timelines Timespan and scheduling helpers for Python
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scheduling Python library Python

timelines Description

timelines is a module that provides timespan and scheduling helpers for Python.>>> import datetime>>> from timelines import timespan, timelayerA timespan object has a start time and an end time. It can be created either by specifying a start time and an elapsed time, or by specifying both start and end times:>>> span1 = timespan(datetime.datetime(1984, 11, 26), datetime.timedelta(1))>>> span2 = timespan(datetime.datetime(1984, 11, 26) + datetime.timedelta(2), datetime.datetime(1984, 11, 26) + datetime.timedelta(2, 50))>>> span1.startdatetime.datetime(1984, 11, 26, 0, 0)>>> span1.elapseddatetime.timedelta(1)The elapsed time of a timespan is the timedelta between its start and end times:>>> span1.elapsed == span1.end - span1.startTrueA timelayer object is a sorted bag of non-overlapping timespans which know the order in which they occur:>>> layer = timelayer(span2, span1)>>> list(layer) == TrueJust like a timespan, a timelayer knows its own start and end times:>>> layer.start == span1.startTrue>>> layer.end == span2.endTrueThe elapsed duration of a timelayer is the sum of the elapsed durations of the timespans it contains, NOT the delta between its start and end times:>>> layer.elapsed == span1.elapsed + span2.elapsedTrue>>> layer.elapsed == layer.end - layer.startFalseYou can add new timespans to a timelayer:>>> layer.add(timespan(datetime.datetime(1984, 11, 26) - datetime.timedelta(1), datetime.timedelta(0, 600)))However, you cannot add new timespans which overlap any existing timespans:>>> layer.add(timespan(datetime.datetime(1984, 11, 26) - datetime.timedelta(1), datetime.timedelta(2)))Traceback (most recent call last):...RuntimeErrorYou can also add constraints to a timelayer. Constraints allow you to freeze the start time and/or end time of a timelayer. New timespans cannot be added to a layer if they fail its constraints:>>> layer.freeze_start()>>> layer.add(timespan(datetime.datetime(1984, 11, 26) - datetime.timedelta(3), datetime.timedelta(2)))Traceback (most recent call last):...RuntimeErrorProduct's homepage

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