use fet package

latest.package.json

@@ -3,7 +3,7 @@
     "theia": {
         "frontend": {
             "config": {
-                "applicationName": "Theia Python Example",
+                "applicationName": "Theia FET (python)",
                 "preferences": {
                     "files.enableTrash": false
                 }
@@ -30,9 +30,6 @@
     "devDependencies": {
         "@theia/cli": "latest"
     },
-    "scripts": {
-        "preinstall": "node-gyp install"
-    },
     "theiaPluginsDir": "plugins",
     "theiaPlugins": {
         "vscode-builtin-bat": "https://github.com/theia-ide/vscode-builtin-extensions/releases/download/v1.39.1-prel/bat-1.39.1-prel.vsix",
@@ -99,6 +96,6 @@
         "vscode-builtin-xml": "https://github.com/theia-ide/vscode-builtin-extensions/releases/download/v1.39.1-prel/xml-1.39.1-prel.vsix",
         "vscode-builtin-yaml": "https://github.com/theia-ide/vscode-builtin-extensions/releases/download/v1.39.1-prel/yaml-1.39.1-prel.vsix",
         "vscode-editorconfig": "https://github.com/theia-ide/editorconfig-vscode/releases/download/v0.14.4/EditorConfig-0.14.4.vsix",
-        "vscode-python": "https://open-vsx.org/api/ms-python/python/2020.8.105369/file/ms-python.python-2020.8.105369.vsix"
+        "vscode-python": "https://github.com/microsoft/vscode-python/releases/download/2020.1.58038/ms-python-release.vsix"
     }
-}
+}