Building first LLM using LangChain

readme.md

• Install Python 3.11.6 from https://www.python.org/downloads/macos/. Python is installed in /Library/Frameworks/Python.framework. The default command names as python3 and pip3.
  • Python 3.12 is broken with OpenAI: https://community.openai.com/t/error-installing-openai-aiohttps-error-on-python-3-12/456052/6
• Create a new virtual environment: python3 -m venv llm
• Activate the environment: cd llm; source bin/activate
• Upgrade pip: pip install --upgrade pip
• Check the environment:

  pip list
  Package    Version
  ---------- -------
  pip        23.3.1
  setuptools 65.5.0
  

• Install OpenAI: pip install openai
• Install LangChain: pip install langchain
• Check the list of packages:

  pip list
  Package            Version
  ------------------ ---------
  aiohttp            3.8.6
  aiosignal          1.3.1
  annotated-types    0.6.0
  anyio              3.7.1
  async-timeout      4.0.3
  attrs              23.1.0
  certifi            2023.7.22
  charset-normalizer 3.3.2
  dataclasses-json   0.6.1
  frozenlist         1.4.0
  idna               3.4
  jsonpatch          1.33
  jsonpointer        2.4
  langchain          0.0.330
  langsmith          0.0.57
  marshmallow        3.20.1
  multidict          6.0.4
  mypy-extensions    1.0.0
  numpy              1.26.1
  openai             0.28.1
  packaging          23.2
  pip                23.3.1
  pydantic           2.4.2
  pydantic_core      2.10.1
  PyYAML             6.0.1
  requests           2.31.0
  setuptools         65.5.0
  sniffio            1.3.0
  SQLAlchemy         2.0.23
  tenacity           8.2.3
  tqdm               4.66.1
  typing_extensions  4.8.0
  typing-inspect     0.9.0
  urllib3            2.0.7
  yarl               1.9.2
  

• Create OpenAI key.
• Set up an environment variable for the key: export OPENAI_API_KEY="..."