Alembic

Alembic is a lightweight database migration tool for Python applications that use SQLAlchemy. It allows developers to manage schema changes and version database modifications over time. Developers use Alembic to create migration scripts, run migrations incrementally, and handle complex database refactoring tasks. The tool supports various databases and provides features for automatic migration generation and offline mode for generating SQL scripts without executing them directly.

Alembic is developed by sqlalchemy and is released under the MIT license. The tool integrates with SQLAlchemy projects and offers a command-line interface for managing the migration environment. It includes capabilities for handling different database-specific scenarios, such as batch migrations for SQLite, working with branches for parallel development, and customizing how schema changes are detected and applied across different database systems.