Codemod Python Packages

ast-grep-cli

⚡A CLI tool for code structural search, lint and rewriting. Written in Rust

ast-grep-py

⚡A CLI tool for code structural search, lint and rewriting. Written in Rust

bump-pydantic

Convert Pydantic from V1 to V2 ♻

mcp-migrate

Find and fix what the MCP 2026-07-28 spec revision breaks in your server. 21 rules, 19 of them with fixers, and a readiness board.

autotransform

AutoTransform is a framework for large-scale, automated code modification in a production environment.

django-codemod

A tool to automatically fix Django deprecations.

ast-grep-pyo3

⚡A CLI tool for code structural search, lint and rewriting. Written in Rust

rejox

React to React Native migration tool — turns a React web app into a working Expo app. AST codemods first, AI only for the residue, validated with tsc + Metro.

obelize

Find code that still uses a deprecated Python library (google-generativeai, PyPDF2, openai 0.x) and migrate the provably safe part to its replacement, with a reviewable report.

hammurabi

An extensible CLI tool responsible for enforcing user-defined rules

remove-print-statements

A command-line tool (and pre-commit hook) to remove print statements from your Python project.

pytest-mark-no-py3

pytest plugin and bowler codemod to help migrate tests to Python 3

surgraft

LLM tool to move functions across files with 0 token cost