🕵️ pydependance 🐍

Python local package dependency discovery and resolution

Contributions are welcome!

Table Of Contents

• Overview
  • Why
  • How This Works
• Install
• Usage

Overview

If multiple dependencies are listed in a project, only some of them may actually be required! This project finds those dependencies!

Why

This project was created for multiple reasons

• Find missing dependencies
• Generate optional dependencies lists, eg. for pyproject.toml
• Create minimal dockerfiles with only the dependencies that are needed for a specific entrypoint

How This Works

1. Specify root python packages to search through (we call this the namespace)
   • This can either be modules under a folder, similar to PYTHONPATH
   • Or actual paths to modules
2. The AST of each python file is parsed, and import statements are found
3. Finally, dependencies are resolved using breadth-first-search and flattened.
   • imports that redirect to modules within the current namespace are flattened and replaced with imports not in the namespace.

Install

pydependance currently requires python==3.10, however, it can still be run in a virtual environment over legacy python code

pip install pydependance

Usage

python -m pydependance --help