Fix imports in notebook (#9458)

docs/extras/integrations/llms/huggingface_pipelines.ipynb

@@ -21,19 +21,19 @@
     "tags": []
    },
    "source": [
-    "To use, you should have the ``transformers`` python [package installed](https://pypi.org/project/transformers/)."
+    "To use, you should have the ``transformers`` python [package installed](https://pypi.org/project/transformers/), as well as [pytorch](https://pytorch.org/get-started/locally/). You can also install `xformer` for a more memory-efficient attention implementation."
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": null,
    "id": "d772b637-de00-4663-bd77-9bc96d798db2",
    "metadata": {
     "tags": []
    },
    "outputs": [],
    "source": [
-    "!pip install transformers > /dev/null"
+    "%pip install transformers --quiet"
    ]
   },
   {
@@ -46,22 +46,14 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 6,
    "id": "165ae236-962a-4763-8052-c4836d78a5d2",
    "metadata": {
     "tags": []
    },
-   "outputs": [
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      "WARNING:root:Failed to default session, using empty session: HTTPConnectionPool(host='localhost', port=8000): Max retries exceeded with url: /sessions (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x1117f9790>: Failed to establish a new connection: [Errno 61] Connection refused'))\n"
-     ]
-    }
-   ],
+   "outputs": [],
    "source": [
-    "from langchain import HuggingFacePipeline\n",
+    "from langchain.llms import HuggingFacePipeline\n",
     "\n",
     "llm = HuggingFacePipeline.from_model_id(\n",
     "    model_id=\"bigscience/bloom-1b7\",\n",
@@ -75,24 +67,18 @@
    "id": "00104b27-0c15-4a97-b198-4512337ee211",
    "metadata": {},
    "source": [
-    "### Integrate the model in an LLMChain"
+    "### Create Chain\n",
+    "\n",
+    "With the model loaded into memory, you can compose it with a prompt to\n",
+    "form a chain."
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 7,
    "id": "3acf0069",
    "metadata": {},
    "outputs": [
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      "/Users/wfh/code/lc/lckg/.venv/lib/python3.11/site-packages/transformers/generation/utils.py:1288: UserWarning: Using `max_length`'s default (64) to control the generation length. This behaviour is deprecated and will be removed from the config in v5 of Transformers -- we recommend using `max_new_tokens` to control the maximum length of the generation.\n",
-      "  warnings.warn(\n",
-      "WARNING:root:Failed to persist run: HTTPConnectionPool(host='localhost', port=8000): Max retries exceeded with url: /chain-runs (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x144d06910>: Failed to establish a new connection: [Errno 61] Connection refused'))\n"
-     ]
-    },
     {
      "name": "stdout",
      "output_type": "stream",
@@ -102,27 +88,19 @@
     }
    ],
    "source": [
-    "from langchain import PromptTemplate, LLMChain\n",
+    "from langchain.prompts import PromptTemplate\n",
     "\n",
     "template = \"\"\"Question: {question}\n",
     "\n",
     "Answer: Let's think step by step.\"\"\"\n",
-    "prompt = PromptTemplate(template=template, input_variables=[\"question\"])\n",
+    "prompt = PromptTemplate.from_template(template)\n",
     "\n",
-    "llm_chain = LLMChain(prompt=prompt, llm=llm)\n",
+    "chain = prompt | llm\n",
     "\n",
     "question = \"What is electroencephalography?\"\n",
     "\n",
-    "print(llm_chain.run(question))"
+    "print(chain.invoke({\"question\": question}))"
    ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "843a3837",
-   "metadata": {},
-   "outputs": [],
-   "source": []
   }
  ],
  "metadata": {