Python Tic-Tac-Toe Game script
Run a terminal Tic-Tac-Toe game in Python. Learn board state management, turn switching, and win condition checks.
How it Works
Building a game of Tic-Tac-Toe is a classic exercise that reinforces matrix board state representation, loop structures, and conditional comparison logic.
The board is represented as a 3x3 matrix (or a flat list of 9 elements). Two players take turns placing their symbols ('X' or 'O') on the grid. After each move, the script checks if a player has three matching symbols in a row, column, or diagonal.
This implementation includes a game loop that switches active player states, accepts coordinate placements, and automatically stops once a win or tie condition is encountered.
Source Code
A fully functional command line Tic-Tac-Toe game engine running a simulated session.
def print_board(board):
for i in range(3):
row = " | ".join(board[i*3:(i+1)*3])
print(f" {row} ")
if i < 2:
print("---+---+---")
def check_win(board, player):
win_states = [
[0, 1, 2], [3, 4, 5], [6, 7, 8], # Rows
[0, 3, 6], [1, 4, 7], [2, 5, 8], # Columns
[0, 4, 8], [2, 4, 6] # Diagonals
]
return any(all(board[pos] == player for pos in state) for state in win_states)
def play_tic_tac_toe():
board = [str(i+1) for i in range(9)]
# Simulated sequence of moves (X and O alternating)
moves = [4, 0, 8, 2, 7, 6, 3]
print("Welcome to Tic-Tac-Toe!\n")
print_board(board)
print("\nSimulating Gameplay...")
current_player = 'X'
for move in moves:
if board[move] not in ['X', 'O']:
board[move] = current_player
print(f"\nPlayer {current_player} places on {move+1}:")
print_board(board)
if check_win(board, current_player):
print(f"\nPlayer {current_player} wins the game!")
return
current_player = 'O' if current_player == 'X' else 'X'
print("\nGame ends in a draw!")
play_tic_tac_toe()Welcome to Tic-Tac-Toe!
1 | 2 | 3
---+---+---
4 | 5 | 6
---+---+---
7 | 8 | 9
Simulating Gameplay...
Player X places on 5:
1 | 2 | 3
---+---+---
4 | X | 6
---+---+---
7 | 8 | 9
Player O places on 1:
O | 2 | 3
---+---+---
4 | X | 6
---+---+---
7 | 8 | 9
... (moves continue)
Player X wins the game!Real-world Applications
- Interactive command line interface loops
- Simple artificial intelligence minimax routing prototypes
- Learning 2D list array coordinate mappings
Frequently Asked Questions
How can I play against the computer?
To implement an AI opponent, you can use Python's `random` module to select free slots on the board, or use the Minimax algorithm to create an unbeatable opponent.
How do I clear the terminal screen between turns?
You can import `os` and call `os.system('cls' if os.name == 'nt' else 'clear')` to clear standard terminal viewports.