DOCS: format notebooks (#13371)

cookbook/advanced_rag_eval.ipynb

@@ -132,8 +132,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "from langchain.vectorstores import Chroma\n",
     "from langchain.embeddings import OpenAIEmbeddings\n",
+    "from langchain.vectorstores import Chroma\n",
     "\n",
     "baseline = Chroma.from_texts(\n",
     "    texts=all_splits_pypdf_texts,\n",
@@ -197,12 +197,13 @@
    "outputs": [],
    "source": [
     "# Image summary chain\n",
-    "import os\n",
     "import base64\n",
     "import io\n",
+    "import os\n",
     "from io import BytesIO\n",
-    "from PIL import Image\n",
+    "\n",
     "from langchain.schema.messages import HumanMessage\n",
+    "from PIL import Image\n",
     "\n",
     "\n",
     "def encode_image(image_path):\n",
@@ -270,9 +271,10 @@
    "source": [
     "import uuid\n",
     "from base64 import b64decode\n",
-    "from langchain.storage import InMemoryStore\n",
-    "from langchain.schema.document import Document\n",
+    "\n",
     "from langchain.retrievers.multi_vector import MultiVectorRetriever\n",
+    "from langchain.schema.document import Document\n",
+    "from langchain.storage import InMemoryStore\n",
     "\n",
     "\n",
     "def create_multi_vector_retriever(\n",
@@ -363,7 +365,7 @@
     }
    ],
    "source": [
-    "from IPython.display import display, HTML\n",
+    "from IPython.display import HTML, display\n",
     "\n",
     "\n",
     "def plt_img_base64(img_base64):\n",
@@ -472,6 +474,7 @@
    "outputs": [],
    "source": [
     "from operator import itemgetter\n",
+    "\n",
     "from langchain.schema.runnable import RunnablePassthrough\n",
     "\n",
     "# Prompt\n",
@@ -516,6 +519,7 @@
    "outputs": [],
    "source": [
     "import re\n",
+    "\n",
     "from langchain.schema import Document\n",
     "from langchain.schema.runnable import RunnableLambda\n",
     "\n",