"""Manage (year, month) dates."""

def restore(args):
	year = int(args[0])
	month = int(args[1])
	return Date(year, month)

class Date:

	def __init__(self, year, month):
		"create a date from year and month."
		self._year = year
		self._month = month

	def save(self, f):
		print >> f, "/".join(["Date", str(self._year),
					str(self._month)])

	def year(self):
		"return year portion of date."
		return self._year

	def month(self):
		"return month portion of date."
		return self._month

	def __cmp__(self, other):
		"return -1, 0 or 1 if date1 is before, same or after date2."
		if self.year() < other.year():
			return -1
		if self.year() > other.year():
			return 1
		if self.month() < other.month():
			return -1
		if self.month() > other.month():
			return 1
		return 0

	def __str__(self):
		return '%s/%s' % (self.month(), self.year())

if __name__ == '__main__':
	def test(d1, d2):
		if d1 < d2:
			print d1, 'is before', d2
		elif d1 > d2:
			print d1, 'is after', d2
		else:
			print d1, 'is the same as', d2
	test(Date(2000, 1), Date(1999, 8))
	test(Date(2000, 1), Date(2000, 1))
	test(Date(1999, 8), Date(2000, 1))