refactor: reformat notebook template (#4414)

* refactor: reformat notebook template

* Update Python version to 3.12

* Fix an import

* Update licience year

.github/workflows/ci.yaml

@@ -9,7 +9,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
-        python-version: '3.14'      
+        python-version: '3.12'      
     - name: Fetch pull request branch
       uses: actions/checkout@v6
       with:

notebooks/notebook_template.ipynb

@@ -8,7 +8,7 @@
       },
       "outputs": [],
       "source": [
-        "# Copyright 2025 Google LLC\n",
+        "# Copyright 2026 Google LLC\n",
         "#\n",
         "# Licensed under the Apache License, Version 2.0 (the \"License\");\n",
         "# you may not use this file except in compliance with the License.\n",
@@ -85,7 +85,7 @@
         "id": "No17Cw5hgx12"
       },
       "source": [
-        "### Install Vertex AI SDK for Python and other required packages\n"
+        "### Install required packages\n"
       ]
     },
     {
@@ -99,6 +99,29 @@
         "! pip3 install --upgrade --quiet google-cloud-aiplatform"
       ]
     },
+    {
+      "cell_type": "markdown",
+      "metadata": {
+        "id": "1e9f41eb4f56"
+      },
+      "source": [
+        "### Import libraries"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "metadata": {
+        "id": "15601a82db68"
+      },
+      "outputs": [],
+      "source": [
+        "import os\n",
+        "import sys\n",
+        "\n",
+        "import vertexai"
+      ]
+    },
     {
       "cell_type": "markdown",
       "metadata": {
@@ -118,10 +141,7 @@
       },
       "outputs": [],
       "source": [
-        "import sys\n",
-        "\n",
         "if \"google.colab\" in sys.modules:\n",
-        "\n",
         "    from google.colab import auth\n",
         "\n",
         "    auth.authenticate_user()"
@@ -146,8 +166,6 @@
       },
       "outputs": [],
       "source": [
-        "import os\n",
-        "\n",
         "PROJECT_ID = \"[your-project-id]\"  # @param {type: \"string\", placeholder: \"[your-project-id]\", isTemplate: true}\n",
         "if not PROJECT_ID or PROJECT_ID == \"[your-project-id]\":\n",
         "    PROJECT_ID = str(os.environ.get(\"GOOGLE_CLOUD_PROJECT\"))\n",
@@ -161,7 +179,7 @@
         "id": "d95621cbf42f"
       },
       "source": [
-        "### Initialize Vertex AI SDK for Python"
+        "### Initialize Vertex AI SDK"
       ]
     },
     {
@@ -172,8 +190,6 @@
       },
       "outputs": [],
       "source": [
-        "import vertexai\n",
-        "\n",
         "vertexai.init(project=PROJECT_ID, location=LOCATION)"
       ]
     },