[Tutor] Building Starships -- object of type 'int' has no len()

[Danny Yoo]

>
> lens = [0] * len(catalog2[0])


Ah.  Read the following closely:

    https://docs.python.org/2/faq/programming.html#how-do-i-create-a-multidimensional-list


If you have any questions, please feel free to ask further.  See if
that clears up the mistake that's in your code.