Oh this mess. Yeah I ran into this too while trying to get PsychoPy on my system’s python3 environment, and I did manage to fix it, but it’s annoying. If you’re on a mac, I had to first solve the problem with installing pytables, which required using homebrew to fix c-blosc using:
brew install c-blosc
brew link --overwrite c-blosc
Then manually running PsychoPy’s setup.py.
The fundamental issue is with pytables, so I basically googled all the issues with pytables first and that eventually led me to the right solution.
However, the standalone app version just works for me regardless, so unless you specifically need it on your system python you can just use that.