Menyediakan LangChain (Persekitaran dan Pemasangan)

# Create virtual environment
python -m venv langchain_env

# Activate (Windows)
langchain_env\Scripts\activate

# Activate (Mac/Linux)
source langchain_env/bin/activate

# Install LangChain (latest version)
pip install langchain

# Install community integrations
pip install langchain-community

# Install OpenAI support
pip install langchain-openai

# Other useful packages
pip install python-dotenv
pip install faiss-cpu
pip install chromadb
pip install tiktoken
pip install pypdf

OPENAI_API_KEY=your_api_key_here
LANGCHAIN_TRACING_V2=true
LANGCHAIN_API_KEY=your_langchain_key

from dotenv import load_dotenv
import os

load_dotenv()
api_key = os.getenv("OPENAI_API_KEY")
print(api_key)

from langchain_openai import ChatOpenAI

llm = ChatOpenAI(model="gpt-3.5-turbo")
response = llm.invoke("Hello! LangChain is working.")
print(response.content)

langchain-project/
|-- .env
|-- app.py
|-- requirements.txt
|-- data/
|   `-- sample.pdf
|-- notebooks/
`-- README.md