frrr

that is illegal i*2 is simply superior

thank you for the docstrings that lets noobs like me learn :)

Cleber

The solution was written in Python 2. Python 3 only has range, which is what xrange was in Python 2.

Clean. How did you make that xrange work? As I know is simply "range"

omg , it 's really hurt when i finally come to a possible but not elegant solution

Nice! very clean.

great job

str(digits[x]*2) - gives you a string, it consist of one or two characters

map( int, str(digits[x]*2) ) - transform your string to an int array

sum ( ---- ) takes sum of the elements, if the multiplication result is single digit then sum of array's elements equal to the element value. if the multiplication result is two digits then it takes sum of it, like should be described by the algorithm

How does this approach handle when the resulting "digit" after multiplying by 2 is greater than 9?

Ahhhhhhhhhhhh. Nice job, this looks very clean.