You have two date ranges (a and b) and you want to subtract b from a:
a: <---------->
b: <---------->
a - b: <--->
In code:
>>> from datetime import datetime
>>> from arithmetical_date_range import ArithmeticalDateRange
>>> a = ArithmeticalDateRange(start=datetime(2021, 1, 1), end=datetime(2021, 1, 3))
>>> b = ArithmeticalDateRange(start=datetime(2021, 1, 2), end=datetime(2021, 1, 4))
>>> a - b
ArithmeticalDateRange(2021-01-01 00:00:00, 2021-01-02 00:00:00)Or you want to add b to a:
a: <---------->
b: <---------->
a b: <--------------->
In code:
>>> from datetime import datetime
>>> from arithmetical_date_range import ArithmeticalDateRange
>>> a = ArithmeticalDateRange(start=datetime(2021, 1, 1), end=datetime(2021, 1, 3))
>>> b = ArithmeticalDateRange(start=datetime(2021, 1, 2), end=datetime(2021, 1, 4))
>>> a b
ArithmeticalDateRange(2021-01-01 00:00:00, 2021-01-04 00:00:00)Or you want to cut a part out of a using b:
a: <---------------------------->
b: <--------------->
a - b: <----> <----->
In code:
>>> from datetime import datetime
>>> from arithmetical_date_range import ArithmeticalDateRange
>>> a = ArithmeticalDateRange(start=datetime(2021, 1, 1), end=datetime(2021, 1, 4))
>>> b = ArithmeticalDateRange(start=datetime(2021, 1, 2), end=datetime(2021, 1, 3))
>>> a - b
[ArithmeticalDateRange(2021-01-01 00:00:00, 2021-01-02 00:00:00), ArithmeticalDateRange(2021-01-03 00:00:00, 2021-01-04 00:00:00)]