Hi,
I wanted to install Python client for Neovim and I found that package python-neovim is version 0.3.2-3 from Wed 24 Apr 2019 02:42:13 AM CEST and that there also is a package called python-pynvim which is apparently built from the same project that is in the latest version 0.4.3-2.
I'd suggest to remove the old package python-neovim from repositories.
Thanks!