tic_tac_toe_python.py

# -*- coding: utf-8 -*-
"""Tic-Tac-Toe-python.ipynb

Automatically generated by Colaboratory.

Original file is located at
    https://colab.research.google.com/drive/1Fpw-WJ8rNRJMBQEELLn3a8uW6NpxS5ii
"""

import random

# Function for printing the Tic-Tac-Toe board
def print_board(board):
    print(" " + "-" * 13)  # Printing the top border of the board
    for i in range(3):
        # Printing each row of the board with cell values
        print(f"| {board[i][0]} | {board[i][1]} | {board[i][2]} |")
        print("|---|---|---|")  # Printing the separator between rows
    print(" " + "-" * 13)  # Printing the bottom border of the board

# Function to check if a player has won
def checking_winner(board, symbol):
    for row in board:
        # Checking if all cells in a row have the same symbol
        if all(cell == symbol for cell in row):
            return True

    for col in range(3):
        # Checking if all cells in a column have the same symbol
        if all(board[row][col] == symbol for row in range(3)):
            return True

    # Checking if all cells in a diagonal have the same symbol
    if all(board[i][i] == symbol for i in range(3)) or all(board[i][2 - i] == symbol for i in range(3)):
        return True

    return False

# Function to check if the board is full
def is_board_full(board):
    # Checking if all cells in the board are filled
    return all(cell != ' ' for row in board for cell in row)

# Function for the player to make a move
def player_move(board, symbol):
    while True:
        try:
            # Get the player's move as input
            move = int(input(f"Enter your move (1-9) for {symbol}: "))
            if 1 <= move <= 9:
                # Convert the move to row and column indices
                row, col = divmod(move - 1, 3)
                if board[row][col] == ' ':
                    # If the cell is empty, place the player's symbol
                    board[row][col] = symbol
                    break
                else:
                    print("Cell already taken. Try again.")
            else:
                print("Invalid move. Enter a number between 1 and 9.")
        except ValueError:
            print("Invalid input. Please enter a number.")

# Function for the computer to make a move
def computer_move(board, symbol):
    # Find all empty cells on the board
    empty_cells = [(i, j) for i in range(3) for j in range(3) if board[i][j] == ' ']
    # Choose a random empty cell for the computer's move
    return random.choice(empty_cells)

# Function to play the Tic-Tac-Toe game
def play_game():
    board = [[' ' for _ in range(3)] for _ in range(3)]  # Initializing an empty 3x3 board
    symbols = ['X', 'O']  # Defining player symbols
    current_symbol = symbols[0]  # Start with the first player's symbol

    print("Welcome to Tic-Tac-Toe!\n")
    print_board(board)  # Printing the initial empty board

    for _ in range(9):  # Maximum of 9 moves in a game
        if current_symbol == 'X':
            player_move(board, current_symbol)  # Player's turn
        else:
            row, col = computer_move(board, current_symbol)  # Computer's turn
            board[row][col] = current_symbol
            print(f"\nComputer chooses position {row * 3 + col + 1} ({current_symbol})\n")

        print_board(board)  # Printing the updated board

        if checking_winner(board, current_symbol):
            print(f"\nHooray! {current_symbol} wins!\n")
            break
        elif is_board_full(board):
            print("\nAhh,It's a tie!\n")
            break

        current_symbol = symbols[1] if current_symbol == symbols[0] else symbols[0]  # Switch player symbols

if __name__ == "__main__":
    play_game()  # Start the Tic-Tac-Toe game when the script is executed