WEBVTT 00:00.570 --> 00:05.850 Next set of questions is regarding object oriented programming. 00:06.450 --> 00:13.170 So let's have a look at the questions and we will be solving these one by one. 00:14.220 --> 00:18.720 So the first question is create a world class with max speed. 00:19.080 --> 00:21.480 And my login starts after that. 00:23.340 --> 00:26.010 So let's pause the video. 00:26.340 --> 00:31.620 And you can create this class and you can enforce Luder to see the solution. 00:33.780 --> 00:35.890 Now, let's look at the solution for the scene. 00:35.910 --> 00:43.860 So to create A Class B, C, class and class name is set to be very carefully selected. 00:49.110 --> 00:51.540 Each class will have ultimate function. 00:51.930 --> 00:54.270 So we will define the function. 01:01.870 --> 01:11.710 And in that function takes skill and the attributes which you've suggesting, Max, speed and mileage, 01:17.110 --> 01:25.900 and it's like the function novins we have created these two instances, we need to initialize the scene. 01:26.410 --> 01:28.460 So we really do the scene by scene. 01:29.050 --> 01:37.360 So this is equal to max speed 01:50.920 --> 01:52.060 is equal to mileage. 01:55.830 --> 02:06.510 Now, once we have created this class, we can run this so we can see let's create the vehicle, so 02:06.510 --> 02:08.610 let's see one. 02:10.080 --> 02:24.180 And this will be something that speaks to one thing and my beach as well. 02:26.010 --> 02:29.910 So let's bring the actor will 02:32.760 --> 02:41.940 say one stop max speed ba, more than 02:47.490 --> 02:48.810 150 and 20. 02:49.230 --> 03:01.020 You can also look at the different attributes or you can simply say, let's say we can see hell and 03:01.020 --> 03:03.780 we can see wrinkles. 03:05.490 --> 03:16.620 And here you can see that it has these two attributes, max speed and mileage, which have been defined. 03:21.300 --> 03:25.230 Next is another question which we will be solving. 03:29.060 --> 03:34.220 So the next question is to create a good class without any variable in. 03:35.090 --> 03:38.140 So this has to be a completely blank class. 03:38.570 --> 03:44.330 So drydock was the question and try this and pose for the solution. 03:49.820 --> 03:58.760 So let's look at this solution for this so we can simply create a class with nothing in it by simply 03:58.760 --> 04:01.070 giving the class name 04:04.460 --> 04:10.220 and saying that this would create create an empty class with nothing and say this. 04:10.280 --> 04:21.650 If I run this and let's see as they help, they can you can see that it does not contain evil and make 04:21.650 --> 04:22.310 the plight of one. 04:26.420 --> 04:28.260 Let's look at the next question. 04:28.280 --> 04:35.690 So the next question is to create a giant class bus that will inherit all the variables and methods 04:35.690 --> 04:36.860 of the legal class. 04:37.370 --> 04:40.440 So this is a legal class which they have already provided. 04:40.940 --> 04:48.380 The wealthy class canceled campaigns of the weekly maximum speed mileage, and it has been initiated, 04:48.380 --> 04:49.700 initialized accordingly. 04:50.000 --> 04:58.580 So we want to create a giant class, which is bus object, and it will inherit all the variables. 05:00.560 --> 05:04.610 You can pause the video and later you can unfold for the solution. 05:15.820 --> 05:19.340 Let's solve this problem now to solve to solve this problem. 05:19.360 --> 05:29.140 We can simply create class, but which should inherit all the properties of the burning glassmaking. 05:29.140 --> 05:31.360 So we will pass Boston vehicle and save this. 05:32.740 --> 05:37.930 And instead of this, we will define 05:43.570 --> 05:45.520 initialised with says. 05:46.900 --> 05:48.250 I didn't say that. 05:48.250 --> 05:53.770 We need to give your name my speed mileage 05:58.450 --> 05:59.830 and these. 06:17.920 --> 06:25.540 So this has already been created, named as has been given, so we just need to create waker. 06:25.550 --> 06:28.420 So instead of doing this, we will simply say fast. 06:30.160 --> 06:34.890 And when we run this level, do we create more technical class for creating the object? 