No python 3.8 wheel available

[Emily Bourne]

There is no python 3.8 wheel available on pypi (https://pypi.org/project/mpi4py/#files).
Now that anaconda (version 2020.07) ships with python 3.8 by default this is likely to be a problem

[Lisandro Dalcin]

Are you a Windows user?

I can attempt to generate a wheel on AppVeyor out of the maint branch in the repo and upload the wheel to PyPI.

Could you please offer yourself to test the wheel file in advance before I upload it?

[Emily Bourne]

I am a windows user on travis which is not ideal for debugging anything. But I can open a branch and check if it works out of the box

[Lisandro Dalcin]

OK, so you are that kind of Windows user, you are family

Here you have the x86 and x64 builds https://ci.appveyor.com/project/mpi4py/mpi4py/builds/34489790

Enter each build, click in Artifacts, you will get the URL to the wheel file.

Let me know whether they work on your side. If all is good, I’ll upload them to PyPI.

[Emily Bourne]

The x64 wheel seems to work out of the box. I don’t have a 32 bit windows image so pip won’t let me use the x86 build. Given the weak support for windows on travis I am not sure that I will be able to test the x86 build

[Lisandro Dalcin]

Never mind, if the x64 build works on your side that’s good enough.

I just uploaded the new wheels to PyPI.