44 lines
2.0 KiB
ReStructuredText
44 lines
2.0 KiB
ReStructuredText
.. _key-features:
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Key features
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------------
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.. meta::
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:keywords: Python,DI,Dependency injection,IoC,Inversion of Control
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:description: This article describes key features of the Dependency Injector
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framework.
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Key features of the ``Dependency Injector``:
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- **Providers**. Provides ``Factory``, ``Singleton``, ``Callable``, ``Coroutine``, ``Object``,
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``List``, ``Dict``, ``Configuration``, ``Resource``, ``Dependency``, and ``Selector`` providers
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that help assemble your objects. See :ref:`providers`.
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- **Overriding**. Can override any provider by another provider on the fly. This helps in testing
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and configuring dev/stage environment to replace API clients with stubs etc. See
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:ref:`provider-overriding`.
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- **Configuration**. Reads configuration from ``yaml``, ``ini``, and ``json`` files, ``pydantic`` settings,
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environment variables, and dictionaries. See :ref:`configuration-provider`.
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- **Resources**. Helps with initialization and configuring of logging, event loop, thread
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or process pool, etc. Can be used for per-function execution scope in tandem with wiring.
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See :ref:`resource-provider`.
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- **Containers**. Provides declarative and dynamic containers. See :ref:`containers`.
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- **Wiring**. Injects dependencies into functions and methods. Helps integrate with
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other frameworks: Django, Flask, Aiohttp, Sanic, FastAPI, etc. See :ref:`wiring`.
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- **Asynchronous**. Supports asynchronous injections. See :ref:`async-injections`.
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- **Typing**. Provides typing stubs, ``mypy``-friendly. See :ref:`provider-typing`.
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- **Performance**. Fast. Written in ``Cython``.
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- **Maturity**. Mature and production-ready. Well-tested, documented, and supported.
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The framework stands on the `PEP20 (The Zen of Python) <https://www.python.org/dev/peps/pep-0020/>`_ principle:
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.. code-block:: plain
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Explicit is better than implicit
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You need to specify how to assemble and where to inject the dependencies explicitly.
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The power of the framework is in its simplicity.
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``Dependency Injector`` is a simple tool for the powerful concept.
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.. disqus::
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