WEBVTT 0 00:00.330 --> 00:01.650 Now in the last lesson, 1 00:01.680 --> 00:05.610 we created our question class. In this lesson, 2 00:05.640 --> 00:10.470 we're going to be creating a question bank of question objects. 3 00:11.070 --> 00:15.930 Notice how we can create a question object by using the name of the class and 4 00:15.930 --> 00:20.250 then giving it some inputs for the question and the answer. Now, 5 00:20.250 --> 00:25.080 if we create a whole bunch of those and then put them into a list like this, 6 00:25.140 --> 00:29.580 then we can create a question bank of questions to use in our quiz. 7 00:30.720 --> 00:33.570 If you take a look inside the data.py file, 8 00:33.900 --> 00:38.900 you'll see that I've already included a whole bunch of questions inside here, 9 00:39.270 --> 00:42.300 and you can see it's got some text and it's got some answer. 10 00:42.780 --> 00:47.780 So the exact structure of this file is that it's got a whole bunch of 11 00:48.360 --> 00:51.030 dictionaries, 12 in total, 12 00:51.330 --> 00:55.110 and all of these dictionaries are saved inside a list 13 00:55.440 --> 01:00.270 and that list is called question_data. Now, when you first come onto this file 14 01:00.300 --> 01:04.020 you'll see some warnings, these little yellow squiggly lines. 15 01:04.500 --> 01:08.190 And the reason is because it would expect for proper formatting, 16 01:08.580 --> 01:13.140 each of these dictionaries should be indented inside the list. Now, 17 01:13.200 --> 01:16.620 in terms of actual functionality, this won't change anything. 18 01:16.650 --> 01:21.650 The indentation of the items in a list are not as important as the indentation 19 01:21.810 --> 01:23.820 in say a method or a for loop. 20 01:24.360 --> 01:27.210 But it's still better to get rid of all of these warnings. 21 01:27.630 --> 01:32.250 So what we're going to do is we're going to select everything inside this file, 22 01:32.310 --> 01:35.520 we're going to go to code and then auto-indent lines. 23 01:36.090 --> 01:39.060 And this you'll notice has now auto-indented 24 01:39.330 --> 01:42.120 all of the dictionaries inside the list. 25 01:42.720 --> 01:47.190 Now you'll still notice some red squiggly lines. So in this case, 26 01:47.190 --> 01:51.690 the reason is because the line is too long, it's greater than 120 characters. 27 01:51.960 --> 01:55.260 You can see that's where the cutoff is. So in PyCharm 28 01:55.260 --> 01:57.390 it's really easy to separate lines. 29 01:57.420 --> 02:01.020 If you just identify a good spot in that line, hit enter, 30 02:01.050 --> 02:05.700 and it will automatically add some quotation marks around it so that it still 31 02:05.700 --> 02:09.660 behaves the same way as before, but now it's on separate lines. 32 02:10.090 --> 02:12.450 And I'm going to do the same to line 8 as well. 33 02:12.840 --> 02:16.440 Now the final warning expect a new line at the end of the file, 34 02:16.650 --> 02:17.790 so it let's give it that. 35 02:18.150 --> 02:22.710 And the last thing that you'll notice here is that there's a squiggly line here 36 02:22.740 --> 02:26.880 under Backrub because that is a unknown word in the dictionary. 37 02:27.240 --> 02:31.050 So if you want to, you can actually save words into the dictionary 38 02:31.320 --> 02:33.420 to you get rid of all of these squiggly lines. 39 02:33.780 --> 02:35.940 This is actually a name of a company, 40 02:35.940 --> 02:38.280 so it's probably not going to be in the dictionary. 41 02:38.580 --> 02:41.250 But if you go ahead and put your cursor on it like this, 42 02:41.490 --> 02:45.720 you'll see a little light-bulb light up and you can go ahead and select save 43 02:45.720 --> 02:47.490 'Backrub' to project-level dictionary, 44 02:47.910 --> 02:50.850 and that will get rid of all of your warnings and errors 45 02:51.120 --> 02:54.000 and you'll see a nice green check mark in the right corner. 46 02:55.110 --> 02:57.990 Now that we've done all of this formatting with the data, 47 02:58.020 --> 03:03.020 let's really examine it. What we have here is a list of dictionaries. 48 03:04.390 --> 03:09.390 Each of the dictionaries have the same key for the question text and the same 49 03:09.640 --> 03:11.320 key for the question answer. 50 03:11.890 --> 03:16.890 So what we need to do is we need to be able to bring this question data into the 51 03:17.560 --> 03:21.850 main.py file. But instead of having a list of dictionaries, 52 03:22.240 --> 03:25.120 we want a list of question objects. 53 03:25.690 --> 03:30.690 We know already that we can create a new question object by simply constructing 54 03:31.690 --> 03:35.740 one from the question and then giving it the required inputs. 