You can see there also the test it fails: test.assert_equals(snail([[]]), [])

It's great that you ask for help and provide something to use: the error messages. They tell you that in line 11 you are trying to access a value at an index that is invalid for the container from which you are trying to access. I can't tell whether it is jmin that cannot be found in snail_map or whether i cannot be found in snail_map[jmin], but that is how you can figure out what's wrong. I hope this helps you debug. Questions?

Start by printing the input to see which input makes your code fail.

From the code I can see, wrong datatype and a string is not an instance of int, so your code returns None. There is no long type in Python either (at least since 3.x). The function's name should be descending_order instead of ordenar too.

Uh, no idea then. We cannot help, we are sorry.

Unless you show. Your. Code. Se we can, you know, fix the kata.

Probably:

• Printing instead of returning
• Different data type

Kata is OK, and your code is most probably incorrect. Show us your code and we will tell you what's wrong with it.

115,370 completions say otherwise. Can you elaborate which test case you think is wrong?