mirror of
https://github.com/ets-labs/python-dependency-injector.git
synced 2024-11-29 04:53:59 +03:00
bf978601ba
* Refactor services mini app with single container * Make few little fixes to single container app * Update requirements.txt for single container example * Refactor multiple containers example * Add single container docs page * Create multiple containers page
140 lines
5.2 KiB
ReStructuredText
140 lines
5.2 KiB
ReStructuredText
=================================================================
|
|
Dependency Injector --- Dependency injection framework for Python
|
|
=================================================================
|
|
|
|
.. meta::
|
|
:google-site-verification: V1hlKfpgL3AARAElwFcqP4qW1Smsx5bKSRU8O86i20Y
|
|
:keywords: Python,Dependency injection,DI,Inversion of Control,IoC,
|
|
IoC Container,Factory, Singleton, Design Patterns
|
|
:description: Dependency Injector is a dependency injection framework
|
|
for Python. It helps to maintain you application structure.
|
|
It was designed to be unified, developer-friendly
|
|
tool that helps to implement dependency injection design
|
|
pattern in formal, pretty, Pythonic way. Dependency Injector
|
|
provides implementations of such popular design patterns
|
|
like IoC container, Factory and Singleton. Dependency
|
|
Injector providers are implemented as C extension types
|
|
using Cython.
|
|
|
|
.. _index:
|
|
|
|
.. image:: https://img.shields.io/pypi/v/dependency_injector.svg
|
|
:target: https://pypi.org/project/dependency-injector/
|
|
:alt: Latest Version
|
|
|
|
.. image:: https://img.shields.io/pypi/l/dependency_injector.svg
|
|
:target: https://pypi.org/project/dependency-injector/
|
|
:alt: License
|
|
|
|
.. image:: https://img.shields.io/pypi/pyversions/dependency_injector.svg
|
|
:target: https://pypi.org/project/dependency-injector/
|
|
:alt: Supported Python versions
|
|
|
|
.. image:: https://img.shields.io/pypi/implementation/dependency_injector.svg
|
|
:target: https://pypi.org/project/dependency-injector/
|
|
:alt: Supported Python implementations
|
|
|
|
.. image:: https://pepy.tech/badge/dependency-injector
|
|
:target: https://pepy.tech/project/dependency-injector
|
|
:alt: Downloads
|
|
|
|
.. image:: https://pepy.tech/badge/dependency-injector/month
|
|
:target: https://pepy.tech/project/dependency-injector
|
|
:alt: Downloads
|
|
|
|
.. image:: https://pepy.tech/badge/dependency-injector/week
|
|
:target: https://pepy.tech/project/dependency-injector
|
|
:alt: Downloads
|
|
|
|
.. image:: https://img.shields.io/pypi/wheel/dependency-injector.svg
|
|
:target: https://pypi.org/project/dependency-injector/
|
|
:alt: Wheel
|
|
|
|
.. image:: https://travis-ci.org/ets-labs/python-dependency-injector.svg?branch=master
|
|
:target: https://travis-ci.org/ets-labs/python-dependency-injector
|
|
:alt: Build Status
|
|
|
|
.. image:: http://readthedocs.org/projects/python-dependency-injector/badge/?version=latest
|
|
:target: http://python-dependency-injector.ets-labs.org/
|
|
:alt: Docs Status
|
|
|
|
.. image:: https://coveralls.io/repos/github/ets-labs/python-dependency-injector/badge.svg?branch=master
|
|
:target: https://coveralls.io/github/ets-labs/python-dependency-injector?branch=master
|
|
:alt: Coverage Status
|
|
|
|
``Dependency Injector`` is a dependency injection framework for Python.
|
|
|
|
It helps implementing the dependency injection principle.
|
|
|
|
Key features of the ``Dependency Injector``:
|
|
|
|
- **Providers**. Provides ``Factory``, ``Singleton``, ``Callable``, ``Coroutine``, ``Object``,
|
|
``List``, ``Configuration``, ``Dependency`` and ``Selector`` providers that help assembling your
|
|
objects. See :ref:`providers`.
|
|
- **Overriding**. Can override any provider by another provider on the fly. This helps in testing
|
|
and configuring dev / stage environment to replace API clients with stubs etc. See
|
|
:ref:`provider-overriding`.
|
|
- **Configuration**. Read configuration from ``yaml`` & ``ini`` files, environment variables
|
|
and dictionaries. See :ref:`configuration-provider`.
|
|
- **Containers**. Provides declarative and dynamic containers. See :ref:`containers`.
|
|
- **Performance**. Fast. Written in ``Cython``.
|
|
- **Maturity**. Mature and production-ready. Well-tested, documented and supported.
|
|
|
|
.. code-block:: python
|
|
|
|
from dependency_injector import containers, providers
|
|
|
|
|
|
class Container(containers.DeclarativeContainer):
|
|
|
|
config = providers.Configuration()
|
|
|
|
api_client = providers.Singleton(
|
|
ApiClient,
|
|
api_key=config.api_key,
|
|
timeout=config.timeout.as_int(),
|
|
)
|
|
|
|
service = providers.Factory(
|
|
Service,
|
|
api_client=api_client,
|
|
)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
container = Container()
|
|
container.config.api_key.from_env('API_KEY')
|
|
container.config.timeout.from_env('TIMEOUT')
|
|
|
|
service = container.service()
|
|
|
|
With the ``Dependency Injector`` you keep **application structure in one place**.
|
|
This place is called **the container**. You use the container to manage all the components of the
|
|
application. All the component dependencies are defined explicitly. This provides the control on
|
|
the application structure. It is **easy to understand and change** it.
|
|
|
|
.. figure:: https://raw.githubusercontent.com/wiki/ets-labs/python-dependency-injector/img/di-map.svg
|
|
:target: https://github.com/ets-labs/python-dependency-injector
|
|
|
|
*The container is like a map of your application. You always know what depends on what.*
|
|
|
|
Explore the documentation to know more about the ``Dependency Injector``.
|
|
|
|
.. _contents:
|
|
|
|
Contents
|
|
--------
|
|
|
|
.. toctree::
|
|
:maxdepth: 2
|
|
|
|
introduction/index
|
|
examples/index
|
|
tutorials/index
|
|
providers/index
|
|
containers/index
|
|
examples-other/index
|
|
api/index
|
|
main/feedback
|
|
main/changelog
|