The Date class

Save your copy as date.py

Notice that in this Date class there are three attributes, also known as data members:

$$ An attribute holding the month $($this is self.month$)$

$$ An attribute holding the day of the month $($this is self.day$)$

$$ An attribute holding the year $($this is self.year$)$

The Date class should have an $\_\_$init$\_\_$ method and a $\_\_$str$\_\_$ method. As we've discussed in class,

the double underscores before and after these method names indicate that these methods are special

methods that Python knows to look for. In the case of $\_\_$init$\_\_,$ this is the method that Python looks for

when making a new Date object. In the case of $\_\_$str$\_\_,$ this is the method that Python looks for when it

needs to represent the object as a string.

Q$1(25$pt$)$ : implement the $\_\_$init$\_\_($self$,$ month, day, year$)$ method and

$\_\_$str$\_\_($self$)$ method. For $\_\_$str$\_\_$ method, it should construct and return a string with the month,

day, and the year, formatted nicely to have exactly two digits places for the month, two digit places for the

day, and four for the year, e$.$g$.,$

$>>>$ d $=$ Date$(1,31,2021)$

$>>>$ str$($d$)$

$>>>01/31/2021$

Now, implement a few methods for the Date class from scratch. Be sure to add a docstring$/$method

specification to each of the methods you write!

Q$2(25$ pt$)$ : add the method isLeapYear$($self$)$ to your Date class. The method should return True if

the current object represents a Leap year, return False otherwise. Please check Wikipedia for the

definition of Leap year. E$.$g$.,$

$>>>$ d $=$ Date$(11,8,2011)$

$>>>$ d$.$isLeapYear$()$

False

$>>>$ d$2=$ Date$(3,15,2012)$

$>>>$ d$2.$isLeapYear$()$

True

Q$3(25$ pt$)$ : add the method tomorrow$($self$)$ to your Date class. This method should NOT RETURN

ANYTHING! Rather, it should change the calling object so that it represents one calendar day after the

date it originally represented. This means that self.day will definitely change. What's

more, self.month and self.year might change. You may define the list DIM $=$

$(0,31,28,31,30,31,30,31,31,30,31,30,31)$ at the very top of your python file to help you

determine how many days there are in any particular month $($self$.$month$).$

$>>>$ d $=$ Date$(12,31,2010)$

$>>>$ str$($d$)$

$12/31/2010$

$>>>$ d$.$tomorrow$()$

$>>>$ str$($d$)$

$01/01/2011$

$>>>$ d $=$ Date$(2,28,2012)$

$>>>$ d$.$tomorrow$()$

$>>>$ str$($d$)$

$02/29/2012$

$>>>$ d$.$tomorrow$()$

$>>>$ str$($d$)$

$03/01/2012$

Q$4(25$ pt$)$ : add the method isBefore$($self$,$ d$2)$to your Date class. This method should

return True if the calling object is a calendar date before the input named d$2($which will always be an

object of type Date$).$ If self and d$2$ represent the same day, this method should return False. Similarly,

if self is after d$2,$ this should return False.

$>>>$ d $=$ Date$(11,11,2011)$

$>>>$ d$2=$ Date$(1,1,2012)$

$>>>$ d$.$isBefore$($d$2)$

True

$>>>$ d$2.$isBefore$($d$)$

False

$>>>$ d$.$isBefore$($d$)$

False