Upgrading Django

For Python, and Django in particular, there isn’t a direct analog to codemods as in JavaScript. Python’s dynamic typing and highly flexible syntax make automated code transformations more challenging.

However, there are several tools that can assist with codebase-wide changes and updates in Python and Django:

2to3: This is a Python program that reads Python 2.x source code and applies a series of fixers to transform it into valid Python 3.x code.
Black: This is a code formatter for Python. While not exactly a codemod, it can apply widespread formatting changes across a codebase.
pyupgrade: This is a tool to automatically upgrade syntax for newer versions of the language. It is not Django-specific, but it can be helpful for modernizing Python syntax.
Django Upgrade: Django itself provides detailed upgrade instructions with each new release, outlining necessary changes.
Deprecation Warnings: Python (and Django) have robust mechanisms for issuing warnings about deprecated features. Running your test suite with warnings enabled (python -Wd manage.py test) can help identify code that needs to be updated.
Third-Party Compatibility Packages: When upgrading Django, some third-party packages might not immediately support the new version. There are compatibility packages like django-compat that provide backwards compatibility for older versions of Django.
Test Suite: As with Rails, a comprehensive test suite is vital during an upgrade. It can help catch regressions and verify that everything still works as expected after the upgrade.

Again, there isn’t a direct analog to codemods for Django or Python, but there are a number of tools and strategies that can help manage updates and modernization of a Django codebase.