Installation Issues with new version Python 3.7

Dear community,
thank you for the room here provided to questions and tips, although I am not even sure if I am writing in the right place! In case, I’ll be sorry for that.

Back to my issue: I had to install Vespa again on my Windows 10 and following the online step by step procedure ( I and colleagues of mine as well, end up with an error on downloading and installing the libraries pygamma and vespa-suite.
The error from conda prompt says:
ERROR: Could not find a version that satisfies the requirement pygamma (from versions: none)
ERROR: No matching distribution found for pygamma

pip search finds the package but I don’t get the reason why I can not install it.
Do you have any tips on it?
Thanks a lot.


HI Rudy,

Sorry for the delay, I turned off notifications last week while submitting a grant and, ahem, never turned them back on.

Anyway. The problem is that I don’t have the wheels in PyPI for Vespa to run under Python 3.7. I’m not sure how that wiki page got published (likely I pushed the wrong button) but Vespa for Python 3.7 is still in ‘beta’. I would strongly recommend using the instructions for Vespa under Python 2.7 for now. It’s at:

The new version for Python 3.7 should be out in a couple of weeks. If you want to be a beta tester, I’d be happy to send you the links to the TestPyPI site for install. But, if that’s too much trouble for now, go ahead with Vespa version 0.10.0 on PyPI for now.

Sorry for the confusion!