gistfile1.py

def nextDay(year, month, day):
    """Simple version: assume every month has 30 days"""
    if day < 30:
        return year, month, day + 1
    else:
        if month == 12:
            return year + 1, 1, 1
        else:
            return year, month + 1, 1
        
def daysBetweenDates(year1, month1, day1, year2, month2, day2):
 days = 0
 nd = day1
 nm = month1
 ny = year1
 
 while not (nd == day2 and nm == month2 and ny == year2):
  (ny, nm , nd) = nextDay(ny,nm,nd)
  days += 1
 return days
 
   
 
def test():
    test_cases = [((2012,9,30,2012,10,30),30), 
                  ((2012,1,1,2013,1,1),360),
                  ((2012,9,1,2012,9,4),3)]
    
    for (args, answer) in test_cases:
        result = daysBetweenDates(*args)
        if result != answer:
            print result
            print "Test with data:", args, "failed"
        else:
            print result
            print "Test case passed!"
 
test()