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Update app.py
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app.py
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import gradio as gr
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from datasets import load_dataset
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import os
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import spaces
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from transformers import AutoModelForCausalLM, AutoTokenizer, TextIteratorStreamer
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import torch
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from threading import Thread
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from sentence_transformers import SentenceTransformer
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from datasets import load_dataset
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import time
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token = os.environ["HF_TOKEN"]
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model = AutoModelForCausalLM.from_pretrained(
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"google/gemma-7b-it",
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# torch_dtype=torch.float16 if torch.cuda.is_available() else torch.float32,
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torch_dtype=torch.float16,
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token=token,
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)
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tokenizer = AutoTokenizer.from_pretrained("google/gemma-7b-it", token=token)
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device = torch.device("cuda")
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model = model.to(device)
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RAG = SentenceTransformer("mixedbread-ai/mxbai-embed-large-v1")
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TOP_K = 1
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HEADER = "\n# RESOURCES:\n"
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# prepare data
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# since data is too big we will only select the first 3K lines
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data = load_dataset("not-lain/wikipedia-small-3000-embedded", split="train")
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# index dataset
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data.add_faiss_index("embedding")
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def search(query: str, k: int = TOP_K):
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embedded_query = RAG.encode(query)
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scores, retrieved_examples = data.get_nearest_examples(
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"embedding", embedded_query, k=k
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)
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return retrieved_examples
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def prepare_prompt(query, retrieved_examples):
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prompt = (
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f"Query: {query}\nContinue to answer the query in short sentences by using the Search Results:\n"
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)
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urls = []
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titles = retrieved_examples["title"][::-1]
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texts = retrieved_examples["text"][::-1]
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urls = retrieved_examples["url"][::-1]
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titles = titles[::-1]
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for i in range(TOP_K):
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prompt += f"* {texts[i]}\n"
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return prompt, zip(titles, urls)
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@spaces.GPU(duration=150)
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def talk(message, history):
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print("message ", message)
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print("searching dataset ...")
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retrieved_examples = search(message)
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print("preparing prompt ...")
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message, metadata = prepare_prompt(message, retrieved_examples)
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resources = HEADER
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print("preparing metadata ...")
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for title, url in metadata:
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resources += f"[{title}]({url}), "
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print("preparing chat template ...")
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chat = []
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for item in history:
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chat.append({"role": "user", "content": item[0]})
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cleaned_past = item[1].split(HEADER)[0]
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chat.append({"role": "assistant", "content": cleaned_past})
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chat.append({"role": "user", "content": message})
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messages = tokenizer.apply_chat_template(
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chat, tokenize=False, add_generation_prompt=True
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)
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print("chat template prepared, ", messages)
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print("tokenizing input ...")
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# Tokenize the messages string
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model_inputs = tokenizer([messages], return_tensors="pt").to(device)
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streamer = TextIteratorStreamer(
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tokenizer, timeout=10.0, skip_prompt=True, skip_special_tokens=True
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)
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generate_kwargs = dict(
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model_inputs,
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streamer=streamer,
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max_new_tokens=1024,
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do_sample=True,
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top_p=0.95,
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top_k=1000,
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temperature=0.75,
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num_beams=1,
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)
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print("initializing thread ...")
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t = Thread(target=model.generate, kwargs=generate_kwargs)
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t.start()
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time.sleep(1)
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# Initialize an empty string to store the generated text
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partial_text = ""
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i = 0
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while t.is_alive():
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try:
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for new_text in streamer:
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if new_text is not None:
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partial_text += new_text
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yield partial_text
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except Exception as e:
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print(f"retry number {i}\n LOGS:\n")
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i+=1
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print(e, e.args)
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partial_text += resources
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yield partial_text
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TITLE = "# RAG"
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@@ -127,6 +18,8 @@ Resources used to build this project :
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* chatbot : https://huggingface.co/google/gemma-7b-it
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If you want to support my work consider clicking on the heart react button ❤️🤗
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"""
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import gradio as gr
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def talk(message, history):
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return "hi"
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TITLE = "# RAG"
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* chatbot : https://huggingface.co/google/gemma-7b-it
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If you want to support my work consider clicking on the heart react button ❤️🤗
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+
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(testing the ui)
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"""
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