# Erle Robotics Learning Python GitBook Free

## Solution:Battleship

Create Battleship.pyand copy this code:

#Battleship!
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)

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!"
break
else:
if turn==3:
print "Game Over"

elif (guess_row < 0 or guess_row > 4) or (guess_col < 0 or  guess_col > 4):
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!"
board[guess_row][guess_col] = "X"
print "Turn:",turn+1
print_board(board)


Execute it with python Battleship.py:

  root@erlerobot:~/Python_files# python Battleship.py
Let's play Battleship!
O O O O O
O O O O O
O O O O O
O O O O O
O O O O O
Guess Row: