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30 lines
1.3 KiB
ReStructuredText
30 lines
1.3 KiB
ReStructuredText
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Operating with catalogs
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-----------------------
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``di.AbstractCatalog`` has several features that could be useful for some kind
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of operations on catalog's providers:
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- ``di.AbstractCatalog.providers`` is read-only attribute that contains
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``dict`` of all catalog providers, including providers that are inherited
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from parent catalogs, where key is the name of provider and value is
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provider itself.
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- ``di.AbstractCatalog.cls_providers`` is read-only attribute contains ``dict``
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of current catalog providers, where key is the name of provider and value is
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provider itself.
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- ``di.AbstractCatalog.inherited_providers`` is read-only attribute contains
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``dict`` of all providers that are inherited from parent catalogs, where key
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is the name of provider and value is provider itself.
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- ``di.AbstractCatalog.filter(provider_type=di.Provider)`` is a class method
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that could be used for filtering catalog providers by provider types
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(for example, for getting all ``di.Factory`` providers).
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``di.AbstractCatalog.filter()`` method use ``di.AbstractCatalog.providers``.
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Example:
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.. image:: /images/catalogs/operating_with_providers.png
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:width: 100%
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:align: center
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.. literalinclude:: ../../examples/catalogs/operating_with_providers.py
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:language: python
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