Hi - my best advice would be to read the helpful Python docs; try to copy the example code given in your local IDE, and also Google any new concepts/words that you don't understand.

After you read Sections 8.1 to 8.4 of this page, you should find your answer!

https://docs.python.org/3/tutorial/errors.html

This kata uses typing. Most Python katas don't. Look at the documentation of this module if you face another difficulty with this.

The tuple is named info.

You will never receive an array with only one digit repeated n times

This means that you won't get arrays like these:

[1, 1, 1, 1]
[5, 5, 5, 5, 5, 5, 5]
[0, 0, 0]

for the input arr = ['9', '8', '8', '7', '6', '1', '0', '0', '0', '0'] I get the list [75600, 167889, 9887610000].

Looks good to me.