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Merge pull request #36 from jcodella/main
updated LangChain semantic caching example
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‎Python/CosmosDB-MongoDB-vCore/Semantic-Caching-Tutorial.ipynb‎

Lines changed: 103 additions & 55 deletions
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@@ -1,5 +1,33 @@
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{
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"cells": [
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{
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"cell_type": "markdown",
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"id": "74e01527",
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"metadata": {},
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"source": [
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"# Introduction\n",
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"\n",
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"In this tutorial, we'll demonstrate how to leverage a semantic caching with Azure Cosmos DB for MongoDB and LangChain.\n",
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"\n",
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"[Learn more here from the LangChain docs.](https://python.langchain.com/docs/integrations/llms/llm_caching#azure-cosmos-db-semantic-cache)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "c19c036d",
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"metadata": {},
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"outputs": [],
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"source": [
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"# ! pip install langchain\n",
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"# ! pip install langchain_openai\n",
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"# ! pip install langchain_community\n",
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"# ! pip install pymongo\n",
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"# ! pip install python-dotenv\n",
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"# ! pip install azure-core\n",
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"# ! pip install azure-cosmos"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
@@ -17,13 +45,13 @@
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" CosmosDBVectorSearchType,\n",
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")\n",
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"\n",
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"from langchain_openai import OpenAIEmbeddings, AzureOpenAIEmbeddings\n",
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"from langchain_openai import OpenAI, AzureOpenAI\n",
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"from langchain.globals import set_llm_cache\n",
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"from langchain.chains import ConversationalRetrievalChain, LLMChain\n",
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"from langchain.prompts import PromptTemplate\n",
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"\n",
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"from azure.core.exceptions import AzureError\n",
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"from azure.core.credentials import AzureKeyCredential\n",
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"from langchain_openai import AzureChatOpenAI, AzureOpenAIEmbeddings\n",
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"from langchain.globals import set_llm_cache\n",
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"\n",
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"import pymongo\n",
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"from dotenv import load_dotenv"
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]
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},
@@ -42,7 +70,8 @@
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"\n",
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"COSMOS_MONGO_USER = config['cosmos_db_mongo_user']\n",
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"COSMOS_MONGO_PWD = config['cosmos_db_mongo_pwd']\n",
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"COSMOS_MONGO_SERVER = config['cosmos_db_mongo_server'] "
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"COSMOS_MONGO_SERVER = config['cosmos_db_mongo_server']\n",
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"DIMENSIONS = int(config['openai_embeddings_dimensions']) "
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]
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},
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{
@@ -57,7 +86,8 @@
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"\n",
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"CONNECTION_STRING = (\"mongodb+srv://\"+COSMOS_MONGO_USER+\":\"+COSMOS_MONGO_PWD+\"@\"+COSMOS_MONGO_SERVER+\"?tls=true&authMechanism=SCRAM-SHA-256&retrywrites=false&maxIdleTimeMS=120000\")\n",
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"\n",
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"DB_NAME, COLLECTION_NAME = NAMESPACE.split(\".\")"
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"DB_NAME, COLLECTION_NAME = NAMESPACE.split(\".\")\n",
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"mongo_client = pymongo.MongoClient(CONNECTION_STRING)\n"
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]
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},
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{
@@ -67,24 +97,66 @@
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"metadata": {},
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"outputs": [],
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"source": [
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"# Requires model version 0301 or more recent\n",
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"llm = AzureOpenAI(\n",
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" deployment_name=config['openai_completions_deployment'],\n",
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" model_name=config['openai_completions_model'],\n",
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" openai_api_key=config['openai_api_key'],\n",
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" azure_endpoint=config['openai_api_endpoint'],\n",
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" openai_api_version=config['openai_api_version'],\n",
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" n=2,\n",
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" best_of=2,\n",
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" cache=True)\n",
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"\n",
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"\n",
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"embeddings = AzureOpenAIEmbeddings(\n",
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" azure_deployment=config['openai_embeddings_deployment'],\n",
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" model=config['openai_embeddings_model'],\n",
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" openai_api_key=config['openai_api_key'],\n",
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" azure_endpoint=config['openai_api_endpoint'],\n",
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" openai_api_version=config['openai_api_version'])"
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"def init_llm_chain():\n",
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"\n",
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" # Clear old cache if it exists\n",
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" mongo_client[DB_NAME][COLLECTION_NAME].drop_indexes()\n",
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" mongo_client[DB_NAME].drop_collection(COLLECTION_NAME)\n",
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"\n",
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" # Define a template for the LLM prompt\n",
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" prompt_template = \"\"\"\n",
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" You are an upbeat AI assistant who is excited to help answer questions. \n",
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"\n",
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" Question: {question}\n",
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" If you don't know the answer, just say that you don't know, don't try to make up an answer.\n",
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" \"\"\"\n",
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" chatbot_prompt = PromptTemplate(\n",
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" template = prompt_template, input_variables = [\"question\", \"context\"])\n",
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"\n",
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" # Requires model version 0301 or more recent\n",
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" # Point to completions model deployed in Azure OpenAI\n",
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" llm = AzureChatOpenAI(\n",
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" deployment_name=config['openai_completions_deployment'],\n",
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" model_name=config['openai_completions_model'],\n",
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" api_key=config['openai_api_key'],\n",
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" azure_endpoint=config['openai_api_endpoint'],\n",
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" api_version=config['openai_api_version'],\n",
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" cache=True,\n",
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" n=1)\n",
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"\n",
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" # Point to embeddings model deployed in Azure OpenAI\n",
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" embeddings = AzureOpenAIEmbeddings(\n",
