Code Tic Tac Toe in Tkinter - pt. 4! Program win, loss, game over in Python for a playable GUI game!

what's going on you guys welcome back to the channel and today's video is going to be a continuation in our building tic-tac-toe in uh python using kinter um so this is an introduction to graphical user interfaces or guis and this is part four in this series so if you haven't checked out the first three be sure to go back and do that if this is something you want to follow along with line for line the game we've built so far is uh you select a character to play as and then once you hit start it draws this game board you go ahead and select characters the computer plays against you and then um ultimately it just fills in the board you can reset it but we haven't created the code to track when the game is actually over and if you win or lose yet so that's what we'll be tackling in this video before i do get into it if you do find this useful then please go ahead and leave a subscribe to the channel and a like on the video it helps me out a ton and if you have any questions or comments just be sure to let me know about in the comments below and i'll get back to you as soon as possible all right so for this video we're going to be handling game over scenarios so i'm going to start by creating a new variable and i'm going to call it game over and we're just going to set equal to false when the game starts and then when the board is drawn as well because this is kind of where we handle this is where we handle uh reset logic so like after the game is over you'd hit the button again if you wanted to play another round so we're gonna do the same thing we're gonna set equal to false when you enter there but then both places that uh both places that turn can happen so whether the player is taking a turn or the ai is taking a turn we're gonna call a function that i'm gonna call uh check game over and we're actually gonna use that to check game over status so we need to pass in the positions table because we're going to send it all of the moves that have been made in the game as a variable for it and we're going to use this thing to actually check the status of game over so let's go ahead and copy this line here and another thing you know how before we were saying well if it's the player's turn and there's less than nine turns total we want to let them take a move now we're going to say also and game over is false because there's no sense letting the player or the computer take a turn if game over is true so uh we'll include that in our player function and our ai function as well we'll go ahead and do the same thing here and game over is false which means we're going to need to call in the game over variable you could absolutely all these things i called in as globals you could absolutely pass minutes parameters that's totally valid too some people would even argue it's better i just do it this way because it works for me and then we're going to use the exact same check game over here which means we have to obviously come up and make the game over checker so let's call it define check game over right and both of them are going to be passing in the positions table so we will do the same and actually since we're going to be typing it quite a lot i'm just going to call it pos because as you'll see once we get into it there's going to be a lot of different conditions that could make you win and so it's going to save us a lot of typing time to just be able to say pos so we'll pull in game over as well because that's what we're actually checking and setting but now let's take a look at scenarios that could actually end the game so the first one i'm going to take a look at is actually just the first row across so that's zero one and two in your positions table and if you add those three together and you get xxx then uh that's one scenario where the game is one right and then a second one would be the second row so three four and five and so if you get what's going on here um you might wanna skip a couple minutes into the video because i am just going to go through each scenario that could end the game and type in that scenario so like next is the third row six seven and eight equals xxx and i'm doing an or statement and then a new line at the end of each of these it's just a lot cleaner than getting like run-on lines of code here so we've handled the three horizontal conditions let's go ahead and add now the three vertical ones so this is going to be column one which is going to be zero three and six and you can see with how many freaking times i would be typing in positions calling it pos saves actually a lot of characters over the course of this conditioning so then column two is going to be one four and seven and then equals okay xxx and then the third vertical the third column is going to be two five and eight okay and now there's only two more conditions right the diagonals and so the first one we're gonna say you start in the top left you go through the middle which is four and then down to the bottom right which is eight and then the other one would be let's say i have a space there the other one would be you start in the top right which is two you go through the middle which is four and you stop in the bottom left which is 6. okay so that was a lot of typing just to kind of handle this but it was really important because these are all the different ways that x could win so it's one big ass if statement to get into this but if that happens what we're going to do is we're going to set our game over variable equal to true and then we are going to put a label on the screen which i'll call win label and that's going to be equal to label and we're going to put it on root and then we want the text to read x wins okay and so uh we'll go ahead and draw it onto the screen in our grid right here as well just to cut down on total rungs of code we'll put it in the middle there okay but the good news is because we did all this right here we don't have to like think through all the conditions again for the o's right we can just come in and anywhere that we had xxx we can change to ooo and i'll just go ahead and copy this and i'll make it an l if um in theory whichever one of these happens first should take care of it but it's just good practice if you want two things to be mutually exclusive make it an l if instead of just a regular if okay so we'll go ahead and replace them all with o's and now let's go ahead and say x wins instead that's going to say o wins and then if neither of those are true then we will just say game over is false right which it probably was already false if we're running this function but that's okay because that's okay because now we're handling all three scenarios which is basically o wins x wins or no one wins and let's return game over because that's what we were checking here right okay so let's see that might do it let's go ahead and run it and see if we made any mistakes here or if we've got it alright let's play as x let's try to win here i'll just go here x wins okay very cool let's start it again let's see if we can make the computer win o wins already nice and you can't take any moves after that and you have to hit start to reset the game board so i would say that's working pretty good obviously we're not keeping track of like total score we haven't made the ai think or anything and probably most importantly this game board is ugly as sin so in the next video we're actually going to finally improve the aesthetic appearance of our app but you can see we've created like a working tic-tac-toe game that handles wind conditions and everything so hopefully you found that useful if you did i really appreciate a like on the video and a subscribe to the channel and as always thanks for watching and good luck with your code thanks bye