Test Run debugging help requested


#1



https://www.codecademy.com/courses/python-beginner-en-4XuFm/1/5?curriculum_id=4f89dab3d788890003000096


I've attempted to solve this on my own for quite some time now - but to no avail. Whenever i execute my code to test that my "Oops, that's not even in the ocean." message will display properly should numbers that are out of range be entered, it fails - giving me this.

Traceback (most recent call last):
File "python", line 27, in
IndexError: list index out of range


I would be indebted if someone could explain precisely what i am doing wrong - everything else in the code seems to be functioning correctly.


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)
guess_row = int(raw_input("Guess Row:"))
guess_col = int(raw_input("Guess Col:"))

print ship_row
print ship_col

board[X][guess_row]
board[X][guess_col]
# Write your code below!    
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."
elif 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)


#2

What is X, and what are these two lines supposed be doing?


#3

...Interesting, I distinctly remember putting that into the code due to a some difficulty with "Danger Will Robinson" and the hint segment saying the following:
To specify a single element in a 2-dimensional list, you need to give two indices. The syntax is: list_name[i][j], where i is an element in the outer list and j is an element in the inner list.

I also recall it specifically not working until i put that part of the code in, but cannot recreate that now. Perhaps a bug or some form of delusion caused by the sleep deprived state i was in during that segment, Either way, removing those two lines fixed my issue.

Thanks.


#4

This topic was automatically closed 7 days after the last reply. New replies are no longer allowed.