WEBVTT 0 00:00.120 --> 00:03.360 So I'm sure you've had a few gos with your quiz now 1 00:03.360 --> 00:06.930 and you've answered all the questions and you know all the correct answers. 2 00:07.440 --> 00:11.670 It's a little bit dry if we only have one question bank, right? 3 00:12.210 --> 00:15.660 Wouldn't it be nice to be able to switch out the question data with some new 4 00:15.660 --> 00:19.530 questions? Now you could certainly write your own questions, 5 00:19.560 --> 00:24.000 just change each of the texts and the answers to whatever question you want to 6 00:24.000 --> 00:28.740 add. An alternative though, is to use the Open Trivia database, 7 00:28.920 --> 00:33.480 which is a free-to-use user contributed trivia question database 8 00:33.900 --> 00:38.900 and it has over 3000 verified questions to pick from. In the course resources 9 00:39.300 --> 00:44.190 I've got a link to the open TDB, the open trivia database, 10 00:44.610 --> 00:49.610 and we can go ahead and take a look at their API to see how we can generate some 11 00:49.710 --> 00:54.120 questions. For example, if I wanted 10 questions on, 12 00:54.480 --> 00:59.430 let's say computers and I want the difficulty to be easy 13 00:59.880 --> 01:02.850 and I want to select the type to be true or false 14 01:03.270 --> 01:06.840 And then I'm going to go and click generate API URL. 15 01:07.420 --> 01:08.940 Now that I've got my URL, 16 01:08.940 --> 01:12.600 I can open up a new tab and go to that location. 17 01:13.320 --> 01:18.320 Now, we'll get some data generated in a JSON format 18 01:18.990 --> 01:21.750 which is a JavaScript object notation 19 01:22.170 --> 01:26.700 but it actually looks pretty much the same as a Python dictionary. 20 01:27.210 --> 01:32.210 So let's go ahead and copy everything that's here and then go into our data.py 21 01:33.570 --> 01:38.570 and I'm going to replace the entire question data with what I got just now. 22 01:39.330 --> 01:42.870 Now once you paste it in, it's going to be very hard to read. 23 01:42.930 --> 01:47.930 So we'll need to go to code and then reformat code in order to get it to look a 24 01:48.870 --> 01:50.160 little bit more normal. 25 01:50.610 --> 01:55.610 So you can see that we've got this dictionary and it has two key-value pairs. 26 01:57.480 --> 02:02.480 One is a response code and another is a list which is under the key results. 27 02:04.350 --> 02:06.060 If I go and reformat this again, 28 02:06.090 --> 02:10.950 you can see that results is comprised of 10 dictionaries. 29 02:11.490 --> 02:11.700 Now, 30 02:11.700 --> 02:16.700 each of these dictionaries contain a whole bunch of key-value pairs and inside 31 02:17.430 --> 02:20.760 each of these key-value pairs it has a bunch of things 32 02:20.760 --> 02:24.960 including the category, that type, the difficulty, 33 02:24.960 --> 02:29.370 the question, the correct answer, and the incorrect answers. 34 02:29.850 --> 02:34.850 So what we can see here is we have a dictionary and then we have these two key 35 02:35.820 --> 02:36.653 value pairs. 36 02:37.110 --> 02:42.110 So you can simply just get rid of the enclosing dictionary and leave it so that 37 02:43.080 --> 02:47.940 you have this as a list of dictionaries. Now, 38 02:47.970 --> 02:52.970 if we go and reformat our code so that we can see each of these dictionary 39 02:53.310 --> 02:54.143 objects, 40 02:54.390 --> 02:59.070 you can see there's a total of five key value pairs and they each have the keys 41 02:59.080 --> 03:03.970 category, type, question, which is the question text and the correct answer 42 03:04.000 --> 03:06.550 which is a string that's true or false. 43 03:07.120 --> 03:10.360 These are the two bits of information that we're interested in. 44 03:10.840 --> 03:15.840 So can you figure out how you can modify the main.py in order to get our 45 03:16.030 --> 03:20.320 quiz to start working again with this new data? 46 03:20.830 --> 03:23.110 Pause the video and complete this challenge. 47 03:26.400 --> 03:30.810 All right. So we've got our question data from the data file, 48 03:31.320 --> 03:35.010 but now we have to change the names of these keys. 49 03:35.460 --> 03:37.890 Whereas before it was called text and answer, 50 03:38.310 --> 03:41.340 now it's called question and correct answer. 51 03:41.520 --> 03:46.520 So the question_text is under the key question and correct answer is under 52 03:46.830 --> 03:48.330 the key correct _answer. 53 03:48.840 --> 03:53.250 So just by changing those two things and pasting all of that data in 54 03:53.640 --> 03:58.640 we can already get started with this brand new quiz. And you can play with it and 55 04:00.780 --> 04:04.620 mess around with different data from the open trivia database, 56 04:04.860 --> 04:07.380 change the category, change the difficulty, 57 04:07.710 --> 04:10.770 and you have endless number of questions to play with. 58 04:11.460 --> 04:16.260 And this really brings about some of the advantages of Object Oriented 59 04:16.260 --> 04:21.260 Programming. Notice how only our main.py file actually has knowledge of how each 60 04:23.550 --> 04:28.550 of these classes work and behave. Our QuizBrain actually didn't need to be 61 04:30.000 --> 04:31.470 touched at all 62 04:31.500 --> 04:36.150 when we changed our data over. This is modularity at its best. 63 04:36.450 --> 04:41.450 We're able to completely switch up the question data to a different language, 64 04:41.670 --> 04:46.200 to a different topic, to a different format, and the quiz brain doesn't care. 65 04:46.680 --> 04:51.680 All it has to concern itself with is how to track which question we're on, 66 04:52.080 --> 04:55.230 how to get the next question, how to check the answer. 67 04:55.650 --> 04:59.940 And as long as it's able to do that and perform the functionality of a quiz, 68 05:00.330 --> 05:04.440 it's unconcerned by where the data comes from, how it's formatted, 69 05:04.770 --> 05:08.430 and it will continue to work. So, as you can imagine, 70 05:08.460 --> 05:10.770 if your colleague was working on quiz brain, 71 05:11.190 --> 05:15.450 they don't actually need to know how the data looks or how it's structured. 72 05:15.840 --> 05:19.170 And you, on the other hand, could be working on the data, 73 05:19.200 --> 05:23.070 getting hold of each of these pieces of data or writing the quiz. 74 05:23.550 --> 05:26.910 And you can already see how we've got a piece of program 75 05:27.210 --> 05:32.210 that's able to be far more complex than what we used to be able to create with 76 05:32.580 --> 05:34.050 simple procedural code.