55 03:36.160 --> 03:39.700 But in order to do this inside the main.py file, 56 03:40.420 --> 03:45.420 we, of course, have to import the question model and we'll also need to import the 57 03:45.790 --> 03:49.480 data.py. So from the question model 58 03:49.480 --> 03:54.310 I'm going to import the question class, and from the data file 59 03:54.340 --> 03:56.830 I'm going to import the question data. 60 03:57.550 --> 04:02.260 Now that you've got both the question data and the question class, 61 04:02.950 --> 04:06.010 your goal is to create the question bank. 62 04:06.670 --> 04:08.020 And once you're done, 63 04:08.200 --> 04:12.100 it should contain a list of question objects 64 04:12.520 --> 04:15.610 each being initialized with a question and an answer, 65 04:16.390 --> 04:21.390 and the data is going to come from these dictionaries from the question data. 66 04:22.450 --> 04:26.440 So you'll need to think about how you can loop through that question data in 67 04:26.440 --> 04:28.930 order to create this list of question objects. 68 04:29.440 --> 04:31.510 Pause the video and give that a go now. 69 04:34.930 --> 04:37.690 All right. So we know that we need to create this question bank 70 04:37.750 --> 04:40.600 which is going to be a list of question objects. 71 04:41.110 --> 04:43.930 So I'm going to start out just by creating an empty list 72 04:44.380 --> 04:49.380 and then I'm going to loop through each of the questions inside the question 73 04:49.720 --> 04:53.380 data. And for each of these questions, 74 04:53.380 --> 04:58.180 I'm going to create a variable, which we'll call a question_text 75 04:58.870 --> 05:03.870 and the question_text is going to come from those question dictionaries from 76 05:04.660 --> 05:06.730 here. And if we imagine 77 05:06.730 --> 05:10.330 we have one of these dictionaries and we want to get hold of the question_text, 78 05:10.660 --> 05:12.910 then we'll need to tap into the text key. 79 05:13.390 --> 05:18.130 So I'm going to put text inside here and I'm going to do the same thing for the 80 05:18.130 --> 05:18.963 answer. 81 05:19.570 --> 05:24.570 So this is going to be using the answer key that we see right here. 82 05:25.600 --> 05:29.500 So now if we're looping through the first one, we should have 'A slug's 83 05:29.500 --> 05:34.500 blood is green.' and 'True' for these two variables. 84 05:35.080 --> 05:38.230 So now I'm ready to create my new question, 85 05:39.040 --> 05:41.980 which is going to be created from the question class. 86 05:42.430 --> 05:46.660 And you can see that in the constructor, it's expecting two parameters; 87 05:46.930 --> 05:51.930 one is the q_text and another is the q_answer. 88 05:53.650 --> 05:58.340 We can set the q_text to this local variable called question_text, 89 05:58.760 --> 06:02.750 and we can set the answer to the question_answer. And of course, 90 06:02.750 --> 06:04.100 for simplicity sake, 91 06:04.130 --> 06:09.130 we can also get rid of the named parameters and have them just as the parameters 92 06:09.400 --> 06:10.233 like this. 93 06:10.630 --> 06:15.630 So now that we've created this new question object and saved it in the variable 94 06:16.000 --> 06:19.690 new_question, we're ready to add it into our question bank. 95 06:19.870 --> 06:22.060 So we can say a question_bank.append, 96 06:22.450 --> 06:26.560 and we'll append each of these new questions that we create in the for loop. 97 06:27.190 --> 06:30.640 So now if I go ahead and print this question bank, 98 06:31.120 --> 06:35.350 you'll see that when I hit run and select my main file, 99 06:35.830 --> 06:40.830 then it prints out a list denoted by the square brackets and inside the list 100 06:41.830 --> 06:46.090 you've got a whole bunch of question objects. And if you count, 101 06:46.120 --> 06:47.920 there's actually 12 in total, 102 06:48.190 --> 06:52.060 one for each of the dictionaries inside our question_data. 103 06:52.750 --> 06:55.600 So very often when you're getting data from the 104 06:55.810 --> 06:59.410 internet or from somewhere else, it'll likely be in a format 105 06:59.410 --> 07:04.210 that's very similar to this. What we're doing is we're converting each of these 106 07:04.210 --> 07:08.500 pieces of data which has a string key, 107 07:08.680 --> 07:10.630 which means it's very easy to make typos 108 07:10.630 --> 07:12.880 if we're using this in our code everywhere, 109 07:13.270 --> 07:15.760 and we're converting it into a object 110 07:16.120 --> 07:21.120 which now has all of that data in a very easy and foolproof way of accessing the 111 07:22.660 --> 07:26.380 text and the answer. And you'll notice here, 112 07:26.410 --> 07:29.050 if I actually write the wrong thing, 113 07:29.320 --> 07:31.810 then it's actually going to highlight to me 114 07:32.080 --> 07:35.980 this is not something that you can use. And if I start typing, 115 07:36.010 --> 07:38.920 I've also got the help of the auto-insert. 116 07:40.480 --> 07:45.480 Now that we've created our question bank of question objects, the next step is to 117 07:46.240 --> 07:48.160 actually get our quiz up and running.