valueOne = False
valueTwo = False
def getInteger(number):
    while number == False or lenFirstInput != 1:
        firstInput = input('Enter a valid integer: ')
        number = firstInput.isdigit()
        lenFirstInput = len(firstInput)
        if(number == False or lenFirstInput != 1):
            print('That is not a single number, please try again.')
        else:
            intFirstInput = int(firstInput)
            print('intFirstInput == ' + str(intFirstInput))
            return intFirstInput

getInteger(valueOne) #Prints entered integer.
getInteger(valueTwo)