improve docs for indexes (#1146)

docs/modules/indexes/vectorstore_examples/weaviate.ipynb

@@ -0,0 +1,163 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "683953b3",
+   "metadata": {},
+   "source": [
+    "# Weaviate\n",
+    "\n",
+    "This notebook shows how to use functionality related to the Weaviate vector database."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "aac9563e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from langchain.embeddings.openai import OpenAIEmbeddings\n",
+    "from langchain.text_splitter import CharacterTextSplitter\n",
+    "from langchain.vectorstores import Weaviate\n",
+    "from langchain.document_loaders import TextLoader"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "a3c3999a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from langchain.document_loaders import TextLoader\n",
+    "loader = TextLoader('../../state_of_the_union.txt')\n",
+    "documents = loader.load()\n",
+    "text_splitter = CharacterTextSplitter(chunk_size=1000, chunk_overlap=0)\n",
+    "docs = text_splitter.split_documents(documents)\n",
+    "\n",
+    "embeddings = OpenAIEmbeddings()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "5888dcc7",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import weaviate\n",
+    "import os\n",
+    "\n",
+    "WEAVIATE_URL = \"\"\n",
+    "client = weaviate.Client(\n",
+    "    url=WEAVIATE_URL,\n",
+    "    additional_headers={\n",
+    "        'X-OpenAI-Api-Key': os.environ[\"OPENAI_API_KEY\"]\n",
+    "    }\n",
+    ")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f004e8ee",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "client.schema.delete_all()\n",
+    "client.schema.get()\n",
+    "schema = {\n",
+    "    \"classes\": [\n",
+    "        {\n",
+    "            \"class\": \"Paragraph\",\n",
+    "            \"description\": \"A written paragraph\",\n",
+    "            \"vectorizer\": \"text2vec-openai\",\n",
+    "              \"moduleConfig\": {\n",
+    "                \"text2vec-openai\": {\n",
+    "                  \"model\": \"babbage\",\n",
+    "                  \"type\": \"text\"\n",
+    "                }\n",
+    "              },\n",
+    "            \"properties\": [\n",
+    "                {\n",
+    "                    \"dataType\": [\"text\"],\n",
+    "                    \"description\": \"The content of the paragraph\",\n",
+    "                    \"moduleConfig\": {\n",
+    "                        \"text2vec-openai\": {\n",
+    "                          \"skip\": False,\n",
+    "                          \"vectorizePropertyName\": False\n",
+    "                        }\n",
+    "                      },\n",
+    "                    \"name\": \"content\",\n",
+    "                },\n",
+    "            ],\n",
+    "        },\n",
+    "    ]\n",
+    "}\n",
+    "\n",
+    "client.schema.create(schema)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ef6d5d04",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "vectorstore = Weaviate(client, \"Paragraph\", \"content\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "06e8c1ed",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "query = \"What did the president say about Ketanji Brown Jackson\"\n",
+    "docs = vectorstore.similarity_search(query)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "38b86be6",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(docs[0].page_content)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a359ed74",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.9.1"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}