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import os
import json
import subprocess
from threading import Thread
import torch
import spaces
import gradio as gr
from transformers import AutoModelForCausalLM, AutoTokenizer, BitsAndBytesConfig, TextIteratorStreamer
subprocess.run('pip install flash-attn --no-build-isolation', env={'FLASH_ATTENTION_SKIP_CUDA_BUILD': "TRUE"}, shell=True)
MODEL_ID = os.environ.get("MODEL_ID")
CHAT_TEMPLATE = os.environ.get("CHAT_TEMPLATE")
MODEL_NAME = MODEL_ID.split("/")[-1]
CONTEXT_LENGTH = int(os.environ.get("CONTEXT_LENGTH"))
COLOR = os.environ.get("COLOR")
EMOJI = os.environ.get("EMOJI")
DESCRIPTION = os.environ.get("DESCRIPTION")
@spaces.GPU()
def predict(message, history, system_prompt, temperature, max_new_tokens, top_k, repetition_penalty, top_p):
# Format history with a given chat template
if CHAT_TEMPLATE == "ChatML":
stop_tokens = ["<|endoftext|>", "<|im_end|>"]
instruction = '<|im_start|>system\n' + system_prompt + '\n<|im_end|>\n'
for human, assistant in history:
instruction += '<|im_start|>user\n' + human + '\n<|im_end|>\n<|im_start|>assistant\n' + assistant
instruction += '\n<|im_start|>user\n' + message + '\n<|im_end|>\n<|im_start|>assistant\n'
elif CHAT_TEMPLATE == "Mistral Instruct":
stop_tokens = ["</s>", "[INST]", "[INST] ", "<s>", "[/INST]", "[/INST] "]
instruction = '<s>[INST] ' + system_prompt
for human, assistant in history:
instruction += human + ' [/INST] ' + assistant + '</s>[INST]'
instruction += ' ' + message + ' [/INST]'
else:
raise Exception("Incorrect chat template, select 'ChatML' or 'Mistral Instruct'")
print(instruction)
streamer = TextIteratorStreamer(tokenizer, skip_prompt=True, skip_special_tokens=True)
enc = tokenizer([instruction], return_tensors="pt", padding=True, truncation=True)
input_ids, attention_mask = enc.input_ids, enc.attention_mask
if input_ids.shape[1] > CONTEXT_LENGTH:
input_ids = input_ids[:, -CONTEXT_LENGTH:]
generate_kwargs = dict(
{"input_ids": input_ids.to(device), "attention_mask": attention_mask.to(device)},
streamer=streamer,
do_sample=True,
temperature=temperature,
max_new_tokens=max_new_tokens,
top_k=top_k,
repetition_penalty=repetition_penalty,
top_p=top_p
)
t = Thread(target=model.generate, kwargs=generate_kwargs)
t.start()
outputs = []
for new_token in streamer:
outputs.append(new_token)
if new_token in stop_tokens:
break
yield "".join(outputs)
# Load model
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
quantization_config = BitsAndBytesConfig(
load_in_8bit=True,
# bnb_4bit_compute_dtype=torch.bfloat16
)
tokenizer = AutoTokenizer.from_pretrained(MODEL_ID)
model = AutoModelForCausalLM.from_pretrained(
MODEL_ID,
device_map="auto",
quantization_config=quantization_config,
attn_implementation="flash_attention_2",
)
# Create Gradio interface
gr.ChatInterface(
predict,
title=EMOJI + " " + MODEL_NAME,
description=DESCRIPTION,
examples=[
["Calculate the volume of a sphere with a radius of 5 centimeters."],
["Describe a dystopian world where water is more valuable than gold."],
["Tips for first-time travelers to Japan."],
["Write a Python function to check if a number is prime."],
["Explain the process of photosynthesis to a 10-year-old."],
["Create a story about a lost civilization found beneath the Pacific Ocean."]
],
additional_inputs_accordion=gr.Accordion(label="⚙️ Parameters", open=False),
additional_inputs=[
gr.Textbox("Perform the task to the best of your ability.", label="System prompt"),
gr.Slider(0, 1, 0.8, label="Temperature"),
gr.Slider(128, 4096, 1024, label="Max new tokens"),
gr.Slider(1, 80, 40, label="Top K sampling"),
gr.Slider(0, 2, 1.1, label="Repetition penalty"),
gr.Slider(0, 1, 0.95, label="Top P sampling"),
],
theme=gr.themes.Soft(primary_hue=COLOR),
).queue().launch()
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