Add semshi plugin for python

lua/plugins/languages.lua

@@ -230,6 +230,38 @@ return {
     end,
     event = "VeryLazy", -- Optional: needed only if you want to type `:VenvSelect` without a keymapping
   },
+  -- numiras/semshi
+  -- Semantic Highlighting for Python in Neovim
+  {
+    "wookayin/semshi", -- use a maintained fork
+    ft = "python",
+    build = ":UpdateRemotePlugins",
+    init = function()
+      -- Disabled these features better provided by LSP or other more general plugins
+      vim.g["semshi#error_sign"] = false
+      vim.g["semshi#simplify_markup"] = false
+      vim.g["semshi#mark_selected_nodes"] = false
+      vim.g["semshi#update_delay_factor"] = 0.001
+
+      -- This autocmd must be defined in init to take effect
+      vim.api.nvim_create_autocmd({ "VimEnter", "ColorScheme" }, {
+        group = vim.api.nvim_create_augroup("SemanticHighlight", {}),
+        callback = function()
+          -- Only add style, inherit or link to the LSP's colors
+          vim.cmd([[
+            highlight! semshiGlobal gui=italic
+            highlight! semshiImported gui=bold
+            highlight! link semshiParameter @lsp.type.parameter
+            highlight! link semshiParameterUnused DiagnosticUnnecessary
+            highlight! link semshiBuiltin @function.builtin
+            highlight! link semshiAttribute @attribute
+            highlight! link semshiSelf @lsp.type.selfKeyword
+            highlight! link semshiUnresolved @lsp.type.unresolvedReference
+            ]])
+        end,
+      })
+    end,
+  },
 
   --------------------- Go ----------------------
   -- go.nvim