WEBVTT 0 00:00.200 --> 00:07.190 Now that we've seen how to create our own custom classes, we're finally ready to build the Quiz Game. 1 00:07.400 --> 00:10.790 Now this game is going to be a simple, True / False game, 2 00:10.790 --> 00:15.170 so a question will be asked to the user and they'll select True or False, 3 00:15.170 --> 00:19.250 and then we'll tell them if they got it right or wrong and give them a score. 4 00:19.730 --> 00:25.850 Now to begin, the first step you'll need to do is to download the zip file with all the starting code 5 00:25.850 --> 00:27.830 from our Course Resource website. 6 00:27.830 --> 00:33.830 And once you've extracted the actual folder, quiz-game-start from the .zip file, 7 00:33.830 --> 00:37.490 then we're ready to go ahead and open it using PyCharm. 8 00:38.120 --> 00:40.490 In PyCharm we're going to click Open, 9 00:40.490 --> 00:46.760 and then we're going to navigate to the place where we have our quiz-game-start, which in my case is 10 00:46.760 --> 00:48.140 in the Downloads folder. 11 00:48.680 --> 00:54.650 PyCharm should automatically configure the latest version of Python you've got installed as the interpreter. 12 00:54.650 --> 00:57.740 So you can go ahead and close these pop-ups. 13 00:57.740 --> 01:06.020 And if we open up our quiz-game-start folder, you can see we have four files, data, main, question_model, 14 01:06.020 --> 01:07.100 and quiz_brain. 15 01:07.100 --> 01:12.650 And over the course of the next few lessons, we're going to be writing the code in all of these files 16 01:12.650 --> 01:16.160 so that we end up creating our Final Quiz Project. 17 01:16.820 --> 01:23.350 The first task that we have is to create a model for a question in our quiz. 18 01:23.500 --> 01:28.990 If we had a Question object, well, what kind of attributes should it have? 19 01:29.020 --> 01:36.340 It might have a text attribute for the question text, and it might also hold an answer attribute, 20 01:36.340 --> 01:39.730 which is going to be the correct answer to that question. 21 01:40.240 --> 01:48.400 Now these two attributes should be initialized with a value when a new_q object is created from 22 01:48.400 --> 01:49.300 this class. 23 01:49.360 --> 01:55.360 So for example, if our first question was 2 + 3 = 5, which we know the correct answer 24 01:55.360 --> 01:56.380 should be True, 25 01:56.410 --> 02:02.320 well, then we might write the code like this to actually initialize a new_q object. 26 02:02.320 --> 02:10.480 And when this initialization goes through, the constructor code inside the Question class will take these 27 02:10.480 --> 02:17.170 two pieces of data and then add them to the corresponding attributes, the text and the answer. 28 02:17.170 --> 02:23.980 And so our new_q object will have both of these attributes initialized with a value 29 02:23.980 --> 02:34.240 when a new_q object is being created. Inside your project, go over to the question_model.py file, 30 02:34.240 --> 02:39.580 and go ahead and create a new class called Question, 31 02:39.580 --> 02:48.250 and that Question class should have an __init()__ method which will initialize two attributes the text and 32 02:48.250 --> 02:51.640 the answer, just as you've seen in the previous slides. 33 02:52.000 --> 02:56.680 Pause the video and see if you can complete this challenge by creating this class. 34 03:01.810 --> 03:02.350 All right. 35 03:02.350 --> 03:06.300 So we know that to create a class we first have to use the class keyword. 36 03:06.300 --> 03:12.120 And then in our case the name of the class is going to be called Question because we're modeling what 37 03:12.120 --> 03:14.820 a question would be like in our game. 38 03:15.120 --> 03:21.870 We know that each of these questions have two attributes a self.text and a self.answer, 39 03:21.870 --> 03:29.970 and those two attributes are going to be initialized when we create a new_q object, 40 03:29.970 --> 03:32.610 so we need the __init()__ function in here. 41 03:32.610 --> 03:35.130 And we're pretty much going to use the autofill, 42 03:35.130 --> 03:40.860 so once you write 'def', and then you write 'init', you can see it in the dropdown list, 43 03:40.860 --> 03:44.970 and then just hit Enter, and the code will be inserted automatically. 44 03:44.970 --> 03:50.850 This way you don't have to remember the exact order of the parentheses, or where to put the colon, et cetera. 45 03:50.850 --> 03:51.600 et cetera. 46 03:51.630 --> 03:56.280 Now inside the __init()__ function, we're going to set up two attributes 47 03:56.280 --> 04:01.350 s we said, one is going to be called text and one is going to be called answer. 48 04:01.350 --> 04:08.550 And if we want to create an attribute we have to use this syntax self. and then the name of the attribute, 49 04:08.550 --> 04:15.690 because eventually when we create a new object from this class, say a new_q object, then we're 50 04:15.690 --> 04:22.290 going to be passing in these two items a piece of text, which is going to be the question, and then 51 04:22.290 --> 04:24.930 either True or False as the answer. 52 04:24.930 --> 04:32.220 And then later on, if we wanted to access the text, then we would say new_q.text. 53 04:32.250 --> 04:38.220 Now of course, at the moment these are all yellowed out because it seems to have no effect. 54 04:38.220 --> 04:43.110 There's no way of receiving a value for each of these attributes. 55 04:43.110 --> 04:47.640 And to do that we have to add some inputs inside the init function. 56 04:47.640 --> 04:51.240 So let's just call it q_text and q_answer. 57 04:51.240 --> 04:57.990 You can of course call these parameters anything you want, but the important part is you set the self.text 58 04:57.990 --> 05:04.110 to that first value, and the self.answer to the second value. 59 05:04.110 --> 05:12.500 So now when we actually go ahead and print this new_q.text object, like we have here, then 60 05:12.500 --> 05:16.310 it will go ahead and actually fetch this value into the output. 61 05:17.450 --> 05:25.490 If you go to Run and then Run and then select question_model, you can see that is what gets printed 62 05:25.490 --> 05:27.020 in the console. 63 05:28.280 --> 05:29.840 Let's delete those two lines. 64 05:29.840 --> 05:37.730 And now we have completed our first task which is creating our Question class from scratch.