textflint.generation_layer.transformation.DP.delete_sub_tree

Remove a subtree in the sentence

class textflint.generation_layer.transformation.DP.delete_sub_tree.DeleteSubTree(**kwargs)

Bases: textflint.generation_layer.transformation.transformation.Transformation

Transforms the input sentence by removing a subordinate clause.

Example:

original: "The bill intends to restrict the RTC to
    Treasury borrowings only, unless the agency receives
    specific congressional authorization."
transformed: "The bill intends to restrict the RTC to
    Treasury borrowings only."

find_subtree(sample)

Find all the subtrees that can be removed.

Parameters

sample (~DPSample) –

Returns

A list of the subtrees, long to short.

class textflint.generation_layer.transformation.DP.delete_sub_tree.Transformation(**kwargs)

Bases: abc.ABC

An abstract class for transforming a sequence of text to produce a list of potential adversarial example.

processor = <textflint.common.preprocess.en_processor.EnProcessor object>

transform(sample, n=1, field='x', **kwargs)

Transform data sample to a list of Sample.

Parameters

• sample (Sample) – Data sample for augmentation.

• n (int) – Max number of unique augmented output, default is 5.

• field (str|list) – Indicate which fields to apply transformations.

• **kwargs (dict) –

  other auxiliary params.

Returns

list of Sample

classmethod sample_num(x, num)

Get ‘num’ samples from x.

Parameters

• x (list) – list to sample

• num (int) – sample number

Returns

max ‘num’ unique samples.