sumDigits.py

def sumDigits(number):
    stringRepresentation = str(number)
    total = 0
    if(number < 10):
        return number
    for digit in stringRepresentation:
        total += int(digit)
    return sumDigits(total)
def main():
    while(True):
        try:
            num = (raw_input("Enter Number: "))
            num = int(num)
            print str(sumDigits(num))
        except Exception as a:
            print a
            print("That is not a number")
main()