06:34.900 --> 06:37.330 We can simply say, oh, that's cool. 06:37.330 --> 06:37.780 That's 06:41.200 --> 06:43.570 an inside this thinking of the object. 06:43.570 --> 06:49.180 And the object will take all these parameters the way the other one thinks. 06:49.540 --> 06:51.760 So we can simply give the name bot. 06:52.420 --> 06:55.180 So they want the name to be fully Valvo. 06:55.180 --> 06:56.530 So we give the same. 06:59.320 --> 07:04.510 Then it needs to have the speed as quantity and mileage as well. 07:05.290 --> 07:12.100 So after that, we can bring the in this particular manner. 07:12.100 --> 07:16.000 We need the printing building so we can simply say print. 07:18.470 --> 07:20.730 And we can give the schools 07:23.560 --> 07:24.020 problem. 07:24.460 --> 07:34.810 Instead of school, we need to get the school bus dock the name. 07:37.000 --> 07:39.820 Then we need speed. 07:44.410 --> 07:49.300 Then we need school bus start, max speed. 07:49.390 --> 07:58.050 So you can see we are getting like the name schools, Volvo, speed, Aswani and Minor just with assemblies. 07:59.710 --> 08:01.870 Now, let's go to the next question. 08:04.450 --> 08:07.620 So here we want to play in. 08:08.860 --> 08:16.480 So we already have created the class where you can hear the glasspiegel again has all the attributes 08:16.480 --> 08:18.970 name must be milage wanted to present day. 08:19.510 --> 08:30.710 And inside this, we want to have a capacity argument of bus seeping capacity and a default value of 08:31.060 --> 08:32.230 needs to be given to it. 08:33.490 --> 08:39.700 Further, we want to use these present code for Lenegan plus. 08:40.210 --> 08:46.630 And we need to apply method overrating to get the required output. 08:46.930 --> 08:50.860 The output should be that the seating capacity of the bus is the passenger. 08:51.160 --> 08:59.170 So all we need to do is we need to use the Bible class to create the child class bus. 08:59.410 --> 09:04.150 And the Zeigler's bus should have a default capacity of 50. 09:05.350 --> 09:07.130 And it should use the same. 09:08.620 --> 09:16.290 So you can pause the video as I tried out and you can unfold for viewing this olution. 09:17.350 --> 09:21.040 We have the vehicle class already present. 09:22.780 --> 09:31.270 For that, we need to create the giant last bus so we can see class and we can see a bus and the way 09:31.270 --> 09:36.100 Colleville bus will in headed Wakool Solis's vehicle. 09:36.670 --> 09:40.170 And we will define the function again. 09:40.180 --> 09:44.900 Now, once we inherited Riegle, this function already is present. 09:45.460 --> 09:55.150 So you can simply take that or let's see bus and you can check this by taking help on the bus. 09:57.360 --> 10:01.000 See, these are already present. 10:01.360 --> 10:03.310 The method is already present. 10:03.970 --> 10:05.710 But we need to override it. 10:05.950 --> 10:06.290 Right. 10:06.310 --> 10:12.430 We need to apply method overrating and we need to change the seating capacity and to have the full value 10:12.430 --> 10:12.890 of the speech. 10:12.910 --> 10:17.890 So what we can do is we can simply create the function of seating capacity again. 10:21.610 --> 10:26.320 And we need to change it so that the capacity will have a default value of coffee. 10:26.320 --> 10:31.330 So we can basically do that by assigning it as the value of P and. 10:33.720 --> 10:36.450 You can simply return the value. 10:36.870 --> 10:43.710 Now, here, we need to return the value as in a different way. 10:43.980 --> 10:46.170 So let's get rid of this. 10:50.430 --> 10:52.410 So here we will see silver 10:56.250 --> 10:59.550 dot seating 11:02.160 --> 11:03.090 capacity. 11:07.020 --> 11:07.920 Capacity 11:13.320 --> 11:14.850 is equal to 50. 11:15.210 --> 11:23.610 So all we are doing here is we are giving our default value to our bid class here. 11:24.090 --> 11:26.010 So let's run this again. 11:27.960 --> 11:35.490 So here you can see that the method has seating capacity as a fee on the inherited matter. 11:35.970 --> 11:40.380 Has this in it as an inherited one. 11:41.820 --> 11:42.570 Let's go forward. 