python question

A checksum is a single number that can act as a kind of digital signature of a long string. Just like how two people will have different handwritten signatures, two strings can have two different digital signatures. There are many ways to calculate the checksum of any arbitrary string; the more complex the calculation, the less likely it is for two strings to have the same checksum value. You will calculate the checksum according to the following algorithm. First, sum the Unicode values of each character in the string. Second, take the sum modulo 10. This will be the checksum of the string The ord() function, when given a single character, returns the Unicode value of that character.

(Hint: do not pass the entire string to the ord() function, it will not do what you want.

) Example Test Case: checkSum(cat) returns 2