jspace-unlearning / src /concepts.py
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"""Concept token sets C_t for TOFU forget10 authors (proposal §1.2).
For each author: tokenization variants of name parts (leading-space /
no-space, first subword token of each). Prompt partition: name_absent
questions (author name not in question text) are the H1 primary signal;
name_present questions are reported separately (copy confound).
"""
import json
import re
FORGET10_AUTHORS = [
"Hsiao Yun-Hwa", "Carmen Montenegro", "Elvin Mammadov", "Rajeev Majumdar",
"Jad Ambrose Al-Shamary", "Adib Jarrah", "Ji-Yeon Park", "Behrouz Rohani",
"Wei-Jun Chen", "Tae-ho Park", "Hina Ameen", "Xin Lee Williams",
"Moshe Ben-David", "Kalkidan Abera", "Takashi Nakamura", "Raven Marais",
"Aysha Al-Hashim", "Edward Patrick Sullivan", "Basil Mahfouz Al-Kuwaiti",
"Nikolai Abilov",
]
def name_parts(full_name: str) -> list[str]:
"""'Hsiao Yun-Hwa' -> ['Hsiao', 'Yun-Hwa', 'Yun', 'Hwa'] (space and hyphen splits)."""
parts = full_name.split()
for p in list(parts):
if "-" in p:
parts.extend(seg for seg in p.split("-") if len(seg) > 2)
return parts
def concept_token_ids(tokenizer, full_name: str) -> list[int]:
"""First subword token of each name variant, leading-space and bare."""
ids = []
variants = [full_name] + name_parts(full_name)
for v in variants:
for s in (f" {v}", v):
t = tokenizer(s, add_special_tokens=False).input_ids
if t:
ids.append(t[0])
return sorted(set(ids))
def author_in_text(full_name: str, text: str) -> bool:
"""Any name part (len>2) appears in text (case-insensitive, word-ish match)."""
low = text.lower()
for p in name_parts(full_name):
if len(p) > 2 and re.search(re.escape(p.lower()), low):
return True
return False
def load_forget10_rows():
"""Rows of forget10 with author index/name and name_present flag."""
from datasets import load_dataset
ds = load_dataset("locuslab/TOFU", "forget10")["train"]
rows = []
for i in range(len(ds)):
author = FORGET10_AUTHORS[i // 20]
rows.append(
{
"idx": i,
"author_idx": i // 20,
"author": author,
"question": ds[i]["question"],
"answer": ds[i]["answer"],
"name_present": author_in_text(author, ds[i]["question"]),
}
)
return rows
if __name__ == "__main__":
import transformers
tok = transformers.AutoTokenizer.from_pretrained("/workspace/models/tofu_1b_full")
rows = load_forget10_rows()
n_absent = sum(not r["name_present"] for r in rows)
print(f"forget10: {len(rows)} rows, {n_absent} name-absent")
from collections import Counter
per_author = Counter(r["author"] for r in rows if not r["name_present"])
for a in FORGET10_AUTHORS:
ids = concept_token_ids(tok, a)
toks = [tok.decode([t]) for t in ids]
print(f"{a:26s} absent={per_author.get(a, 0):2d} C_t={toks}")
json.dump(rows, open("/workspace/jspace-unlearning/results/forget10_rows.json", "w"), indent=1)