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

[Terry--gmail]

I'm copy and pasting from Ninja-IDE, which I thought was created 
specifically to do python programming...so I never checked to see if it 
needs to have the tab set to enter 4 spaces, as it appeared visually to 
be doing that.  But, I don't remember whether I used their tab or 
manually typed 4 spaces. SO, I have typed the lines below in manually:

for line_number, row in enumerate(catalog2):
     for col, item in enumerate(row):
         if lens[col] < len(item):
         lens[col] = len(item)

How's that?

--Terry