Merge pull request #357 from Rahul5430/main

added tic-tac-toe #325

Games/Python/Tic Tac Toe/tictactoe.py

@@ -0,0 +1,133 @@
+import random
+
+board = [' ' for x in range(10)]
+
+
+def insertletter(letter, pos):
+    board[pos] = letter
+
+
+def freespace(pos):
+    return board[pos] == " "
+
+
+def printboard(board):
+    print("   |   |   ")
+    print(" " + board[1] + " | " + board[2] + " | " + board[3])
+    print("   |   |   ")
+    print("~~~~~~~~~~~")
+    print("   |   |   ")
+    print(" " + board[4] + " | " + board[5] + " | " + board[6])
+    print("   |   |   ")
+    print("~~~~~~~~~~~")
+    print("   |   |   ")
+    print(" " + board[7] + " | " + board[8] + " | " + board[9])
+    print("   |   |   ")
+
+
+def fullboard(board):
+    if board.count(" ") > 1:
+        return False
+    else:
+        return True
+
+
+def iswinner(b, l):
+    return ((b[1] == l and b[2] == l and b[3] == l) or
+    (b[4] == l and b[5] == l and b[6] == l) or
+    (b[7] == l and b[8] == l and b[9] == l) or
+    (b[1] == l and b[4] == l and b[7] == l) or
+    (b[2] == l and b[5] == l and b[8] == l) or
+    (b[3] == l and b[6] == l and b[9] == l) or
+    (b[1] == l and b[5] == l and b[9] == l) or
+    (b[3] == l and b[5] == l and b[7] == l))
+
+
+def playermove():
+    run = True
+    while run:
+        move = input("Please select a position to enter X between 1 to 9")
+        try:
+            move = int(move)
+            if 0 < move < 10:
+                if freespace(move):
+                    run = False
+                    insertletter('X', move)
+                else:
+                    print("Sorry this space is occupied")
+            else:
+                print("Please type a number between 1 and 9")
+        except:
+            print("Please type a number")
+
+
+def computermove():
+    possiblemoves = [x for x, letter in enumerate(board) if letter == ' ' and x != 0]
+    move = 0
+    for let in ['O', 'X']:
+        for i in possiblemoves:
+            boardcopy = board[:]
+            boardcopy[i] = let
+            if iswinner(boardcopy, let):
+                move = i
+                return move
+    cornersopen = []
+    for i in possiblemoves:
+        if i in {1, 3, 7, 9}:
+            cornersopen.append(i)
+    if len(cornersopen) > 0:
+        move = selectrandom(cornersopen)
+        return move
+    if 5 in possiblemoves:
+        move = 5
+        return move
+    edgesopen = []
+    for i in possiblemoves:
+        if i in {2, 4, 6, 8}:
+            edgesopen.append(i)
+    if len(edgesopen) > 0:
+        move = selectrandom(edgesopen)
+        return move
+
+
+def selectrandom(li):
+    ln = len(li)
+    r = random.randrange(0, ln)
+    return li[r]
+
+
+def main():
+    print("Welcome to the game")
+    printboard(board)
+
+    while not(fullboard(board)):
+        if not(iswinner(board, 'O')):
+            playermove()
+            printboard(board)
+        else:
+            print("Sorry you lose")
+            break
+
+        if not(iswinner(board, 'X')):
+            move = computermove()
+            if move == 0:
+                print("Tie Game")
+            else:
+                insertletter('O', move)
+                print(f"Computer placed 0 on position {move}")
+                printboard(board)
+        else:
+            print("You Win!")
+            break
+
+    if fullboard(board):
+        print("Tie Game")
+
+
+while True:
+    x = input("Do you want to play again? {y/n} : ")
+    if x.lower() == 'y':
+        board = [' ' for x in range(10)]
+        main()
+    else:
+        break