines-image-generation/issues/1317

[scopatz]

ok!

[henryiii]

It's landed on Github Actions, and is rolling out on Azure; I would expect it soon.

[marcelotrevisani]

Well, now we have Python 3.8. However, we do not have the whole dependencies on conda-forge for python 3.8 😅

[scopatz]

yeah, I think we need to wait until the dependencies are there too

[marcelotrevisani]

It seems there is a bug on xonsh which needs to be addressed or we can pin an older version of xonsh.

[scopatz]

Yeah, I should release a new version of xonsh. Hopefully I can get to that today.

[scopatz]

Or rather @marcelotrevisani - what do you think the bug is?

[marcelotrevisani]

Or rather @marcelotrevisani - what do you think the bug is?

I didn't investigate it much further (because I'm still at my work), but it seems the shell object was not created and it is returning a None object. The reason behind it I still don't know.

So, basically it calls the print_color

def print_color(string, **kwargs):
    """Prints a string that may contain colors. This dispatched to the shell
    method of the same name. Colors will be formatted if they have not already
    been.
    """
    builtins.__xonsh__.shell.shell.print_color(string, **kwargs)

However, builtins.__xonsh__.shell is returning None