22 lines
739 B
Python
22 lines
739 B
Python
import re
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from typing import Dict, Optional
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class TextNormalizer:
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"""Text normalization."""
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DEFAULT_REPLACEMENTS = {
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"\\[": "$$", "\\]": "$$", "\\(": "$", "\\)": "$",
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'\u2018': "'", '\u2019': "'", '\u0060': "'",
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'\u201C': '"', '\u201D': '"',
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'\u2013': '-', '\u2014': '--', '\u2212': '-',
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'\u00A0': ' ', '\u2026': '...'
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}
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def __init__(self, custom_rules: Optional[Dict[str, str]] = None):
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self.replacements = {**self.DEFAULT_REPLACEMENTS, **(custom_rules or {})}
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self._pattern = re.compile('|'.join(re.escape(k) for k in self.replacements))
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def normalize(self, text: str) -> str:
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return self._pattern.sub(lambda m: self.replacements[m.group()], text)
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