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import json
import torch
import streamlit as st
from transformers import AutoModelForCausalLM, AutoTokenizer
from transformers.generation.utils import GenerationConfig
st.set_page_config(page_title="Baichuan-13B-Chat")
st.title("Baichuan-13B-Chat")
@st.cache_resource
def init_model():
model = AutoModelForCausalLM.from_pretrained(
"baichuan-inc/Baichuan-13B-Chat",
torch_dtype=torch.float16,
device_map="auto",
trust_remote_code=True
)
model.generation_config = GenerationConfig.from_pretrained(
"baichuan-inc/Baichuan-13B-Chat"
)
tokenizer = AutoTokenizer.from_pretrained(
"baichuan-inc/Baichuan-13B-Chat",
use_fast=False,
trust_remote_code=True
)
return model, tokenizer
def clear_chat_history():
del st.session_state.messages
# def init_chat_history():
# with st.chat_message("assistant", avatar='🤖'):
# st.markdown("您好，我是百川大模型，很高兴为您服务🥰")
# if "messages" in st.session_state:
# for message in st.session_state.messages:
# avatar = '🧑💻' if message["role"] == "user" else '🤖'
# with st.chat_message(message["role"], avatar=avatar):
# st.markdown(message["content"])
# else:
# st.session_state.messages = []
# return st.session_state.messages
# 初始化聊天历史
def init_chat_history():
# 显示机器人的欢迎语
st.write("🤖: 您好，我是百川大模型，很高兴为您服务🥰")
# 如果会话状态中有消息记录，就显示出来
if "messages" in st.session_state:
for message in st.session_state.messages:
# 根据角色显示不同的头像
avatar = '🧑💻' if message["role"] == "user" else '🤖'
# 用st.write或st.markdown显示消息内容
st.write(f"{avatar}: {message['content']}")
else:
# 如果没有消息记录，就初始化一个空列表
st.session_state.messages = []
return st.session_state.messages
def main():
model, tokenizer = init_model()
messages = init_chat_history()
if prompt := st.chat_input("Shift + Enter 换行, Enter 发送"):
with st.chat_message("user", avatar='🧑💻'):
st.markdown(prompt)
messages.append({"role": "user", "content": prompt})
print(f"[user] {prompt}", flush=True)
with st.chat_message("assistant", avatar='🤖'):
placeholder = st.empty()
for response in model.chat(tokenizer, messages, stream=True):
placeholder.markdown(response)
if torch.backends.mps.is_available():
torch.mps.empty_cache()
messages.append({"role": "assistant", "content": response})
print(json.dumps(messages, ensure_ascii=False), flush=True)
st.button("清空对话", on_click=clear_chat_history)
if __name__ == "__main__":
main()
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