mirror of
https://github.com/ets-labs/python-dependency-injector.git
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3ca6dd9af1
* Implement providers traversal in first precision * Implement traversal for all providers * Update traverse interface + add some tests * Refactor tests * Add tests for callable provider * Add configuration tests * Add Factory tests * Add FactoryAggrefate tests * Add .provides attribute to singleton providers * Add singleton provider tests * Add list and dict provider tests * Add resource tests * Add Container provider tests * Add Selector provider tests * Add ProvidedInstance provider tests * Add AttributeGetter provider tests * Add ItemGetter provider tests * Add MethodCaller provider tests * Refactor container interface * Update resource provider string representation * Add .initializer attribute to Resource provider * Add docs and examples * Remove not needed EOL in the tests * Make cosmetic refactoring * Ignore flake8 line width error in traverse example
34 lines
1.1 KiB
ReStructuredText
34 lines
1.1 KiB
ReStructuredText
Container providers traversal
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-----------------------------
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To traverse container providers use method ``.traverse()``.
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.. literalinclude:: ../../examples/containers/traverse.py
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:language: python
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:lines: 3-
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:emphasize-lines: 38
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Method ``.traverse()`` returns a generator. Traversal generator visits all container providers.
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This includes nested providers even if they are not present on the root level of the container.
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Traversal generator guarantees that each container provider will be visited only once.
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It can traverse cyclic provider graphs.
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Traversal generator does not guarantee traversal order.
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You can use ``types=[...]`` argument to filter providers. Traversal generator will only return
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providers matching specified types.
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.. code-block:: python
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:emphasize-lines: 3
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container = Container()
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for provider in container.traverse(types=[providers.Resource]):
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print(provider)
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# <dependency_injector.providers.Resource(<function init_database at 0x10bd2cb80>) at 0x10d346b40>
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# <dependency_injector.providers.Resource(<function init_cache at 0x10be373a0>) at 0x10d346bc0>
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.. disqus::
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