code to generate a simple tic-tac-toe script :)

generate.py

INTRO_SEGMENT = """\
print('| welcome to my simple tic-tac-toe game!')
print('| take your turn by choosing a tile [1-9].')\n
"""

GRID_SEGMENT = """\
print('\\n| {0} | {1} | {2} |')
print('| {3} | {4} | {5} |')
print('| {6} | {7} | {8} |\\n')
"""

INPUT_SEGMENT = """
choice = None
while choice not in {choices}:
    choice = input('| {player} to play: ')
"""

# here are all triplets of indices to check for a won game.
# for any given triplet, if all three tiles match a
# player (either X or O) then that player has won.
WINNING_ARRANGEMENTS = (
    # horizontal lines
    (0, 1, 2),
    (3, 4, 5),
    (6, 7, 8),

    # vertical lines
    (0, 3, 6),
    (1, 4, 7),
    (2, 5, 8),

    # diagonal lines
    (0, 4, 8),
    (2, 4, 6),
)


def check_for_winner(tiles):
    for (i, j, k) in WINNING_ARRANGEMENTS:
        if tiles[i] == tiles[j] == tiles[k]:
            return tiles[i]


def write_segment(segment, depth, file):
    indent = "    " * depth
    for line in segment.splitlines():
        if line.strip():
            file.write(indent)
            file.write(line)

        file.write("\n")


def generate_turn(depth, tiles, choices, file):
    write_segment(GRID_SEGMENT.format(*tiles), depth, file)

    winner = check_for_winner(tiles)
    if winner in ("X", "O"):
        write_segment(f"\nprint('| {winner} wins!')", depth, file)
        return

    if not choices:
        write_segment("\nprint('| we have a draw!')", depth, file)
        return

    player = "XO"[depth % 2]
    segment = INPUT_SEGMENT.format(
        choices=str(choices),
        player=player
    )

    write_segment(segment, depth, file)

    for index, choice in enumerate(choices):
        expr = "if" if index == 0 else "elif"
        write_segment(f"\n{expr} choice == '{choice}':", depth, file)

        new_tiles = tiles.copy()
        new_tiles[int(choice) - 1] = player
        new_choices = tuple(c for c in choices if c != choice)

        generate_turn(depth + 1, new_tiles, new_choices, file)


def generate_code(script_name):
    tiles = list("_" * 9)
    choices = tuple("123456789")

    with open(script_name, "w") as script:
        write_segment(INTRO_SEGMENT, depth=0, file=script)
        generate_turn(0, tiles, choices, script)


if __name__ == "__main__":
    generate_code("tictactoe.py")