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" azure_deployment=config['openai_embeddings_deployment'],\n",
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" model=config['openai_embeddings_model'],\n",
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" api_key=config['openai_api_key'],\n",
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" azure_endpoint=config['openai_api_endpoint'],\n",
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" dimensions=DIMENSIONS)\n",
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"\n",
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" # Setup simple LLM chain\n",
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" llm_chain = LLMChain(llm = llm, prompt=chatbot_prompt)\n",
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"\n",
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" # Setup semantic cache for LLM\n",
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" num_lists = 1\n",
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" similarity_algorithm = CosmosDBSimilarityType.COS\n",
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" kind = CosmosDBVectorSearchType.VECTOR_IVF\n",
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"\n",
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" score_threshold = 0.9\n",
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"\n",
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" sem_cache = AzureCosmosDBSemanticCache(\n",
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" cosmosdb_connection_string=CONNECTION_STRING,\n",
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" cosmosdb_client=None,\n",
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" embedding=embeddings,\n",
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" database_name=DB_NAME,\n",
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" collection_name=COLLECTION_NAME,\n",
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" num_lists=num_lists,\n",
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" similarity=similarity_algorithm,\n",
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" kind=kind,\n",
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" dimensions=DIMENSIONS,\n",
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" score_threshold=score_threshold)\n",
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"\n",
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" set_llm_cache(sem_cache)\n",
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"\n",
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" return llm_chain"
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]
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},
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{
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},
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"outputs": [],
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"source": [
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"# Default value for these params\n",
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"num_lists = 1\n",
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"dimensions = 1536\n",
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"similarity_algorithm = CosmosDBSimilarityType.COS\n",
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"kind = CosmosDBVectorSearchType.VECTOR_IVF\n",
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"m = 16\n",
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"ef_construction = 64\n",
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"ef_search = 40\n",
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"score_threshold = 0.9\n",
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"\n",
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"set_llm_cache(\n",
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" AzureCosmosDBSemanticCache(\n",
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" cosmosdb_connection_string=CONNECTION_STRING,\n",
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" cosmosdb_client=None,\n",
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" embedding=embeddings,\n",
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" database_name=DB_NAME,\n",
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" collection_name=COLLECTION_NAME,\n",
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" num_lists=num_lists,\n",
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" similarity=similarity_algorithm,\n",
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" kind=kind,\n",
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" dimensions=dimensions,\n",
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" m=m,\n",
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" ef_construction=ef_construction,\n",
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" ef_search=ef_search,\n",
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" score_threshold=score_threshold )\n",
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")"
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"# Initialize llm chain\n",
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"llm_chain = init_llm_chain()"
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]
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},
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{
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"source": [
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"%%time\n",
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"# The first time, the quesiton/response is not yet cachced in Cosmos DB, so retrieval should be slower\n",
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"llm(\"Tell me about beer making\")"
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"llm_chain.invoke(\"Tell me something interesting about beer making\")"
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]
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},
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{
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"source": [
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"%%time\n",
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"# This quesiton/response is not yet cachced in Cosmos DB, so retrieval should be slower\n",
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"llm(\"Tell me a joke?\")"
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"llm_chain(\"Tell me a joke about tomatoes and food.\")"
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]
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},
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{
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"source": [
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"%%time\n",
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"# The second time, the quesiton/response is cached in Cosmos DB, so retrieval should be faster\n",
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"llm(\"Tell me about beer making\")"
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"llm_chain(\"Tell me something interesting about beer making\")"
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]
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},
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{
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"source": [
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"%%time\n",
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"# This question is semantically similar to the previous one within the score_threshold amount, so retrieval should be faster\n",
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"llm(\"How do I make beer?\")"
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"llm_chain(\"How do I make beer?\")"
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]
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}
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],

‎Python/CosmosDB-MongoDB-vCore/example.env‎

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cosmos_db_mongo_user = "sample"
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cosmos_db_mongo_pwd = "sample"
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cosmos_db_mongo_server = "sample_endpoint.com/"
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openai_api_endpoint = "sample_endpoint.com/"
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openai_api_key =
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cosmos_db_mongo_user = ""
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cosmos_db_mongo_pwd = ""
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cosmos_db_mongo_server = "yourcdbresource.mongocluster.cosmos.azure.com/"
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openai_api_endpoint = "https://your_endpoint.openai.azure.com/"
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openai_api_key = """
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openai_api_type = "azure"
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openai_api_version = "2023-05-15"
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openai_embeddings_deployment = "deployment_name"
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openai_embeddings_model = "model_type"
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openai_completions_deployment = "deployment_name"
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openai_completions_model = "model_type"
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openai_embeddings_deployment = "embedding-deployment-name"
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openai_embeddings_model = "embedding-model-type"
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openai_embeddings_dimensions = 1536
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openai_completions_deployment = "completions-deployment-name"
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openai_completions_model = "completions-model-type"

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