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https://github.com/explosion/spaCy.git
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1c4df8fd09
* Replace pytokenizations with internal alignment Replace pytokenizations with internal alignment algorithm that is restricted to only allow differences in whitespace and capitalization. * Rename `spacy.training.align` to `spacy.training.alignment` to contain the `Alignment` dataclass * Implement `get_alignments` in `spacy.training.align` * Refactor trailing whitespace handling * Remove unnecessary exception for empty docs Allow a non-empty whitespace-only doc to be aligned with an empty doc * Remove empty docs exceptions completely
32 lines
803 B
Python
32 lines
803 B
Python
from typing import List
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import numpy
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from thinc.types import Ragged
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from dataclasses import dataclass
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from .align import get_alignments
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@dataclass
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class Alignment:
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x2y: Ragged
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y2x: Ragged
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@classmethod
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def from_indices(cls, x2y: List[List[int]], y2x: List[List[int]]) -> "Alignment":
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x2y = _make_ragged(x2y)
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y2x = _make_ragged(y2x)
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return Alignment(x2y=x2y, y2x=y2x)
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@classmethod
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def from_strings(cls, A: List[str], B: List[str]) -> "Alignment":
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x2y, y2x = get_alignments(A, B)
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return Alignment.from_indices(x2y=x2y, y2x=y2x)
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def _make_ragged(indices):
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lengths = numpy.array([len(x) for x in indices], dtype="i")
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flat = []
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for x in indices:
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flat.extend(x)
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return Ragged(numpy.array(flat, dtype="i"), lengths)
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