infra: fix V143 host validator without pandas

Author: heathsanchez

.github/workflows/trace-ace-transcript-cache-seed.yml

@@ -83,15 +83,18 @@ jobs:
           test -f submission/submission.csv
           test -f submission/log.txt
           python - <<'PY'
-          import pandas as pd, numpy as np, json
-          fmt=pd.read_csv('data-demo/submission_format.csv')
-          out=pd.read_csv('submission/submission.csv')
-          assert list(out.columns)==['response_id','probability'], out.columns.tolist()
-          assert len(out)==len(fmt)
-          assert out.response_id.astype(str).tolist()==fmt.response_id.astype(str).tolist()
-          p=out.probability.to_numpy(float)
-          assert np.isfinite(p).all() and ((p>=0)&(p<=1)).all()
-          print(json.dumps({'rows':len(out),'p_min':float(p.min()),'p_max':float(p.max()),'p_mean':float(p.mean())},indent=2))
+          import csv, json, math
+          with open('data-demo/submission_format.csv', newline='') as f:
+              fmt=list(csv.DictReader(f))
+          with open('submission/submission.csv', newline='') as f:
+              reader=csv.DictReader(f)
+              assert reader.fieldnames==['response_id','probability'], reader.fieldnames
+              out=list(reader)
+          assert len(out)==len(fmt), (len(out),len(fmt))
+          assert [str(r['response_id']) for r in out]==[str(r['response_id']) for r in fmt]
+          p=[float(r['probability']) for r in out]
+          assert all(math.isfinite(x) and 0.0 <= x <= 1.0 for x in p)
+          print(json.dumps({'rows':len(out),'p_min':min(p),'p_max':max(p),'p_mean':sum(p)/len(p)},indent=2))
           PY
           cp submission/log.txt ../v143_official_log.txt
           cp submission/submission.csv ../v143_demo_submission.csv