Update ollama address (#861)

Author: rasbt

ch07/01_main-chapter-code/ch07.ipynb

@@ -2278,19 +2278,39 @@
   },
   {
    "cell_type": "markdown",
-   "id": "747a2fc7-282d-47ec-a987-ed0a23ed6822",
-   "metadata": {
-    "id": "747a2fc7-282d-47ec-a987-ed0a23ed6822"
-   },
+   "id": "267cd444-3156-46ad-8243-f9e7a55e66e7",
+   "metadata": {},
    "source": [
     "- For macOS and Windows users, click on the ollama application you downloaded; if it prompts you to install the command line usage, say \"yes\"\n",
     "- Linux users can use the installation command provided on the ollama website\n",
     "\n",
     "- In general, before we can use ollama from the command line, we have to either start the ollama application or run `ollama serve` in a separate terminal\n",
     "\n",
-    "<img src=\"https://sebastianraschka.com/images/LLMs-from-scratch-images/ch07_compressed/ollama-run.webp?1\" width=700px>\n",
+    "<img src=\"https://sebastianraschka.com/images/LLMs-from-scratch-images/ch07_compressed/ollama-run.webp?1\" width=700px>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "30266e32-63c4-4f6c-8be3-c99e05ed05b7",
+   "metadata": {},
+   "source": [
+    "---\n",
     "\n",
+    "**Note**:\n",
     "\n",
+    "- When running `ollama serve` in the terminal, as described above, you may encounter an error message saying `Error: listen tcp 127.0.0.1:11434: bind: address already in use`\n",
+    "- If that's the case, try use the command `OLLAMA_HOST=127.0.0.1:11435 ollama serve` (and if this address is also in use, try to increment the numbers by one until you find an address not in use\n",
+    "\n",
+    "---"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "747a2fc7-282d-47ec-a987-ed0a23ed6822",
+   "metadata": {
+    "id": "747a2fc7-282d-47ec-a987-ed0a23ed6822"
+   },
+   "source": [
     "- With the ollama application or `ollama serve` running in a different terminal, on the command line, execute the following command to try out the 8-billion-parameter Llama 3 model (the model, which takes up 4.7 GB of storage space, will be automatically downloaded the first time you execute this command)\n",
     "\n",
     "```bash\n",
@@ -2475,6 +2495,8 @@
     "def query_model(\n",
     "    prompt,\n",
     "    model=\"llama3\",\n",
+    "    # If you used OLLAMA_HOST=127.0.0.1:11435 ollama serve\n",
+    "    # update the address from 11434 to 11435\n",
     "    url=\"http://localhost:11434/api/chat\"\n",
     "):\n",
     "    # Create the data payload as a dictionary\n",