Things are a little bit different when using Coc. Since you're not installing a specific python plugin, all interaction goes through coc. On https://github.com/neoclide/coc.nvim you can see the example vim.init file, and it has the keybindings for coc commands (e.g. `nmap <silent> gd <Plug>(coc-definition)`). Now the problem comes when the commands that coc exposes don't map up to the commands you want to call (in jedi). Also I have sometimes noticed that some functionality would give an error message, although since these are things I wouldn't use too often anyways, I let them slide.