langchain-deepseek 0.0.1

🚀 Langchain-Deepseek: Using the deepseek model in langchain

• Install from source (Recommend)

cd langchain-deepseek
pip install -e .

• Install from PyPI

pip install langchain-deepseek

Quick Start

• All the code can be found in the examples
• Set DeepSeek API key in environment if using DeepSeek models: export DEEPSEEK_API_KEY="sk-...".
• Maybe you can try loading environment variables like this. Create a new .env file

DEEPSEEK_API_KEY="sk-..."

from dotenv import load_dotenv, find_dotenv
load_dotenv(find_dotenv(), override=True)

It works with the Langchain library

from langchain_deepseek import ChatDeepSeekAI
from langchain_core.output_parsers import StrOutputParser

llm = ChatDeepSeekAI(
    model="deepseek-chat",
    api_key="sk-...",
)

output_parser = StrOutputParser()
chain = llm | output_parser
response = chain.invoke("太阳系有几大行星？")
print(response)

🌟Citation

@article{guo2025langchain-deepseek,
title={langchain-deepseek: Using the deepseek model in langchain},
author={Runke Zhong},
year={2025}
}

保持热爱，奔赴星海！

这个世界上唯有两样东西能让我们的心灵感到深深的震撼：一是我们头上灿烂的星空，一是我们内心崇高的道德法则