2.2.3 Intro to AI Python CodeHS

#Global Variables
board = [['-', '-', '-'],
        ['-', '-', '-'],
        ['-', '-', '-']]
player = "X"
flag = False
flag2 = False

#Copy your functions from the previous activities here:
#print_board, is_valid_move, place_player, take_turn
def print_board():

    n = 0
    print()
    print('   0   1   2')
    print()

    for i in board:
        print(n, end='  ')
        n += 1
        for j in i:
            print(j, end='   ')
        print()
        print()

#returns true if a row,col on the board is open
def is_valid_move(row, col):
    if row not in (0,1,2) or col not in (0,1,2):
        print("Please enter a valid move")
        return False
    if board[row][col] != "-":
        print("That spot is already taken")
        return False
    return True


#places player on row,col on the board
def place_player(player, row, col):

    board[row][col] = player

#Asks the user to enter a row and col until the user enters a valid location
#Adds user location to the board, and prints the board
def take_turn(player):
    print(f"{player}'s Turn")
    valid = False
    while not valid:
        row = int(input("Enter a row    : "))
        col = int(input("Enter a column : "))
        valid = is_valid_move(row, col)
    place_player(player, row, col)
    print_board()


#Write your check win functions here:
def check_col_win(player):
    for c in range(3):
        if board[0][c] == board[1][c] == board[2][c] == player:
            return True
    return False


def check_row_win(player):
    for r in range(3):
        if board[r][0] == board[r][1] == board[r][2] == player:
            return True
    return False



def check_diag_win(player):
    if board[0][0] == board[1][1] == board[2][2] == player:
        return True
    if board[0][2] == board[1][1] == board[2][0] == player:
        return True
    return False


def check_win(player):
    return (
        check_row_win(player) or
        check_col_win(player) or
        check_diag_win(player)
    )




def check_tie():
    for row in board:
        if "-" in row:
            return False
    return True



#Start of program
print("\t\tWelcome to Tic Tac Toe!")
print_board()

'''
DO NOT CHANGE: Tests
each test should print true if your function is written correctly:
'''
#Check row win
place_player(player, 0,0)
place_player(player, 0,1)
place_player(player, 0,2)
print_board()
print("Check Row Win: ", check_win(player))

#Check col win
board = []
for i in range(3):
    board.append(["-","-","-"])
place_player(player, 0,0)
place_player(player, 1,0)
place_player(player, 2,0)
print_board()
print("Check Col Win: ", check_win(player))

#check diag win
board = []
for i in range(3):
    board.append(["-","-","-"])
place_player(player, 0,0)
place_player(player, 1,1)
place_player(player, 2,2)
print_board()
print("Check Diag Win: ", check_win(player))

#Check Tie
board = []
for i in range(3):
    board.append(["-","-","-"])
place_player("X", 1,1)
place_player("X", 0,2)
place_player(player, 0,0)
place_player("O", 0,1)
place_player("O", 2,2)
place_player("O", 1,0)
place_player("X", 1,2)
place_player("X", 2,1)
place_player("O", 2,0)
print_board()
print("Check Tie: ", check_tie())