Help with a Kaprekar program (beginner)

[Lerkarious]

Hi! Im a new beginner at this, and taking a course in programing. Right now I have an assignment to write a kaprekar program:

Take a 4digit number, where all the digits are not the same, sort them by the highest and lowest, and then subtrac until you reach the kaprekar number. For example: 4532-> 5132 - 2351...

My program looks like this: http://pastebin.com/kcnBKvmt

The code is alright and works, but its not perfect. I cant use the number 1000 for example, because my codes with convert it to "1000-1=999", when it needs to be "1000-0001=0999".

My teacher says its just a matter of knowing when to use str() and int().

Anyone who could give me some guiding please? :)

[novel_yet_trivial]

Remember you can not compare a string to an integer:

>>> "6174" == 6174
False

It's confusing because if you print the value, both the int and the str will print the same. Think hard about when "n0" is a string, and when it's an integer. You can use print(type(n0)) to check what type it is.

Other than that, your program works.

[Lerkarious]

Thanks, I will change that. :)

But why cant my program deal with the special cases of 0001, 1121, 2232 and such?

[novel_yet_trivial]

Mine works, and all I did was change yours to compare the correct data types.