Sean-Case
Added reference to source on app. Minor text changes.
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# # Load in packages
# +
import os
from typing import TypeVar
from langchain.embeddings import HuggingFaceEmbeddings, HuggingFaceInstructEmbeddings
from langchain.vectorstores import FAISS
#PandasDataFrame: type[pd.core.frame.DataFrame]
PandasDataFrame = TypeVar('pd.core.frame.DataFrame')
# Disable cuda devices if necessary
#os.environ['CUDA_VISIBLE_DEVICES'] = '-1'
#from chatfuncs.chatfuncs import *
import chatfuncs.ingest as ing
## Load preset embeddings and vectorstore
embeddings_name = "thenlper/gte-base"
def load_embeddings(embeddings_name = "thenlper/gte-base"):
if embeddings_name == "hkunlp/instructor-large":
embeddings_func = HuggingFaceInstructEmbeddings(model_name=embeddings_name,
embed_instruction="Represent the paragraph for retrieval: ",
query_instruction="Represent the question for retrieving supporting documents: "
)
else:
embeddings_func = HuggingFaceEmbeddings(model_name=embeddings_name)
global embeddings
embeddings = embeddings_func
return embeddings
def get_faiss_store(faiss_vstore_folder,embeddings):
import zipfile
with zipfile.ZipFile(faiss_vstore_folder + '/' + faiss_vstore_folder + '.zip', 'r') as zip_ref:
zip_ref.extractall(faiss_vstore_folder)
faiss_vstore = FAISS.load_local(folder_path=faiss_vstore_folder, embeddings=embeddings)
os.remove(faiss_vstore_folder + "/index.faiss")
os.remove(faiss_vstore_folder + "/index.pkl")
global vectorstore
vectorstore = faiss_vstore
return vectorstore
import chatfuncs.chatfuncs as chatf
chatf.embeddings = load_embeddings(embeddings_name)
chatf.vectorstore = get_faiss_store(faiss_vstore_folder="faiss_embedding",embeddings=globals()["embeddings"])
def docs_to_faiss_save(docs_out:PandasDataFrame, embeddings=embeddings):
print(f"> Total split documents: {len(docs_out)}")
print(docs_out)
vectorstore_func = FAISS.from_documents(documents=docs_out, embedding=embeddings)
'''
#with open("vectorstore.pkl", "wb") as f:
#pickle.dump(vectorstore, f)
'''
#if Path(save_to).exists():
# vectorstore_func.save_local(folder_path=save_to)
#else:
# os.mkdir(save_to)
# vectorstore_func.save_local(folder_path=save_to)
global vectorstore
vectorstore = vectorstore_func
chatf.vectorstore = vectorstore
out_message = "Document processing complete"
#print(out_message)
#print(f"> Saved to: {save_to}")
return out_message
# Gradio chat
import gradio as gr
block = gr.Blocks(css=".gradio-container {background-color: black}")
with block:
#with gr.Row():
gr.Markdown("<h1><center>Lightweight PDF / web page QA bot</center></h1>")
gr.Markdown("Chat with a document (alpha). By default the Lambeth Borough Plan '[Lambeth 2030 : Our Future, Our Lambeth](https://www.lambeth.gov.uk/better-fairer-lambeth/projects/lambeth-2030-our-future-our-lambeth)' is loaded. If you want to talk about another document or web page (feature temporarily disabled), please select below. The chatbot will not answer questions where answered can't be found on the website. If switching topic, please click the 'New topic' button as the bot will assume follow up questions are linked to the first. Sources are shown underneath the chat area.\n\nWarnings: This is a public app. Please ensure that the document you upload is not sensitive is any way as other users may see it! Also, please note that LLM chatbots may give incomplete or incorrect information, so please use with care.")
