Zakaria
68 lines
2.0 KiB
Python
68 lines
2.0 KiB
Python
"""Shared entity-name normalization helpers (stdlib-only).
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Used by entity_resolution.py and timing_analysis.py.
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"""
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from __future__ import annotations
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import re
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# Legal suffixes / corporate boilerplate to strip during normalization.
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_SUFFIX_TOKENS = {
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"INC", "INCORPORATED", "LLC", "LLP", "LP", "LTD", "LIMITED",
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"CORP", "CORPORATION", "CO", "COMPANY",
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"GROUP", "GRP", "HOLDINGS", "HOLDING",
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"PARTNERS", "ASSOCIATES",
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"INTERNATIONAL", "INTL",
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"ENTERPRISES", "ENTERPRISE",
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"SERVICES", "SERVICE", "SVCS",
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"SOLUTIONS", "MANAGEMENT", "MGMT", "CONSULTING",
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"TECHNOLOGY", "TECHNOLOGIES", "TECH",
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"INDUSTRIES", "INDUSTRY",
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"AMERICA", "AMERICAN",
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"USA", "US",
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"PLLC", "PC",
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"TRUST", "FOUNDATION",
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}
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_PUNCT_RE = re.compile(r"[^\w\s]")
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_WS_RE = re.compile(r"\s+")
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def normalize_name(name: str | None) -> str:
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"""Standard normalization: uppercase, strip suffixes, drop punctuation."""
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if not name:
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return ""
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s = _PUNCT_RE.sub(" ", name.upper())
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s = _WS_RE.sub(" ", s).strip()
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tokens = [t for t in s.split() if t and t not in _SUFFIX_TOKENS]
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return " ".join(tokens)
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def normalize_aggressive(name: str | None) -> str:
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"""Aggressive normalization: sorted unique tokens (word-bag)."""
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base = normalize_name(name)
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if not base:
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return ""
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return " ".join(sorted(set(base.split())))
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def name_tokens(name: str | None, min_len: int = 4) -> set[str]:
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"""Token set used for overlap matching."""
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base = normalize_name(name)
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if not base:
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return set()
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return {t for t in base.split() if len(t) >= min_len}
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def token_overlap_ratio(left: str | None, right: str | None) -> tuple[float, int]:
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"""Return (jaccard-like ratio, shared token count) over min-len tokens."""
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a = name_tokens(left)
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b = name_tokens(right)
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if not a or not b:
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return 0.0, 0
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shared = a & b
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if not shared:
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return 0.0, 0
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union = a | b
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return len(shared) / len(union), len(shared)
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