Calendar.inverse¶

Calendar.inverse(starting: date = None, ending: date = None)¶

Returns a calendar with all dates between starting and ending, excluding any days in this calendar.

Parameters:

starting (datetime.date) – the starting date of the new calendar (defaults to calendar[0])
ending (datetime.date) – the ending date of the new calendar (defaults to calendar[-1])

Returns:

Inverse of this calendar

Return type:

Calendar

Example

Compute the open weekdays in 2022 from a list of holidays

>>> import datetime
>>> holidays = [
...     datetime.date(2022, 1, 17),
...     datetime.date(2022, 5, 30),
...     datetime.date(2022, 6, 4),
...     datetime.date(2022, 9, 5),
...     datetime.date(2022, 11, 11),
...     datetime.date(2022, 12, 24),
...     datetime.date(2022, 12, 26)
... ]
>>> calendar = dtwo.Calendar(holidays).inverse(
...    datetime.date(2022,1,1), datetime.date(2022, 12, 31)
... ).weekdays()