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IMPORTANT: When registering extension filters, please list each filter as its own entry point. The current functionality (loading entire modules) is deprecated and will be removed in v1.4.
See http://filters.readthedocs.io/en/latest/extensions.html#legacy-extensions-loader for more information.
FilterExtensionRegistry
is now a subclass ofclass_registry.EntryPointClassRegistry
.filters.macros.FilterMacroType
, which acts as a base type for all functions decorated with@filter_macro
.FilterMacroType
doesn't do anything on its own, but it is useful for identifying a filter macro when paired with anissubclass
check (important: useissubclass
, notisinstance
!).