TypeError: sequence item 0: expected string, NoneType found

Question

I\'m trying to improve a game of battleships. The original version works fine with no errors. I have written code to help overcome the fact that the first version places the shi

Answer 1

If you've arrived here because you were looking for the root cause of "TypeError: sequence item 0: expected string, NoneType found", it can come from doing something along these lines...

','.join([None])