Error on Sort function code

Question

I received ERROR from following Code, anyone know what is the problem ?

ERROR Screenshot:
https://ufile.io/jpb1n

Code:
https://code.sololearn.com/czS0c7LpL29J/?ref=app

Answer 1

https://code.sololearn.com/cZ03E87cz9Du/?ref=app

Answer 2

As you can see in error message
' In [50]: _is_sorted_sample_("i am nima") '
I can see here that you passed an argument that is a type of string and your code will only work with arguments that type of list.
So try passing a different argument like ["i", "am", "nima"] and tell me the output you get.

Answer 3

Maybe just change the name of function, because it's a bit wierd to start a name with underscore. I really have no other ideas. Hope you won't have more problems because I gotta go now, it's late night here.

Answer 4

Could you post the whole code

Answer 5

the output of ["i", "am", "nima"]

https://ufile.io/5xtlq

Answer 6

Thanks Tim

By adding print to the code, ERROR solved

but in many functions without print (with only using return) I had no ERROR ...