-ķ !'e>c s‰dZdiƒZdddddddddddddg Zd„Z d„Zdfd „ƒYZTd „Zd S( sCProvide the Date class, to represent dates in the Western calendar.sex January February March April May June July August September October November Decemberiiiics= |ddjo|ddjp|ddjSdS(s.Return 1 for leap years, 0 for non-leap years.iiidiN(syear(syear((sping.pysisleapscs,   t||djo t|ƒSdS(s;Return the number of days in a given month of a given year.iN(smdayssmonthsisleapsyear(syearsmonth((sping.pys monthdays ssDatecszdZd„Zd„Zd„Z d„Z$d„Z.d„Z9d„Z=d„ZMd „Z RS( sĪInstances of this class represent a date in the Western calendar. Dates can be converted to strings, and integers can be added to and subtracted from dates to adjust them by a given number of days.cs.|||f\|_|_|_dS(s=Construct a Date, given numbers for the year, month, and day.N(syearsmonthsdaysself(sselfsyearsmonthsday((sping.pys__init__scs$d|i|i|ifSdS(NsDate(%d, %d, %d)(sselfsyearsmonthsday(sself((sping.pys__repr__scs'd|i|i|ifSdS(s5Convert this date into a string in YYYY-MM-DD format.s%04d-%02d-%02dN(sselfsyearsmonthsday(sself((sping.pys__str__scs+ !"dt|i|i|ifSdS(s:Convert this date into a form such as 'February 26, 2003'.s %s %d, %dN(smonthssselfsmonthsdaysyear(sself((sping.pys longformat scsž$%&|it|i|iƒjoR'|idjo(t|idddƒSn*t|i|iddƒSn!,t|i|i|idƒSdS(s;Return the Date of the day immediately following this Date.i iN(sselfsdays monthdayssyearsmonthsDate(sself((sping.pysnext$s "!csµ./0|idjox1|idjo.2t|iddt|iddƒƒSn44t|i|id5t|i|idƒƒSn!7t|i|i|idƒSdS(s;Return the Date of the day immediately preceding this Date.ii N(sselfsdaysmonthsDatesyears monthdays(sself((sping.pysprev.s.!cs>9:t|i|i|if;|i|i|ifƒSdS(N(scmpsselfsyearsmonthsdaysother(sselfsother((sping.pys__cmp__9scs¬=ABt|tƒ oCtd‚nD|}Ex1E|djo F|iƒ}G|d8}q9WHx1H|djo I|iƒ}J|d7}qpWK|SdS(s»Add an integer number of days from this Date, yielding a Date. Adding a positive number will advance forward in time; adding a negative number will step backward in time.s#only integers can be added to datesiiN(s isinstancesdayssints TypeErrorsselfsresultsnextsprev(sselfsdayssresult((sping.pys__add__=s csMQR|| SdS(sŹSubtract an integer number of days from this Date, yielding a Date. Subtracting a positive number will step backward in time; subtracting a negative number will advance forward in time.N(sselfsother(sselfsother((sping.pys__sub__Ms( s__doc__s__init__s__repr__s__str__s longformatsnextsprevs__cmp__s__add__s__sub__(((sping.pysDates       cs†TXYt|ƒdjp|ddjp|ddjoZtd‚n[tt|d ƒt|dd!ƒt|dƒƒSdS( sĄConstruct a Date object from a string in YYYY-MM-DD format. The string must have exactly 10 characters, with two hyphens in the right positions, and digits in all other positions.i is-is'incorrect date format (need YYYY-MM-DD)iiN(slensstrdates ValueErrorsDatesint(sstrdate((sping.pysmakedateTs8N(s__doc__ssplitsmonthssmdayssisleaps monthdayssDatesmakedate(sDatesmakedatesmdayss monthdayssisleapsmonths((sping.pys?s 0  E