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71 lines
2.3 KiB
Python
71 lines
2.3 KiB
Python
"""Measure text layers the way the Python pipeline measures them.
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Reads one `{"name", "text"}` JSON object per line and writes back the numbers
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each gate is decided on, so the judgement can be compared without shipping any
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book. Two of the measurements — the letter share and the Latin-1 share — are
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written inline in the Python's garbled gate rather than in a function of their
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own, so they are spelled out again here, copied line for line.
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CATENA_PARITY_PYTHONPATH=/path/to/book-pipeline/src \
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python3 oracle/pdftriage.py < cases/pdftriage/samples.ndjson
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"""
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import json
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import os
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import sys
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for path in os.environ.get("CATENA_PARITY_PYTHONPATH", "").split(os.pathsep):
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if path:
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sys.path.insert(0, path)
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from book_pipeline import convert # noqa: E402
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def letter_share(body: list[str]) -> float:
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if not body:
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return 0.0
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return sum(1 for c in body if c.isalpha()) / len(body)
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def latin1_share(body: list[str]) -> float:
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if not body:
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return 0.0
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return sum(1 for c in body if 0xA1 <= ord(c) <= 0xFF) / len(body)
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def english_share(text: str, min_words: int = 80) -> float | None:
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words = [w.strip(".,;:!?()[]\"'").lower() for w in text.split()]
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words = [w for w in words if w]
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if len(words) < min_words:
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return None
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return sum(1 for w in words if w in convert._COMMON_WORDS) / len(words)
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def main() -> int:
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out = sys.stdout
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for line in sys.stdin.buffer.read().decode("utf-8").split("\n"):
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if not line.strip():
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continue
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case = json.loads(line)
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text = case["text"]
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body = [c for c in text if not c.isspace()]
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shape = convert._word_shape(text)
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decoded = convert.undo_reflected_font(text)
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record = {
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"name": case["name"],
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"body": len(body),
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"ascii": convert._ascii_text_score(text),
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"letters": letter_share(body),
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"latin1": latin1_share(body),
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"vowelled": None if shape is None else shape[0],
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"tidy": None if shape is None else shape[1],
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"english": english_share(text),
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"decoded": decoded,
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}
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out.write(json.dumps(record, ensure_ascii=False, sort_keys=True) + "\n")
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return 0
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if __name__ == "__main__":
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raise SystemExit(main())
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