sundeep-news-scan/scratch_py/_regress_grow.py

174 lines
6.6 KiB
Python

"""Regression harness for _grow_article_downward.
Runs the grow function over the saved fixtures of EVERY cached run, with IDENTICAL
auxiliary inputs (claimed = union of OTHER articles' members on the page,
dateline_starts = None). Because old and new code receive the same inputs, a diff
of the two output snapshots isolates exactly what the code change does.
Records per article: the grown member-id set and its union bbox, tagged with the
source newspaper (from meta.json) so results can be broken down per paper.
Usage:
python3 _regress_grow.py snapshot.json # snapshot current code
python3 _regress_grow.py --diff a.json b.json # compare two snapshots
"""
import json
import re
import sys
from collections import Counter
from pathlib import Path
OUT = Path("output")
def union_bbox(member_ids, region_map):
bs = [region_map[r]["bbox"] for r in member_ids if r in region_map]
if not bs:
return None
return [min(b[0] for b in bs), min(b[1] for b in bs),
max(b[2] for b in bs), max(b[3] for b in bs)]
def paper_of(run_dir):
meta = run_dir / "meta.json"
if meta.exists():
try:
fn = json.loads(meta.read_text()).get("filename", "")
name = re.split(r"[_0-9]", fn)[0].strip()
if name:
return name
except Exception:
pass
# Cached fixtures carry no meta.json; identify the paper by page-1 image height,
# which is distinct per edition (verified against the printed masthead nameplate).
png = run_dir / "pages" / "page_001.png"
if png.exists():
try:
from PIL import Image
h = Image.open(png).height
if 7040 <= h <= 7060:
return "Sakshi"
if h in (6833, 6549):
return "Andhra Jyothi"
if h == 6422:
return "Namaste Telangana"
except Exception:
pass
return "unknown"
def run():
from smart_extractor import _grow_article_downward
runs = sorted([d for d in OUT.iterdir() if d.is_dir()],
key=lambda d: d.stat().st_mtime, reverse=True)
snapshot = {}
papers = Counter()
for run_dir in runs:
pages_dir = run_dir / "pages"
if not pages_dir.exists():
continue
paper = paper_of(run_dir)
for reg_path in sorted(pages_dir.glob("page_*.regions.json")):
pol_path = reg_path.with_name(reg_path.name.replace(".regions.json",
".political_result.json"))
if not pol_path.exists():
continue
regions = json.loads(reg_path.read_text())["regions"]
region_map = {r["id"]: r for r in regions}
political = json.loads(pol_path.read_text()).get("political_articles", [])
# claimed = every member of every article (mirrors the real caller's
# global claimed set built before growth).
all_members = set()
for a in political:
all_members.update(a.get("member_region_ids", []))
for i, art in enumerate(political):
members = art.get("member_region_ids", []) or []
if not members:
continue
# claimed for THIS article = everything claimed by OTHER articles.
claimed = set(all_members) - set(members)
grown, added = _grow_article_downward(
members, region_map, regions, claimed, dateline_starts=None
)
key = f"{run_dir.name}/{reg_path.stem}/art{i}"
snapshot[key] = {
"paper": paper,
"headline": art.get("headline_english", "")[:50],
"in_members": sorted(members),
"grown_members": sorted(grown),
"added": sorted(added),
"in_bbox": union_bbox(members, region_map),
"grown_bbox": union_bbox(grown, region_map),
}
papers[paper] += 1
print(f" papers: {dict(papers)}")
return snapshot
def diff(path_a, path_b):
"""Compare snapshot A (baseline/OLD) against B (NEW). Reports per-paper how many
articles changed their grown member set, plus a sample of the changes."""
a = json.loads(Path(path_a).read_text())
b = json.loads(Path(path_b).read_text())
keys = sorted(set(a) | set(b))
per_paper_total = Counter()
per_paper_changed = Counter()
grew = Counter() # NEW added regions OLD didn't
shrank = Counter() # NEW dropped regions OLD had
samples = []
for k in keys:
ra, rb = a.get(k), b.get(k)
paper = (rb or ra).get("paper", "unknown")
per_paper_total[paper] += 1
if ra is None or rb is None:
per_paper_changed[paper] += 1
samples.append((k, paper, "ONLY IN ONE SNAPSHOT", None, None))
continue
sa, sb = set(ra["grown_members"]), set(rb["grown_members"])
if sa != sb:
per_paper_changed[paper] += 1
added = sorted(sb - sa)
removed = sorted(sa - sb)
if added:
grew[paper] += 1
if removed:
shrank[paper] += 1
samples.append((k, paper, rb["headline"], added, removed))
print("\n=== REGRESSION DIFF (A=baseline/OLD → B=new) ===")
print(f"{'paper':<18}{'articles':>10}{'changed':>9}{'grew':>7}{'shrank':>8}")
for paper in sorted(per_paper_total):
print(f"{paper:<18}{per_paper_total[paper]:>10}{per_paper_changed[paper]:>9}"
f"{grew[paper]:>7}{shrank[paper]:>8}")
tot = sum(per_paper_total.values())
chg = sum(per_paper_changed.values())
print(f"{'TOTAL':<18}{tot:>10}{chg:>9}{sum(grew.values()):>7}{sum(shrank.values()):>8}")
if samples:
print(f"\n--- {len(samples)} changed article(s) (showing up to 40) ---")
for k, paper, hl, added, removed in samples[:40]:
print(f"\n[{paper}] {k}")
print(f" headline: {hl}")
if added:
print(f" + added : {added}")
if removed:
print(f" - removed: {removed}")
else:
print("\nNo differences — grown member sets are identical across all fixtures.")
return chg
if __name__ == "__main__":
if len(sys.argv) >= 4 and sys.argv[1] == "--diff":
diff(sys.argv[2], sys.argv[3])
else:
out_path = sys.argv[1] if len(sys.argv) > 1 else "/tmp/grow_snapshot.json"
snap = run()
Path(out_path).write_text(json.dumps(snap, indent=2, ensure_ascii=False))
print(f"wrote {len(snap)} article snapshots to {out_path}")