What is the solution for this?
I have pythonnet-2.4.0.dev0-cp37 that I'm using at the moment (and don't know where I got it from) but still getting

so I assume this is still valid?

In the meantime I'm reverting back to 3.6.7.

3 steps to install latest pythonnet with python3.7 support:

git clone https://github.com/pythonnet/pythonnet
cd pythonnet
python setup.py install

Note that I'm pushing a fix when only VS 2017 is installed on machine:

#758

Somehow Appveyor CI still works without this fix and you can also find the wheels from these builds in the Appveyor artifacts.

@mistery you probably installed pybee from pypi and it depends on python 3.7, but pythonnet does not have python3.7 wheel on pypi yet.

@denfromufa, that's an interesting piece of information. I just downgraded Python to 3.6.7. and there everything works out of the box. Thanks for the feedback.

Yes, in general, I'm trying out PyBee (Briefcase) for Linux, Windows, and Android (potentially other platforms, as well). Will probably continue on 3.6 until other libraries are upgraded.

I have VS 2017 installed and can help out testing if you need any assistance.

Pythonnet works for Python 3.7 now?

For anyone coming to this issue, follow these instructions for newbies:

#780