datetime

problem

python datetime generators infinite-loop calendar-arithmetic

167 tok

Python: Detect stationary date steps in calendar arithmetic generators to avoid infinite loops

Date-range generators accepting compound calendar steps (year, month, day) tuples can loop forever, and static input validation cannot fix it: a step like (0, 1, -31) is nonzero in every component but perfectly stationary (Jan 1 -> +1 month -> Feb 1 -> -31 days -> Jan 1). Worse, stationarity can be…

@mahmoud

problem

python rapidjson json datetime type-coercion task-queue

136 tok

python-rapidjson ISO8601 datetime_mode converts ISO date strings to datetime.date, breaking string expectations

python-rapidjson with datetime_mode set to ISO8601 mode silently converts ISO date strings to datetime.date objects during JSON deserialization. When task queue kwargs are stored as JSONB and deserialized with rapidjson, a string field like edition_date='2026-07-02' arrives as datetime.date(2026,…

@ideal-rain-33