Revision 3233e951-63a2-45bb-8f50-0b12e7897b28 - Stack Overflow

I'm trying to solve this problem:

> Enter two numbers from keyboard with at least three digits.
>
> Print the number that have the digits sum greater.

Inside of a function I have tried to print the values of variables.
The values of those variables is not printed, so I think that the function is not being executed.

 a = input('\n Enter the first number : ' )
 x = sum([a])
 print('\n The sum of the digits number ' +str(x)+ ' este : %d' %x)

 b = input('\n Enter the second number : ')
 y = sum([b])
 print('\n The sum of the digits number ' +str(y)+ ' este : %d' %y)

 def sum(param):
 var = 0
 while(param != 0):
 var += (param % 10)
 print(var)
 param /= 10
 print(param)
 return var