Tic tac toe but o not printing :'(

import random

botin1 = random.randint(1, 9) - 1
botin2 = random.randint(1, 9) - 1
botin3 = random.randint(1, 9) - 1
botin4 = random.randint(1, 9) - 1
botin5 = random.randint(1, 9) - 1

#--------GLobal Variables--------

Board = ["-","-","-",
         "-","-","-",
         "-","-","-",]

Winner = None
game_running = True
current_player = "X"

#--------Display board--------
def show_board():
    print(Board[0] + "|" + Board[1] + "|" + Board[2])
    print(Board[3] + "|" + Board[4] + "|" + Board[5])
    print(Board[6] + "|" + Board[7] + "|" + Board[8])

#--------running the game-------

def play_game():
    show_board()

    while game_running:
        user_input_turn(current_player)
        checking_if_game_over()
        switch_player()
    if Winner == "X" or Winner == "O":
        print(Winner + " won.")
    elif Winner == None:
        print("tie")
#--------Win or Tie---------

def checking_if_game_over():
    check_for_winner()
    check_if_tie()

def check_for_winner():
    global Winner
    #check rows
    row_winner = check_rows()
    #check columns
    column_winner = check_columns()
    #check diags
    diag_winner = check_diags()

    #check the winner
    if row_winner:
        Winner = row_winner
    elif column_winner:
        Winner = column_winner
    elif diag_winner:
        Winner = diag_winner
    return
def check_rows():
    global game_running
    row_1 = Board[0] == Board[1] == Board[2] != "-"
    row_2 = Board[3] == Board[4] == Board[5] != "-"
    row_3 = Board[6] == Board[7] == Board[8] != "-"
    if row_1 or row_2 or row_3:
        game_running = False
        if row_1:
            return Board[0]
        if row_2:
            return Board[3]
        if row_3:
            return Board[7]
    return

def check_columns():
    global game_running
    column_1 = Board[0] == Board[3] == Board[6] != "-"
    column_2 = Board[1] == Board[4] == Board[7] != "-"
    column_3 = Board[2] == Board[5] == Board[8] != "-"
    if column_1 or column_2 or column_3:
        game_running = False
        if column_1:
            return Board[0]
        if column_2:
            return Board[1]
        if column_3:
            return Board[2]
    return

def check_diags():
    global game_running
    diag_1 = Board[0] == Board[4] == Board[8] != "-"
    diag_2 = Board[2] == Board[4] == Board[6] != "-"
    if diag_1 or diag_2:
        game_running = False
        if diag_1:
            return Board[0]
        if diag_2:
            return Board[2]
        return

#------checking tie------
def check_if_tie():
    global  game_running

    if "-" not in Board:
        game_running = False
    return

#------User move----------

def user_input_turn(player):
    print(player + "'s turn.")
    if current_player == "O":
        if Board.count("X") == 1:
            position = botin1
        elif Board.count("X") == 2:
            position = botin2
        elif Board.count("X") == 3:
            position = botin3
        elif Board.count("X") == 4:
            position = botin4
        elif Board.count("X") == 5:
            position = botin5
        valid = False
        while not valid:
            if Board.count("X") == 5:
                position = botin1
            elif Board.count("X") == 4:
                position = botin2
            elif Board.count("X") == 1:
                position = botin3
            elif Board.count("X") == 2:
                position = botin4
            elif Board.count("X") == 3:
                position = botin5
        if Board[position] == "-":
              valid = True
        else:
            valid = False
        Board[position] = player
    else:
        position = input("Choose a position from 1 to 9: ")
        valid = False
        while not valid:
            while position not in ["1", "2", "3", "4", "5", "6", "7", "8", "9"]:
                print("Please put an integer between 1 and 9 :(")
                position = input("Choose a position from 1 to 9: ")
            position = int(position) - 1
            if Board[position] == "-":
                valid = True
            else:
                print("You can't go there,choose an empty position")
        Board[position] = player

    show_board()

#------Switching current player-------

def switch_player():
    global current_player
    if current_player == "X":
        current_player = "O"
    else:
        current_player = "X"
    return

play_game()