class Appointment:

    def __init__(self, purpose, location, hour, minute):
        self.purpose = purpose
        self.location = location
        self.hour = hour
        self.minute = minute

    def __str__(self):
        return '''Purpose: {0:s}
Location: {1:s}
Time: {2:02d}:{3:02d}'''.format( \
self.purpose, self.location, self.hour, self.minute)