# Error when code seems fine?

#1

Error comes when I input row = 4 and column = 5
error: Traceback (most recent call last):
File "python", line 40, in
IndexError: list index out of range

``````from random import randint

board = []

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

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

print "Let's play Battleship!"
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

# Everything from here on should go in your for loop!
# Be sure to indent four spaces!
for turn in range(4):
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 sunk my battleship!"
print "Turn", (turn + 1)
break
else:
if (guess_row < 0 or guess_row > 5) or (guess_col < 0 or guess_col > 5):
print "Oops, that's not even in the ocean."
print "Turn", (turn + 1)
elif (board[guess_row][guess_col] == "X"):
print "You guessed that one already."
print "Turn", (turn + 1)
else:
print "You missed my battleship!"
board[guess_row][guess_col] = "X"
print "Turn", (turn + 1)
if turn == 3:
print "Game Over"
print_board(board)``````

#2

What code is responsible for checking bounds?
Is 5 within the board?
Is 5 allowed by your bounds check?

#3

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