Tic Tac Toe Game

Author: OmkarPathak

Programs/P75_TicTacToe.py

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+# Author: OMKAR PATHAK
+
+# A simple example of tic tac toe game
+
+# For storing user choices
+choices = []
+
+# For initializing the board with numbers
+for i in range(0, 9):
+    choices.append(str(i))
+
+firstPlayer = True
+winner = False
+iterations = 0      # To terminate the loop
+
+# For drawing board on to the terminal
+def printBoard():
+    print('\n=============')
+    print('| ' + choices[0] + ' | ' + choices[1] + ' | ' + choices[2] + ' |')
+    print('=============')
+    print('| ' + choices[3] + ' | ' + choices[4] + ' | ' + choices[5] + ' |')
+    print('=============')
+    print('| ' + choices[6] + ' | ' + choices[7] + ' | ' + choices[8] + ' |')
+    print('=============\n')
+
+# Play the game while the winner is not decided or the game is drawn
+while not winner and iterations < 9:
+    printBoard()
+
+    iterations += 1
+
+    if firstPlayer == True:
+        print('Player 1: ', end = '')
+    else:
+        print('Player 2: ', end = '')
+
+    try:
+        playerInput = int(input())
+    except:
+        print('Please enter a valid number from the board')
+        continue
+
+    # Check if userInput already has 'X' or 'O'
+    if choices[playerInput] == 'X' or choices[playerInput] == 'O':
+        print('Illegal move, try again!')
+        continue
+
+    if firstPlayer:
+        choices[playerInput] = 'X'
+    else:
+        choices[playerInput] = 'O'
+
+    firstPlayer = not firstPlayer
+
+    # Winning conditions
+    for index in range(0, 3):
+        # For [0,1,2], [3,4,5], [6,7,8]
+        if (choices[index * 3] == choices[((index * 3) + 1)] and choices[index * 3] == choices[((index * 3) + 2)]):
+            winner = True
+            printBoard()
+
+        # For [0,3,6], [1,4,7], [2,5,8]
+        if(choices[index] == choices[index + 3] and choices[index + 3] == choices[index + 6]):
+            winner = True
+            printBoard()
+
+    if((choices[0] == choices[4] and choices[4] == choices[8]) or
+      (choices[2] == choices[4] and choices[4] == choices[6])):
+        winner = True
+        printBoard()
+
+if winner:
+    print('Player ' + str(int(firstPlayer + 1)) + ' wins!')
+else:
+    print('Game drawn')