How to get the last day of the month?

Question

Is there a way using Python\'s standard library to easily determine (i.e. one function call) the last day of a given month?

If the standard library doesn\'t support

Answer 1

In Python 3.7 there is the undocumented calendar.monthlen(year, month) function:

>>> calendar.monthlen(2002, 1)
31
>>> calendar.monthlen(2008, 2)
29
>>> calendar.monthlen(2100, 2)
28

It is equivalent to the documented calendar.monthrange(year, month)[1] call.