Tick-tack-toe game with python. Supports singleplayer (easy mode for now) and multiplayer!

tic_tac_toe.py

# Global variables
one = "1"
two = "2"
three = "3"
four = "4"
five = "5"
six = "6"
seven = "7"
eight = "8"
nine = "9"

# players var
player_one = "X"
player_two = "O"

# winners list
Winner = []

# resetting choice every single time
# a game is started
def choice_reset():
    global one, two, three, four, five, six, seven, eight, nine
    one = "1"
    two = "2"
    three = "3"
    four = "4"
    five = "5"
    six = "6"
    seven = "7"
    eight = "8"
    nine = "9"

#  drawing boards auto using global vars
def draw_board():
    global one, two, three, four, five, six, seven, eight, nine
    print(f" {one} | {two} | {three} ")
    print(f"---|---|---")
    print(f" {four} | {five} | {six} ")
    print(f"---|---|---")
    print(f" {seven} | {eight} | {nine} ")

# anouncements
def play_again():
    print("")
    print("Do you want to play again? (y/n)")
    if input("=> ") == "y":
        mode_selection()


def anounce_draw():
    print("It's a draw!")
    play_again()


def anounce_winner(player):
    print(f"The winner is player {player}")
    play_again()

# working with choices
def choice_availability(choice):
    global one, two, three, four, five, six, seven, eight, nine
    if choice == "1" and one == "1":
        return True
    elif choice == "2" and two == "2":
        return True
    elif choice == "3" and three == "3":
        return True
    elif choice == "4" and four == "4":
        return True
    elif choice == "5" and five == "5":
        return True
    elif choice == "6" and six == "6":
        return True
    elif choice == "7" and seven == "7":
        return True
    elif choice == "8" and eight == "8":
        return True
    elif choice == "9" and nine == "9":
        return True
    return False


def choice_selection(choice, player):
    global one, two, three, four, five, six, seven, eight, nine
    if choice == "1" and one == "1":
        one = player
        return True
    elif choice == "2" and two == "2":
        two = player
        return True
    elif choice == "3" and three == "3":
        three = player
        return True
    elif choice == "4" and four == "4":
        four = player
        return True
    elif choice == "5" and five == "5":
        five = player
        return True
    elif choice == "6" and six == "6":
        six = player
        return True
    elif choice == "7" and seven == "7":
        seven = player
        return True
    elif choice == "8" and eight == "8":
        eight = player
        return True
    elif choice == "9" and nine == "9":
        nine = player
        return True
    return False


def board_check(player):
    global one, two, three, four, five, six, seven, eight, nine
    if (one == player and two == player and three == player):
        Winner.append(player)
        return True
    elif (four == player and five == player and six == player):
        Winner.append(player)
        return True
    elif (seven == player and eight == player and nine == player):
        Winner.append(player)
        return True
    elif (one == player and four == player and seven == player):
        Winner.append(player)
        return True
    elif (two == player and five == player and eight == player):
        Winner.append(player)
        return True
    elif (three == player and six == player and nine == player):
        Winner.append(player)
        return True
    elif (one == player and five == player and nine == player):
        Winner.append(player)
        return True
    elif (three == player and five == player and seven == player):
        Winner.append(player)
        return True
    elif one != "1" and two != "2" and three != "3" and four != "4" and five != "5" and six != "6" and seven != "7" and eight != "8" and nine != "9":
        Winner.append("draw")
        return True
    return False

# for everyone
def user_input():
    global one, two, three, four, five, six, seven, eight, nine
    while True:
        Inp = input("=> ")
        if choice_availability(Inp):
            break
        print("Invalid choice!")
    return Inp


def multiplayer_game():
    global one, two, three, four, five, six, seven, eight, nine
    choice_reset()
    while True:
        draw_board()
        print(f"Player {player_one}'s turn")
        print("Select an available block (0-9)")
        choice_selection(user_input(), player_one)
        if board_check(player_one):
            break
        print("")

        draw_board()
        print(f"Player {player_two}'s turn")
        print("Select an available block (0-9)")
        choice_selection(user_input(), player_two)
        if board_check(player_two):
            break
        print("")

    print("")
    print("Last preview,")
    draw_board()
    print("")
    if Winner[-1] == "draw":
        anounce_draw()
    else:
        anounce_winner(Winner[-1])


# for multiplayer - easy mode
try:
    from random import randint
except:
    raise Exception(
        "Please make sure latest version of python 3 (3.10.8 or above) is installed!")


def easy_bot_play():
    while True:
        first_choice = randint(1, 9)
        if choice_availability(str(first_choice)):
            break
    print(f"System choosed {first_choice}")
    return str(first_choice)


def singleplayer_easy_game_first_player():
    global one, two, three, four, five, six, seven, eight, nine
    choice_reset()
    while True:
        draw_board()
        print(f"Player {player_one}'s turn")
        print("Select an available block (0-9)")
        choice_selection(user_input(), player_one)
        if board_check(player_one):
            break
        print("")

        choice_selection(easy_bot_play(), player_two)
        if board_check(player_two):
            break
        print("")

    print("")
    print("Last preview,")
    draw_board()
    print("")
    if Winner[-1] == "draw":
        anounce_draw()
    else:
        anounce_winner(Winner[-1])


def singleplayer_easy_game_second_player():
    global one, two, three, four, five, six, seven, eight, nine
    choice_reset()
    while True:

        choice_selection(easy_bot_play(), player_one)
        if board_check(player_one):
            break
        print("")

        draw_board()
        print(f"Player {player_two}'s turn")
        print("Select an available block (0-9)")
        choice_selection(user_input(), player_two)
        if board_check(player_two):
            break
        print("")
    print("")
    print("Last preview,")
    draw_board()
    print("")
    if Winner[-1] == "draw":
        anounce_draw()
    else:
        anounce_winner(Winner[-1])

# multiplayer_game()
# singleplayer_easy_game_first_player()
def singleplayer_easy():
    print("Enter your character: ")
    print("1) First character (X)")
    print("2) Second character (O)")
    print("0) Main menu")
    match input("=> "):
        case "0":
            print()
            mode_selection()
        case "1":
            print()
            singleplayer_easy_game_first_player()
        case "2":
            print()
            singleplayer_easy_game_second_player()


def mode_selection():
    print("Enter your game mode: ")
    print("1) Single player (easy)")
    print("2) Multi player")
    print("3) Statistics")
    print("0) Exit")
    print("Your choice, ")
    match input("=> "):
        case "0":
            print("Exiting...")
            exit()
        case "1":
            print()
            singleplayer_easy()
        case "2":
            print()
            multiplayer_game()
        case "3":
            print()
            print("Stats")
            print(Winner)
            print()
            mode_selection()


mode_selection()