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import gradio as gr |
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import langchain, openai, os, time, wandb |
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from langchain.chains import LLMChain, RetrievalQA |
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from langchain.chat_models import ChatOpenAI |
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from langchain.document_loaders import PyPDFLoader, WebBaseLoader |
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from langchain.document_loaders.blob_loaders.youtube_audio import YoutubeAudioLoader |
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from langchain.document_loaders.generic import GenericLoader |
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from langchain.document_loaders.parsers import OpenAIWhisperParser |
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from langchain.embeddings.openai import OpenAIEmbeddings |
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from langchain.prompts import PromptTemplate |
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from langchain.text_splitter import RecursiveCharacterTextSplitter |
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from langchain.vectorstores import Chroma |
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from langchain.vectorstores import MongoDBAtlasVectorSearch |
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from pymongo import MongoClient |
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from wandb.sdk.data_types.trace_tree import Trace |
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from dotenv import load_dotenv, find_dotenv |
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_ = load_dotenv(find_dotenv()) |
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WANDB_API_KEY = os.environ["WANDB_API_KEY"] |
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MONGODB_URI = os.environ["MONGODB_ATLAS_CLUSTER_URI"] |
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client = MongoClient(MONGODB_URI) |
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MONGODB_DB_NAME = "langchain_db" |
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MONGODB_COLLECTION_NAME = "gpt-4" |
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MONGODB_COLLECTION = client[MONGODB_DB_NAME][MONGODB_COLLECTION_NAME] |
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MONGODB_INDEX_NAME = "default" |
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description = os.environ["DESCRIPTION"] |
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config = { |
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"chunk_overlap": 150, |
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"chunk_size": 1500, |
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"k": 3, |
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"model": "gpt-4", |
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"temperature": 0, |
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} |
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langchain.verbose = True |
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template = """If you don't know the answer, just say that you don't know, don't try to make up an answer. Keep the answer as concise as possible. Always say "Thanks for using the 🧠 app - Bernd" at the end of the answer. """ |
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llm_template = "Answer the question at the end. " + template + "Question: {question} Helpful Answer: " |
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rag_template = "Use the following pieces of context to answer the question at the end. " + template + "{context}. Question: {question} Helpful Answer: " |
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LLM_CHAIN_PROMPT = PromptTemplate(input_variables = ["question"], template = llm_template) |
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RAG_CHAIN_PROMPT = PromptTemplate(input_variables = ["context", "question"], template = rag_template) |
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CHROMA_DIR = "/data/chroma" |
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YOUTUBE_DIR = "/data/youtube" |
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PDF_URL = "https://arxiv.org/pdf/2303.08774.pdf" |
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WEB_URL = "https://openai.com/research/gpt-4" |
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YOUTUBE_URL_1 = "https://www.youtube.com/watch?v=--khbXchTeE" |
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YOUTUBE_URL_2 = "https://www.youtube.com/watch?v=hdhZwyf24mE" |
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YOUTUBE_URL_3 = "https://www.youtube.com/watch?v=vw-KWfKwvTQ" |
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def document_loading_splitting(): |
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docs = [] |
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loader = PyPDFLoader(PDF_URL) |
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docs.extend(loader.load()) |
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loader = WebBaseLoader(WEB_URL) |
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docs.extend(loader.load()) |
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loader = GenericLoader(YoutubeAudioLoader([YOUTUBE_URL_1, |
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YOUTUBE_URL_2, |
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YOUTUBE_URL_3], YOUTUBE_DIR), |
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OpenAIWhisperParser()) |
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docs.extend(loader.load()) |
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text_splitter = RecursiveCharacterTextSplitter(chunk_overlap = config["chunk_overlap"], |
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chunk_size = config["chunk_size"]) |
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splits = text_splitter.split_documents(docs) |
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return splits |
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def document_storage_chroma(splits): |
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Chroma.from_documents(documents = splits, |
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embedding = OpenAIEmbeddings(disallowed_special = ()), |
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persist_directory = CHROMA_DIR) |
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def document_storage_mongodb(splits): |
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MongoDBAtlasVectorSearch.from_documents(documents = splits, |
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embedding = OpenAIEmbeddings(disallowed_special = ()), |
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collection = MONGODB_COLLECTION, |
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index_name = MONGODB_INDEX_NAME) |
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def document_retrieval_chroma(llm, prompt): |
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db = Chroma(embedding_function = OpenAIEmbeddings(), |
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persist_directory = CHROMA_DIR) |
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return db |
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def document_retrieval_mongodb(llm, prompt): |
