import getpass
import os

if not os.environ.get("DEEPSEEK_API_KEY"):
  os.environ["DEEPSEEK_API_KEY"] = os.environ['DASHSCOPE_API_KEY']

from langchain.chat_models import init_chat_model

model = init_chat_model("deepseek-chat", model_provider="deepseek")

messages = [
    {"role": "system", "content": "You are a helpful assistant."},
    {"role": "user", "content": "你是谁？"}]
response = model.invoke(messages)
print(response.model_dump_json())