Injecting provided object attributes, items, or call its methods

.. meta:: :keywords: Python,DI,Dependency injection,IoC,Inversion of Control,Attribute,Method,Call :description: This page demonstrates how to inject attributes, items or call method of the provided instance.

.. currentmodule:: dependency_injector.providers

You can inject provided object attribute, item or result of its method call.

.. literalinclude:: ../../examples/providers/provided_instance.py :language: python :emphasize-lines: 28-34 :lines: 3-

To use the feature you should use the .provided attribute of the injected provider. This attribute helps to specify what happens with the provided instance before the injection. You can use any combination of the following:

an attribute of the provided object
an item of the provided object
a call of the provided object method

When you use a call of the provided instance method you can specify the injections for this method like you do with any other provider.

You can do nested constructions:

.. literalinclude:: ../../examples/providers/provided_instance_complex.py :language: python :emphasize-lines: 26-32 :lines: 3-

.. disqus::