مخططات البيانات وبوابات الجودة

from math import isfinite
rows = [{"id":"a", "minutes":3.0}, {"id":"b", "minutes":float("nan")},
        {"id":"c", "minutes":-1.0}]
accepted, rejected = [], []
for row in rows:
    value = row["minutes"]
    reasons = []
    if not isfinite(value): reasons.append("nonfinite")
    elif value < 0: reasons.append("negative")
    (rejected if reasons else accepted).append((row["id"], reasons))
print("accepted", [key for key,_ in accepted])
print("rejected", rejected)

accepted ['a']
rejected [('b', ['nonfinite']), ('c', ['negative'])]

تنتج قاعدة المدة المنتهية غير السالبة المعلنة هويات صفوف وأسباباً صريحة؛ ولا تستبدل القياسات المرفوضة بصمت.

schema = {"features":["booked_seats", "days_remaining"],
          "units":["count", "days"], "version":1}
request = {"features":["days_remaining", "booked_seats"],
           "units":["days", "count"], "version":1}
print("same version", request["version"] == schema["version"])
print("same ordered contract", request == schema)
print("same feature set", set(request["features"]) == set(schema["features"]))

same version True
same ordered contract False
same feature set True

لا يثبت تطابق الإصدار ومجموعة السمات توافق ترتيبها؛ فالأسماء والمواضع والوحدات والتفسير أجزاء مترابطة من العقد.