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| import os | |
| import datetime | |
| import pickle | |
| import gradio as gr | |
| import langchain | |
| from langchain.llms import HuggingFaceHub | |
| from chain import get_new_chain | |
| api_token = os.environ["HF_TOKEN"] | |
| def get_faiss_store(): | |
| with open("docs.pkl", "rb") as f: | |
| faiss_store = pickle.load(f) | |
| return faiss_store | |
| def load_model(): | |
| print(langchain.__file__) | |
| vectorstore = get_faiss_store() | |
| flan_ul = HuggingFaceHub(repo_id="google/flan-ul2", | |
| model_kwargs={"temperature":0.1, "max_new_tokens":200}, | |
| huggingfacehub_api_token=api_token) | |
| qa_chain = get_new_chain(vectorstore, flan_ul) | |
| return qa_chain | |
| def chat(inp, agent): | |
| result = [] | |
| if agent is None: | |
| result.append((inp, "Please wait for model to load (3-5 seconds)")) | |
| return result | |
| print("\n==== date/time: " + str(datetime.datetime.now()) + " ====") | |
| print("inp: " + inp) | |
| result = [] | |
| output = agent({"question": inp}) | |
| answer = output["answer"] | |
| result.append((inp, answer)) | |
| print(result) | |
| return result | |
| block = gr.Blocks(css=".gradio-container {background-color: lightgray}") | |
| with block: | |
| with gr.Row(): | |
| gr.Markdown("<h3><center>PotterChat</center></h3><p>Ask questions about the Harry Potter Books, Powered by Flan-UL2</p>") | |
| chatbot = gr.Chatbot() | |
| with gr.Row(): | |
| message = gr.Textbox( | |
| label="What's your question?", | |
| placeholder="Who was Harry's godfather?", | |
| lines=1, | |
| ) | |
| submit = gr.Button(value="Send", variant="secondary").style(full_width=False) | |
| gr.Examples( | |
| examples=[ | |
| "Which house in Hogwarts was Harry in?", | |
| "Who were Harry's best friends?", | |
| "Who taught Potions at Hogwarts?", | |
| ], | |
| inputs=message, | |
| ) | |
| gr.HTML( | |
| """ | |
| This simple application uses Langchain, an open-source LLM, and FAISS to do Q&A over the Harry Potter books.""" | |
| ) | |
| gr.HTML( | |
| "<center>Powered by <a href='huggingface.co'>Hugging Face 🤗</a> and <a href='https://github.com/hwchase17/langchain'>LangChain 🦜️🔗</a></center>" | |
| ) | |
| # state = gr.State() | |
| agent_state = gr.State() | |
| block.load(load_model, inputs=None, outputs=[agent_state]) | |
| # submit.click(chat, inputs=[message, state, agent_state], outputs=[chatbot, state]) | |
| # message.submit(chat, inputs=[message, state, agent_state], outputs=[chatbot, state]) | |
| submit.click(chat, inputs=[message, agent_state], outputs=[chatbot]) | |
| message.submit(chat, inputs=[message, agent_state], outputs=[chatbot]) | |
| block.launch(debug=True) |