quantlab.utils.watermark.resume_from

quantlab.utils.watermark.resume_from(through, start, overlap_days=0)

Return the first day a pull asks for: the day after the watermark, less an overlap.

Never before start (the first day the pull would ask for without a watermark).

Parameters:

throughdate or None

The watermark’s day, or None without one.

startdate

The first day to ask for without a watermark.

overlap_daysint, default 0

Days before the day after the watermark asked for again.

Examples

>>> resume_from(date(2024, 3, 14), date(2024, 1, 2))
datetime.date(2024, 3, 15)
>>> resume_from(date(2024, 3, 14), date(2024, 1, 2), overlap_days=3)
datetime.date(2024, 3, 12)
>>> resume_from(None, date(2024, 1, 2))
datetime.date(2024, 1, 2)