[AI] 2. Langchain ChatUpstage 를 이용한 검증

1. langchain-upstage, python-dotenv 설치

# Upstage 인 경우
% pip install langchain-upstage python-dotenv

# OpenAI 인 경우
% pip install langchain-openai python-dotenv


Collecting langchain-upstage
  Downloading langchain_upstage-0.6.0-py3-none-any.whl (20 kB)
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[notice] A new release of pip is available: 23.0.1 -> 25.0.1
[notice] To update, run: pip install --upgrade pip
Note: you may need to restart the kernel to use updated packages.
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2. .env 파일 만들기.

vi .env
# Upstage 인 경우 UPSTAGE_API_KEY 가 기본 설정.
UPSTAGE_API_KEY=up_LXQMskwzMekt..........

# OpanAI 인 경우 OPENAI_API_KEY 가 기본 설정.
# OPENAI_API_KEY=sk-proj-qp7ZyK12kfZ9o........

3. 환경변수 로드

from dotenv import load_dotenv
load_dotenv()

4. 랭체인 선언

# OpenAI 인 경우
# from langchain_openai import ChatOpenAI
# llm_opanai = ChatOpenAI()

# Upstage 인 경우
from langchain_upstage import ChatUpstage
llm_upstage = ChatUpstage()

5. invoke 로 실행

llm_upstage.invoke("질문을 해봅시다...")