def display_board(board_: list[list]) -> None:
for i in range(3):
print(" " + board_[i][0] + " │ " + board_[i][1] + " │ " + board_[i][2])
print("─────┼─────┼─────")
print("\n")
def plot(board_: list[list], input_position_: int, X_or_O_: str) -> int:
if input_position_ < 1 or input_position_ > 9:
print("Out of bounds, try again\n")
return 1
y = (input_position_ - 1) // 3
x = (input_position_ % 3) - 1
if (board_[y][x] == 'X') or (board_[y][x] == 'O'):
print("Already taken, try again\n")
return 1
board_[y][x] = X_or_O_
return 0
def win(board_: list[list], X_or_O_: str) -> bool:
# 8 total checks for 3 horizontal, 3 vertical, and 2 diagonal rows
return (board_[0][0] == X_or_O_ and board_[0][1] == X_or_O_ and board_[0][2] == X_or_O_) or\
(board_[1][0] == X_or_O_ and board_[1][1] == X_or_O_ and board_[1][2] == X_or_O_) or\
(board_[2][0] == X_or_O_ and board_[2][1] == X_or_O_ and board_[2][2] == X_or_O_) or\
(board_[0][0] == X_or_O_ and board_[1][0] == X_or_O_ and board_[2][0] == X_or_O_) or\
(board_[0][1] == X_or_O_ and board_[1][1] == X_or_O_ and board_[2][1] == X_or_O_) or\
(board_[0][2] == X_or_O_ and board_[1][2] == X_or_O_ and board_[2][2] == X_or_O_) or\
(board_[0][0] == X_or_O_ and board_[1][1] == X_or_O_ and board_[2][2] == X_or_O_) or\
(board_[2][0] == X_or_O_ and board_[1][1] == X_or_O_ and board_[0][2] == X_or_O_)
def main() -> None:
user_input = input("Press enter to play a game of tic-tac-toe / noughts-and-crosses or type 'quit' to exit the program : ").lower()
if user_input == "quit":
return
# initialise variables
board = [
['1', '2', '3'],
['4', '5', '6'],
['7', '8', '9']
]
count = 0
X_or_O = 'X'
# game start
while not win(board, X_or_O) and (count < 9):
count += 1
display_board(board)
x_turn = (count % 2 == 1)
X_or_O = ( 'X' * (x_turn) ) + ( 'O' * (not x_turn) )
print(X_or_O + "'s turn")
input_position = input("Position : ")
while type(input_position) != "int":
input_position = input("Position (must be an integer) : ")
count -= plot(board, input_position, X_or_O) # recount if move is invalid
# game end
# display results
display_board(board)
has_winner = win(board, X_or_O)
print( (X_or_O + " is the winner !\n") * (has_winner) + ("It's a tie !\n") * (not has_winner) )
main()
if __name__ == "__main__":
main()
