TicTacToe Program

import random

#Not Working as intended

#Simple TicTacToe program

def printBoard(Board): # Prints out the Board

    Board.setdefault('top-l', ' ')
    Board.setdefault('top-m', ' ')
    Board.setdefault('top-r', ' ')
    Board.setdefault('mid-l', ' ')
    Board.setdefault('mid-m', ' ')
    Board.setdefault('mid-r', ' ')
    Board.setdefault('bot-l', ' ')
    Board.setdefault('bot-m', ' ')
    Board.setdefault('bot-r', ' ')

    print (Board['top-l'], '|', Board['top-m'], '|', Board['top-l'])
    print('---------')
    print (Board['mid-l'], '|', Board['mid-m'], '|', Board['mid-l'])
    print('---------')
    print (Board['bot-l'], '|', Board['bot-m'], '|', Board['bot-l'])

    return None


def modifyGameState(Board, plrChar, botChar): #Gets the bot's and the player's choice and applies them to the Board dict
                                                                                    #I think this is the wrong function
    while True:

        checks = 0

        plrSelection = input('''What's your move? (top-, mid-, bot- & l, m, r) ''').lower()
        botSelection = random.choice([k for k,v in Board.items() if v == ' '])

        if Board.get(plrSelection, 0) == ' ':
            checks += 1

        else:
            print('This position is occupied!')

        if Board.get(botSelection, 0) == ' ' and botSelection != plrSelection:
            checks += 1


        if checks == 2:

            Board[plrSelection] = plrChar
            Board[botSelection] = botChar

            break

    return None


def getPlrChar(): #Gets the player's X or O

    while True:

        plrChar = input('''Do you want to be X or O? ''').upper()
        if plrChar == 'X' or plrChar == 'O':
            break

        else:
            print('''That's not a valid Character''')

    return plrChar


def checkWinner(Board, plrChar, botChar): #Checks if Someone Won and if so Who

    if Board['top-l'] == Board['top-m'] == Board['top-r'] and (Board['top-l'] == plrChar or Board['top-l'] == botChar):

        if Board['top-l'] == plrChar:

            print('The Player Wins!')
            return True

        else:

            print('The Machine Wins!')
            return True

    if Board['mid-l'] == Board['mid-m'] == Board['mid-r'] and (Board['mid-l'] == plrChar or Board['mid-l'] == botChar):

        if Board['mid-l'] == plrChar:

            print('The Player Wins!')
            return True

        else:

            print('The Machine Wins!')
            return True


    if Board['bot-l'] == Board['bot-m'] == Board['bot-r'] and (Board['bot-l'] == plrChar or Board['bot-l'] == botChar):

        if Board['bot-l'] == plrChar:

            print('The Player Wins!')
            return True

        else:

            print('The Machine Wins!')
            return True


    if Board['top-l'] == Board['mid-l'] == Board['bot-l'] and (Board['top-l'] == plrChar or Board['top-l'] == botChar):

        if Board['top-l'] == plrChar:

            print('The Player Wins!')
            return True


    if Board['top-m'] == Board['mid-m'] == Board['bot-m'] and (Board['top-m'] == plrChar or Board['top-m'] == botChar):

        if Board['top-m'] == plrChar:

            print('The Player Wins!')
            return True

        else:

            print('The Machine Wins!')
            return True


    if Board['top-r'] == Board['mid-r'] == Board['bot-r'] and (Board['top-r'] == plrChar or Board['top-r'] == botChar):

        if Board['top-r'] == plrChar:

            print('The Player Wins!')
            return True

        else:

            print('The Machine Wins!')
            return True


    if Board['top-l'] == Board['mid-m'] == Board['bot-r'] and (Board['top-l'] == plrChar or Board['top-l'] == botChar):

        if Board['top-l'] == plrChar:

            print('The Player Wins!')
            return True

        else:

            print('The Machine Wins!')
            return True


    if Board['top-r'] == Board['mid-m'] == Board['bot-l'] and (Board['top-r'] == plrChar or Board['top-r'] == botChar):

        if Board['top-l'] == plrChar:

            print('The Player Wins!')
            return True

        else:

            print('The Machine Wins!')
            return True


# Functions: printBoard() modifyGameState() getPlrChar() CheckWinner()


daBoard = {}
playerChar = getPlrChar()

if playerChar == 'X':
    robotChar = 'O'

else:
    robotChar = 'X'

print('Let the games Begin!')
while True:
    printBoard(daBoard)
    modifyGameState(daBoard, playerChar, robotChar)

    if checkWinner(daBoard, playerChar, robotChar) is True:
        break