index.rst

Tutorial

Let's write a wired application using inversion of control (IoC).

Note

This tutorial uses dataclasses. Why? Why not? [wink] There's nothing in the core of wired that requires type hints, dataclasses, etc., although wired does ship with a dependency injection system based on dataclasses.

Our application will be a Greeter. Someone walks in a store, they get greeted. We'd like IoC to help us make this into a decoupled, extensible, configurable, pluggable application.

• We might want to change the Greeter
• The Greeter's greeting has punctuation...maybe that is in a config file
• We might want a Customer who receives the greeting
• We might want a FrenchGreeter for a FrenchCustomer
• Each Customer comes from a "datastore"..let's make that transparent and pluggable
• Some people might not like our decisions...let's show how to replace built-in stuff, in certain (unlike other Python plugin systems which focus on adding stuff)
• Finally, let's make it look like the patterns we see in web frameworks

Tutorial Steps

simple/index factory/index settings/index context/index decoupled/index datastore/index overrides/index requests_views/index