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import gradio as gr
from transformers import TextIteratorStreamer
from threading import Thread
from transformers import StoppingCriteria, StoppingCriteriaList
import torch
import spaces
import os
model_name = "microsoft/Phi-3-medium-128k-instruct"
from transformers import AutoModelForCausalLM, AutoTokenizer
model = AutoModelForCausalLM.from_pretrained(model_name, device_map='cuda', torch_dtype=torch.float16, trust_remote_code=True
)
tokenizer = AutoTokenizer.from_pretrained(model_name)
class StopOnTokens(StoppingCriteria):
def __call__(self, input_ids: torch.LongTensor, scores: torch.FloatTensor, **kwargs) -> bool:
stop_ids = [29, 0]
for stop_id in stop_ids:
if input_ids[0][-1] == stop_id:
return True
return False
model.to('cuda')
@spaces.GPU(duration=300)
def predict(message, history, temperature, max_tokens, top_p, top_k):
history_transformer_format = history + [[message, ""]]
stop = StopOnTokens()
messages = "".join(["".join(["\n<|end|>\n<|user|>\n"+item[0], "\n<|end|>\n<|assistant|>\n"+item[1]]) for item in history_transformer_format])
model_inputs = tokenizer([messages], return_tensors="pt").to("cuda")
streamer = TextIteratorStreamer(tokenizer, timeout=300., skip_prompt=True, skip_special_tokens=True)
generate_kwargs = dict(
model_inputs,
streamer=streamer,
max_new_tokens=max_tokens,
do_sample=True,
top_p=top_p,
top_k=top_k,
temperature=temperature,
stopping_criteria=StoppingCriteriaList([stop])
)
t = Thread(target=model.generate, kwargs=generate_kwargs)
t.start()
partial_message = ""
for new_token in streamer:
if new_token != '<':
partial_message += new_token
yield partial_message
demo = gr.ChatInterface(
fn=predict,
title="Phi-3-medium-128k-instruct",
additional_inputs=[
gr.Slider(0.1, 0.9, value=0.7, label="Temperature"),
gr.Slider(512, 8192, value=4096, label="Max Tokens"),
gr.Slider(0.1, 0.9, value=0.7, label="top_p"
),
gr.Slider(10, 90, value=40, label="top_k"),
]
)
demo.launch(share=True)
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