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import gradio as gr
import spaces
from threading import Thread
from torch import bfloat16
from transformers import Qwen2VLForConditionalGeneration, Qwen2VLProcessor, TextIteratorStreamer, AutoProcessor
from qwen_vl_utils import process_vision_info
model_path = "Pectics/Softie-VL-7B-250123"
model = Qwen2VLForConditionalGeneration.from_pretrained(
model_path,
torch_dtype=bfloat16,
attn_implementation="flash_attention_2",
device_map="auto",
)
min_pixels = 256 * 28 * 28
max_pixels = 1280 * 28 * 28
processor: Qwen2VLProcessor = AutoProcessor.from_pretrained(model_path, min_pixels=min_pixels, max_pixels=max_pixels)
@spaces.GPU
def infer(
messages,
max_tokens,
temperature,
top_p,
):
text_inputs = processor.apply_chat_template(messages, tokenize=False, add_generation_prompt=True)
image_inputs, video_inputs = process_vision_info(messages)
inputs = processor(
text=[text_inputs],
images=image_inputs,
videos=video_inputs,
padding=True,
return_tensors="pt",
).to("cuda")
streamer = TextIteratorStreamer(processor, skip_prompt=True, skip_special_tokens=True)
kwargs = dict(
**inputs,
streamer=streamer,
max_new_tokens=max_tokens,
temperature=temperature,
top_p=top_p,
)
thread = Thread(target=model.generate, kwargs=kwargs)
thread.start()
response = ""
for token in streamer:
response += token
yield response
def respond(
message,
history,
system_message,
max_tokens,
temperature,
top_p,
):
messages = [{"role": "system", "content": system_message}]
for m in history:
messages.append({"role": m["role"], "content": m["content"]})
messages.append({"role": "user", "content": message})
for response in infer(messages, max_tokens, temperature, top_p):
yield response
app = gr.ChatInterface(
respond,
type="messages",
additional_inputs=[
gr.Textbox(value="You are Softie, a helpful assistant.", label="系统设定"),
gr.Slider(minimum=1, maximum=2048, value=512, step=1, label="最大生成长度"),
gr.Slider(minimum=0.01, maximum=4.0, value=0.75, step=0.01, label="温度系数（Temperature）"),
gr.Slider(minimum=0.01, maximum=1.0, value=0.5, step=0.01, label="核取样系数（Top-p）"),
],
)
if __name__ == "__main__":
app.launch()
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