trojan horse program | Python Fiddle

# Version 2 To Distribute in Class:
#
# Change this version to have a variable size back yard.
#
# A Mess in the Backyard
# This Python code uses the Battleship code to simulate 
# location of dog poo in the backyard.
# May 1, 20014

# Import the random number generator.
from random import randint

# Set up the yard.  This yard will have n rows and n columns.
# Ask the player how big the backyard is.
yard_size = int(raw_input("How big is the backyard?"))
board = []
for x in range(yard_size):
    board.append(["O"] * yard_size)

# This function prints the board with spaces between each value in the row.
def print_board(board):
    for row in board:
        print " ".join(row)

# Greet the user and print out the board.
print "Did you clean the yard?"
#print_board(board)

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

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

# Call the random number generator function to locate the mess.
ship_row = random_row(board)
ship_col = random_col(board)

# ship_row and ship_col have the location of the ship.
# Delete (or comment out) this print statement before playing the game.
print "eeee-ew, watch out for the mess: Row ", ship_row, \
      " Column ", ship_col
# print ship_row
# print ship_col

# Ask the player how many times he will walk in the yard today.
# Each trip will consist of 200 steps.  Check each step to see if
# it matches location of dog mess.
#
# The number of trips will be the for-loop
n_trips = int(raw_input("How many trips into the backyard?"))

# Be sure to indent four spaces!
for trip in range(n_trips):
    print " "
    print "    Trip", trip + 1
    if trip == n_trips-1:
        print " This is your last trip."
    for i in range(200):
        step_row = random_row(board)
        step_col = random_col(board)
    
        # Check if player's step matches location of mess.
        if step_row == ship_row and step_col == ship_col:
            print "Gross! You need to clean your shoes!"
            print " Trip , ", trip+1, " Step ", i+1
            break
        else:
            if(board[step_row][step_col] == "X"):
                print "You stepped there already."
            else:
                print "You missed the mess!"
                board[step_row][step_col] = "X"
#    print_board(board)
print "Game over."

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