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db = MongoDBAtlasVectorSearch.from_connection_string(MONGODB_URI, |
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MONGODB_DB_NAME + "." + MONGODB_COLLECTION_NAME, |
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OpenAIEmbeddings(disallowed_special = ()), |
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index_name = MONGODB_INDEX_NAME) |
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return db |
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def llm_chain(llm, prompt): |
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llm_chain = LLMChain(llm = llm, prompt = LLM_CHAIN_PROMPT) |
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completion = llm_chain.run({"question": prompt}) |
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return completion |
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def rag_chain(llm, prompt, db): |
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rag_chain = RetrievalQA.from_chain_type(llm, |
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chain_type_kwargs = {"prompt": RAG_CHAIN_PROMPT}, |
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retriever = db.as_retriever(search_kwargs = {"k": config["k"]}), |
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return_source_documents = True) |
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completion = rag_chain({"query": prompt}) |
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return completion |
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def wandb_trace(rag_option, prompt, completion, status_msg, start_time_ms, end_time_ms): |
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wandb.init(project = "openai-llm-rag") |
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trace = Trace( |
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kind = "chain", |
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name = "LLMChain" if (rag_option == "Off") else "RetrievalQA", |
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status_code = "SUCCESS" if (str(status_msg) == "") else "ERROR", |
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status_message = str(status_msg), |
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metadata={ |
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"chunk_overlap": "" if (rag_option == "Off") else config["chunk_overlap"], |
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"chunk_size": "" if (rag_option == "Off") else config["chunk_size"], |
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"k": "" if (rag_option == "Off") else config["k"], |
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"model": config["model"], |
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"temperature": config["temperature"], |
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}, |
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inputs = {"rag_option": rag_option if (str(status_msg) == "") else "", |
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"prompt": str(prompt if (str(status_msg) == "") else ""), |
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"prompt_template": str((llm_template if (rag_option == "Off") else rag_template) if (str(status_msg) == "") else "")}, |
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outputs = {"completion": str(completion)}, |
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start_time_ms = start_time_ms, |
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end_time_ms = end_time_ms |
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) |
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trace.log("test") |
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wandb.finish() |
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def invoke(openai_api_key, rag_option, prompt): |
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if (openai_api_key == ""): |
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raise gr.Error("OpenAI API Key is required.") |
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if (rag_option is None): |
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raise gr.Error("Retrieval Augmented Generation is required.") |
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if (prompt == ""): |
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raise gr.Error("Prompt is required.") |
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completion = "" |
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result = "" |
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status_msg = "" |
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try: |
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start_time_ms = round(time.time() * 1000) |
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llm = ChatOpenAI(model_name = config["model"], |
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openai_api_key = openai_api_key, |
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temperature = config["temperature"]) |
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if (rag_option == "Chroma"): |
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db = document_retrieval_chroma(llm, prompt) |
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completion = rag_chain(llm, prompt, db) |
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result = completion["result"] |
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elif (rag_option == "MongoDB"): |
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db = document_retrieval_mongodb(llm, prompt) |
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completion = rag_chain(llm, prompt, db) |
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result = completion["result"] |
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else: |
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result = llm_chain(llm, prompt) |
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completion = result |
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except Exception as e: |
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status_msg = e |
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raise gr.Error(e) |
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finally: |
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end_time_ms = round(time.time() * 1000) |
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wandb_trace(rag_option, prompt, completion, status_msg, start_time_ms, end_time_ms) |
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return result |
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gr.close_all() |
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demo = gr.Interface(fn=invoke, |
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inputs = [gr.Textbox(label = "OpenAI API Key", value = "sk-", lines = 1), |
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gr.Radio(["Off", "Chroma", "MongoDB"], label="Retrieval Augmented Generation", value = "Off"), |
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gr.Textbox(label = "Prompt", value = "What is GPT-4?", lines = 1)], |
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outputs = [gr.Textbox(label = "Completion", lines = 1)], |
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title = "Generative AI - LLM & RAG", |
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description = description) |
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demo.launch() |
