generators

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