local function keyword_help(kw)
    local buf = vim.api.nvim_create_buf(false, true)
    local win = vim.api.nvim_open_win(buf, true, {
        anchor = "SE",
        split = "below",
        height = 20,
    })
    local obj = vim.system({ "pydoc-markdown", "-m", kw }):wait() --  "--render-toc"??
    vim.api.nvim_buf_set_lines(buf, -1, -1, false, vim.split(obj.stdout, "\n"))
    vim.bo[buf].filetype = "markdown"
    vim.bo[buf].swapfile = false
end

vim.api.nvim_create_user_command("PyDoc", function(params)
    if #params.fargs > 0 then
        keyword_help(params.fargs[1])
    end
end, {
    bar = true,
    range = true,
    addr = "other",
    nargs = "*",
    complete = function(...)
        vim.print("completion request: " .. vim.inspect(...))
        return nil
    end,
})

vim.cmd([[ setlocal keywordprg=:PyDoc ]])