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Setting up a Development Environment

This document details how to set up a local development environment that will allow you to contribute changes to the project.

Acquire sources and create virtualenv.

git clone https://github.com/langchain-ai/langchain-postgres
cd langchain-postgres
uv venv --python=3.13
source .venv/bin/activate

Install package in editable mode.

uv sync --group test

Start PostgreSQL/PGVector.

docker run --rm -it --name pgvector-container \
  -e POSTGRES_USER=langchain \
  -e POSTGRES_PASSWORD=langchain \
  -e POSTGRES_DB=langchain_test \
  -p 6024:5432 pgvector/pgvector:pg16 \
  postgres -c log_statement=all

Invoke test cases.

export POSTGRES_PORT=6024
pytest -vvv