Projects

TikTacToe.py

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+""" 
+----------------------------------------
+Tic Tac Toe
+----------------------------------------
+This game is very popular amongst all of us a
+nd even fun to build as a Python project. I am 
+pretty sure most of us know how to play it but 
+let me give a quick brush up. 
+
+It is a two-player game and consists of a nine-square 
+grid. Each player chooses their move and with O or X 
+and marks their square one at each chance. The player 
+who succeeds in making their marks all in one line whether 
+diagonally, horizontally, or vertically wins. The challenge 
+for the other player is to block the game for their opponent 
+and also to make their chain. 
+
+For building this project in Python who can use the Pygame 
+Python library that is loaded with all computer graphics and sounds.
+----------------------------------------
+"""
+
+import random
+import sys
+
+board=[i for i in range(0,9)]
+player, computer = '',''
+
+# Corners, Center and Others, respectively
+moves=((1,7,3,9),(5,),(2,4,6,8))
+
+# Winner combinations
+winners=((0,1,2),(3,4,5),(6,7,8),(0,3,6),(1,4,7),(2,5,8),(0,4,8),(2,4,6))
+
+# Table
+tab=range(1,10)
+def print_board():
+    x=1
+    for i in board:
+        end = ' | '
+        if x%3 == 0:
+            end = ' \n'
+            if i != 1: end+='---------\n';
+        char=' '
+        if i in ('X','O'): char=i;
+        x+=1
+        print(char,end=end)
+
+def select_char():
+    chars=('X','O')
+    if random.randint(0,1) == 0:
+        return chars[::-1]
+    return chars
+
+def can_move(brd, player, move):
+    if move in tab and brd[move-1] == move-1:
+        return True
+    return False
+
+def can_win(brd, player, move):
+    places=[]
+    x=0
+    for i in brd:
+        if i == player: places.append(x);
+        x+=1
+    win=True
+    for tup in winners:
+        win=True
+        for ix in tup:
+            if brd[ix] != player:
+                win=False
+                break
+        if win == True:
+            break
+    return win
+
+def make_move(brd, player, move, undo=False):
+    if can_move(brd, player, move):
+        brd[move-1] = player
+        win=can_win(brd, player, move)
+        if undo:
+            brd[move-1] = move-1
+        return (True, win)
+    return (False, False)
+
+# AI goes here
+def computer_move():
+    move=-1
+
+    # If I can win, others do not matter.
+    for i in range(1,10):
+        if make_move(board, computer, i, True)[1]:
+            move=i
+            break
+    if move == -1:
+
+    # If player can win, block him.
+        for i in range(1,10):
+            if make_move(board, player, i, True)[1]:
+                move=i
+                break
+
+    if move == -1:
+    # Otherwise, try to take one of desired places.
+        for tup in moves:
+            for mv in tup:
+                if move == -1 and can_move(board, computer, mv):
+                    move=mv
+                    break
+    return make_move(board, computer, move)
+
+def space_exist():
+    return board.count('X') + board.count('O') != 9
+player, computer = select_char()
+print('Player is [%s] and computer is [%s]' % (player, computer))
+result='%%% Deuce ! %%%'
+while space_exist():
+    print_board()
+    print('#Make your move ! [1-9] : ', end='')
+    move = int(input())
+    moved, won = make_move(board, player, move)
+    if not moved:
+        print(' >> Invalid number ! Try again !')
+        continue
+
+    if won:
+        result='*** Congratulations ! You won ! ***'
+        break
+    elif computer_move()[1]:
+        result='=== You lose ! =='
+        break;
+        
+print_board()
+print(result)