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import torch
from peft import PeftModel
import transformers
import gradio as gr
from transformers import GenerationConfig, LlamaForCausalLM, LlamaTokenizer
from transformers import Trainer
BASE_MODEL = "TheBloke/vicuna-7B-1.1-HF"
model = LlamaForCausalLM.from_pretrained(
BASE_MODEL,
torch_dtype=torch.float16,
load_in_8bit=True,
device_map = "auto",
offload_folder="./cache",
)
tokenizer = LlamaTokenizer.from_pretrained(BASE_MODEL)
tokenizer.pad_token_id = 0
tokenizer.padding_side = "left"
def format_prompt(prompt: str) -> str:
return f"### Human: {prompt}\n### Assistant:"
generation_config = GenerationConfig(
max_new_tokens=128,
temperature=0.2,
repetition_penalty=1.0,
)
def generate_text(prompt: str):
formatted_prompt = format_prompt(prompt)
inputs = tokenizer(
formatted_prompt,
padding=False,
add_special_tokens=False,
return_tensors="pt"
).to(model.device)
with torch.inference_mode():
tokens = model.generate(**inputs, generation_config=generation_config)
response = tokenizer.decode(tokens[0], skip_special_tokens=True)
assistant_index = response.find("### Assistant:") + len("### Assistant:")
return response[assistant_index:].strip()
iface = gr.Interface(
fn=generate_text,
inputs="text",
outputs="text",
title="Chatbot",
description="This vicuna app is using this model: https://huggingface.co/TheBloke/vicuna-7B-1.1-HF"
)
iface.launch()
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