"""固定数据下的单阈值成员集合检查，不使用收益选择阈值。"""
import hashlib
import json

rows = [("AAA", 17, .12), ("BBB", 18, .12), ("CCC", 20, .12), ("DDD", 21, .12),
        ("EEE", 23, .12), ("FFF", 19, .08), ("GGG", None, .12)]
snapshot = hashlib.sha256(json.dumps(rows).encode()).hexdigest()
grid = [18, 20, 22]
members = [{symbol for symbol, pe, growth in rows if pe is not None and 0 < pe < cutoff and growth >= .10} for cutoff in grid]

def check_nested(sets):
    if any(not left <= right for left, right in zip(sets, sets[1:])):
        raise ValueError("non_monotone_membership")

check_nested(members)
stable = set.intersection(*members)
union = set.union(*members)
assert [sorted(s) for s in members] == [["AAA"], ["AAA", "BBB"], ["AAA", "BBB", "CCC", "DDD"]]
assert stable == {"AAA"} and union-stable == {"BBB", "CCC", "DDD"}
assert sum(map(len, members)) == 7 and len(union) == 4
assert hashlib.sha256(json.dumps(rows).encode()).hexdigest() == snapshot
try:
    check_nested([{ "AAA" }, { "BBB" }])
except ValueError as exc:
    assert str(exc) == "non_monotone_membership"
else:
    raise AssertionError("非单调配置必须拒绝")
print(json.dumps({"grid": grid, "members": [sorted(s) for s in members], "stable": sorted(stable),
                  "boundary": sorted(union-stable), "unique_candidates": len(union), "summed_memberships": 7}, sort_keys=True))