add package versions to the top of the notebook

ch03/01_main-chapter-code/ch03.ipynb

@@ -8,6 +8,35 @@
     "# Chapter 3: Understanding Attention Mechanisms"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "c29bcbe8-a034-43a2-b557-997b03c9882d",
+   "metadata": {},
+   "source": [
+    "Packages that are being used in this notebook:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "e58f33e8-5dc9-4dd5-ab84-5a011fa11d92",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "torch version: 2.0.1\n"
+     ]
+    }
+   ],
+   "source": [
+    "from importlib.metadata import version\n",
+    "import torch\n",
+    "\n",
+    "print(\"torch version:\", version(\"torch\"))"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "ecc4dcee-34ea-4c05-9085-2f8887f70363",
@@ -1760,7 +1789,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.6"
+   "version": "3.11.4"
   }
  },
  "nbformat": 4,