current_source = gr.Textbox(label="Current data source that is loaded into the app", value="Lambeth_2030-Our_Future_Our_Lambeth.pdf")
with gr.Tab("Chatbot"):
with gr.Row():
chatbot = gr.Chatbot(height=300)
sources = gr.HTML(value = "Source paragraphs where I looked for answers will appear here", height=300)
with gr.Row():
message = gr.Textbox(
label="What's your question?",
lines=1,
)
submit = gr.Button(value="Send message", variant="secondary", scale = 1)
examples_set = gr.Examples(label="Examples for the Lambeth Borough Plan",
examples=[
"What were the five pillars of the previous borough plan?",
"What is the vision statement for Lambeth?",
"What are the commitments for Lambeth?",
"What are the 2030 outcomes for Lambeth?"],
inputs=message,
)
with gr.Row():
current_topic = gr.Textbox(label="Keywords related to current conversation topic. If you want to talk about something else, press 'New topic'", placeholder="Keywords related to the conversation topic will appear here")
clear = gr.Button(value="New topic", variant="secondary", scale=0)
with gr.Tab("Load in a different PDF file or web page to chat"):
with gr.Accordion("PDF file", open = False):
in_pdf = gr.File(label="Upload pdf", file_count="multiple", file_types=['.pdf'])
load_pdf = gr.Button(value="Load in file", variant="secondary", scale=0)
with gr.Accordion("Web page", open = False):
with gr.Row():
in_web = gr.Textbox(label="Enter webpage url")
in_div = gr.Textbox(label="(Advanced) Webpage div for text extraction", value="p", placeholder="p")
load_web = gr.Button(value="Load in webpage", variant="secondary", scale=0)
ingest_embed_out = gr.Textbox(label="File/webpage preparation progress")
gr.HTML(
"<center>Powered by Flan Alpaca and Langchain</a></center>"
)
ingest_text = gr.State()
ingest_metadata = gr.State()
ingest_docs = gr.State()
embeddings_state = gr.State()
vectorstore_state = gr.State()
chat_history_state = gr.State()
instruction_prompt_out = gr.State()
#def hide_examples():
# return gr.Examples.update(visible=False)
# Load in a pdf
load_pdf_click = load_pdf.click(ing.parse_file, inputs=[in_pdf], outputs=[ingest_text, current_source]).\
then(ing.text_to_docs, inputs=[ingest_text], outputs=[ingest_docs]).\
then(docs_to_faiss_save, inputs=[ingest_docs], outputs=ingest_embed_out) # #then(load_embeddings, outputs=[embeddings_state]).\
#then(hide_examples)
# Load in a webpage
load_web_click = load_web.click(ing.parse_html, inputs=[in_web, in_div], outputs=[ingest_text, ingest_metadata, current_source]).\
then(ing.html_text_to_docs, inputs=[ingest_text, ingest_metadata], outputs=[ingest_docs]).\
then(docs_to_faiss_save, inputs=[ingest_docs], outputs=ingest_embed_out)
#then(hide_examples)
# Load in a webpage
# Click/enter to send message action
response_click = submit.click(chatf.get_history_sources_final_input_prompt, inputs=[message, chat_history_state, current_topic], outputs=[chat_history_state, sources, instruction_prompt_out], queue=False).\
then(chatf.turn_off_interactivity, inputs=[message, chatbot], outputs=[message, chatbot], queue=False).\
then(chatf.produce_streaming_answer_chatbot_hf, inputs=[chatbot, instruction_prompt_out], outputs=chatbot)
response_click.then(chatf.highlight_found_text, [chatbot, sources], [sources]).\
then(chatf.add_inputs_answer_to_history,[message, chatbot, current_topic], [chat_history_state, current_topic]).\
then(lambda: gr.update(interactive=True), None, [message], queue=False)
response_enter = message.submit(chatf.get_history_sources_final_input_prompt, inputs=[message, chat_history_state, current_topic], outputs=[chat_history_state, sources, instruction_prompt_out], queue=False).\
then(chatf.turn_off_interactivity, inputs=[message, chatbot], outputs=[message, chatbot], queue=False).\
then(chatf.produce_streaming_answer_chatbot_hf, [chatbot, instruction_prompt_out], chatbot)
response_enter.then(chatf.highlight_found_text, [chatbot, sources], [sources]).\
then(chatf.add_inputs_answer_to_history,[message, chatbot, current_topic], [chat_history_state, current_topic]).\
then(lambda: gr.update(interactive=True), None, [message], queue=False)
# Clear box
clear.click(chatf.clear_chat, inputs=[chat_history_state, sources, message, current_topic], outputs=[chat_history_state, sources, message, current_topic])
clear.click(lambda: None, None, chatbot, queue=False)
block.queue(concurrency_count=1).launch(debug=True)
# -