# Test run

#1

Hi,
i was testing my code, and i got a few problems that I didn’t understand.
The first was that when I typed 3 and 4 as “coordinates” it didn’t show an error message, but it didn’t show the X, even though it should and it did before.
Second, when i typed 6 and 6 as “coordinates” it did show an error message:
Traceback (most recent call last):
File “python”, line 32, in
IndexError: list index out of range
but when i typed -1 and -1 it did everything correctly but when i type anything with 5 as “coords” it also shows this error message (I tried changing the range to 6 but that didn’t work)

``````from random import randint

board = []

for x in range(0, 5):
board.append(["O"] * 5)

def print_board(board):
for row in board:
print " ".join(row)

print_board(board)

def random_row(board):
return randint(0, len(board) - 1)

def random_col(board):
return randint(0, len(board[0]) - 1)

ship_row = random_row(board)
ship_col = random_col(board)
print ship_row
print ship_col
guess_row = int(raw_input("Guess Row: "))
guess_col = int(raw_input("Guess Col: "))

if guess_row == ship_row and guess_col == ship_col:
print "Congratulations! You sank my battleship!"
else:
print "You missed my battleship!"
board[guess_row][guess_col] == "X"
print_board(board)
if guess_row not in range(5) or guess_col not in range(5):
print "Oops, that's not even in the ocean."
elif board[guess_row][guess_col] == "X":
print "You guessed that one already."
else:
print "You missed my battleship"
``````

#2

You have a 5 x 5 matrix and the first column and row are counted as zero, so your “highest” matrix address would be (4,4). Higher than 4 is not on the matrix.

#3

thanks! I totally forgot about the zero thing

#4

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