This project is deprecated as of November 2010

At Lingospot, we now use simpler ways to do the same sort of dependency inversion. The approach remains the same: pass a component's dependencies in as function parameters, rather than statically importing them.

Presentation Slides: Dependency Inversion in Python

Dependency Inversion is necessary to write testable, modular and reusable libraries.

Here are slides with more information about Dependency Inversion & Dippy.

Dippy (deprecated)

Dippy is a simple library to make Dependency Inversion easier in Python.

About Dippy

• Dippy provides similar benefits to Java Dependency Injection frameworks, while avoiding some of the complexity.
• Dippy libraries are Python functions, and library dependencies are simply passed in as normal function parameters.
• Dippy's dependency annotations make it easy to wire together components by building up environments.
• Dippy is orthogonal to Python's class & type system. This makes it easy to add to existing projects.