extract.items_transform

ItemTransform Objects

class ItemTransform(ABC, Generic[TAny])

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placement_affinity

Tell how strongly an item sticks to start (-1) or end (+1) of pipe.

__call__

@abstractmethod
def __call__(item: TDataItems, meta: Any = None) -> Optional[TDataItems]

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Transforms item (a list of TDataItem or a single TDataItem) and returns or yields TDataItems. Returns None to consume item (filter out)

ValidateItem Objects

class ValidateItem(ItemTransform[TDataItem])

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Base class for validators of data items.

Subclass should implement the __call__ method to either return the data item(s) or raise extract.exceptions.ValidationError. See PydanticValidator for possible implementation.

placement_affinity

stick to end but less than incremental

LimitItem Objects

class LimitItem(ItemTransform[TDataItem])

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placement_affinity

stick to end right behind incremental