FAQ: Learn Python - Battleship - Hide


This community-built FAQ covers the “Hide” exercise in Codecademy’s lessons on Python.

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In the instructions it says we should use ‘board_in’, so I did in the previous parts of this Battleship exercise.
That all went well, but now suddenly, when I come at part 7/19, the ‘board_in’ is replaced by you to ‘board’.

I have looked further, as well as clicked the ‘solutions’ several times, and the whole ‘board_in’ argument has disappeared from the code, however in the instructions it still says ‘board_in’.

This is so confusing!
Why has it changed?


it should be board_in, i will pass this along so the solutions get fixed. Thank you for reporting

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Why are two functions needed? Don’t they accomplish the same thing?


for now they do, but whatever the dimensions of the board change and the board is no longer a square?


Good point. I modified mine in the later Extra Credit lesson to have a random number function that takes an argument for the range of the random number and have variables defining the board width and height, but it required changing other code too.


which is what you try to prevent!


Why do you need to minus 1 from the randint function
why is the code like this:
return randint(0, len(board_in)-1)

and not just like this:
return randint(0, len(board_in))


because len() starts counting at one, while lists are zero indexed based. So a list which has 5 elements (so length 5), has 4 as it highest index (all indices: 0, 1, 2, 3 and 4)

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The problem with the instructions on the Hide lesson in Battleship has not been resolved. The instruction call for board_in but it is replaced by board.


it still haven’t been cahnged