Class CharSwapAugmenter

textattack/augmentation/recipes.py:131–155

Augments words by swapping characters out for other characters.

class CharSwapAugmenter(Augmenter):
    """Augments words by swapping characters out for other characters."""

    def __init__(self, **kwargs):
        from textattack.transformations import (
            CompositeTransformation,
            WordSwapNeighboringCharacterSwap,
            WordSwapRandomCharacterDeletion,
            WordSwapRandomCharacterInsertion,
            WordSwapRandomCharacterSubstitution,
        )

        transformation = CompositeTransformation(
            [
                # (1) Swap: Swap two adjacent letters in the word.
                WordSwapNeighboringCharacterSwap(),
                # (2) Substitution: Substitute a letter in the word with a random letter.
                WordSwapRandomCharacterSubstitution(),
                # (3) Deletion: Delete a random letter from the word.
                WordSwapRandomCharacterDeletion(),
                # (4) Insertion: Insert a random letter in the word.
                WordSwapRandomCharacterInsertion(),
            ]
        )
        super().__init__(transformation, constraints=DEFAULT_CONSTRAINTS, **kwargs)


class CheckListAugmenter(Augmenter):