11:43.680 --> 11:46.280 Now we need to get the output here. 11:46.290 --> 11:48.480 So let's see how it is helping out. 11:48.480 --> 11:50.930 So let's create the bus. 11:51.240 --> 11:53.220 Simply we create the bus again. 11:55.920 --> 11:58.050 So we are creating the school bus again. 11:58.330 --> 12:00.090 Volvo 188 will. 12:00.780 --> 12:02.280 And let's simply spring 12:05.940 --> 12:12.120 school bus docked seating 12:15.420 --> 12:16.260 capacity 12:20.910 --> 12:21.920 and let's run this. 12:22.890 --> 12:27.780 So now here you can see that this heating capacity of the school, Volvo, is 250 passengers. 12:28.170 --> 12:35.280 So it has simply over been this capacity to the bedroom plus. 12:36.810 --> 12:39.570 So for depen class, it does bloodedness. 12:40.080 --> 12:42.480 Let's see what will happen if we do not. 12:44.700 --> 12:47.480 Let's just try and get a seat. 12:48.990 --> 12:52.800 It is missing one required positionally argument capacity. 12:53.370 --> 12:54.570 Let's do this. 12:56.400 --> 12:57.420 Let's do this. 13:00.930 --> 13:04.440 And you can see seating capacity of the school hallways for passengers. 13:05.880 --> 13:08.580 So you can do it any way you want. 13:09.180 --> 13:13.590 This is the standard way of overriding metal overrating. 13:15.210 --> 13:19.320 Now, let's go ahead and try to solve another problem. 13:23.210 --> 13:25.760 OK, so this is the problem. 13:29.180 --> 13:37.640 So here we need to define property that should have the same value for every last instance. 13:38.960 --> 13:42.380 Define a class attribute value over the default value. 13:42.380 --> 13:43.070 That is right. 13:43.490 --> 13:47.900 Every this should be like use the following code for this exercise. 13:47.930 --> 13:52.460 So we have created a molecule which will have me my speed mileage. 13:52.850 --> 13:55.520 And then there will be bus God. 13:55.760 --> 13:58.100 You can create these giant clusters. 13:58.400 --> 14:06.650 And we need to modify these methods such that the default color will be white for all of these. 14:08.330 --> 14:09.590 So you can try this out. 14:10.100 --> 14:15.170 And don't forget to try this first and then only look at the solution. 14:15.680 --> 14:16.430 Try this out. 14:16.430 --> 14:19.700 Voiced pause, this video and on pause for solution. 14:26.720 --> 14:31.370 Now let's have a look and the solution for this particular problem. 14:33.770 --> 14:39.050 We have already created class vehicle bus and got here. 14:40.050 --> 14:48.830 Now the variables which are created in in it, these are called the instance variables and instant variables. 14:48.830 --> 14:51.950 Value is specific to a particular instance of the class. 14:52.280 --> 14:54.890 So let's say I click, create an instance. 14:55.940 --> 14:57.050 Let's say fl1. 14:57.830 --> 15:00.240 Then I create another instance or defeat. 15:00.650 --> 15:05.030 So the preview for this will be constant. 15:05.300 --> 15:08.990 So whatever attribute instance variable I will be creating. 15:09.320 --> 15:15.710 It will be specific to that only for that particular object of the class instead. 15:16.910 --> 15:21.860 But for example, in the solution, all we object have named max speed mileage. 15:22.220 --> 15:25.610 So all of these will have different values for different objects. 15:26.360 --> 15:27.530 But there are different. 15:27.650 --> 15:30.110 There is another thing which is called class attribute. 15:30.440 --> 15:35.840 Now, class attribute is something which will have same value for all the class instance. 15:36.170 --> 15:43.820 So, for example, if we want to create a particular value color, which would be common for all the 15:44.090 --> 15:49.520 objects which are created out of this, then that is called an attribute. 15:49.940 --> 15:50.270 OK. 15:50.480 --> 15:52.970 So there will be a same value. 15:53.270 --> 15:56.840 That is it will have same value for every class instance. 15:56.840 --> 15:58.550 That is, it will be an actor to build. 15:59.000 --> 15:59.720 And if 16:02.540 --> 16:05.120 it does not have, then it reveal variable itself. 16:05.810 --> 16:09.710 So let's create a class attribute. 16:10.130 --> 16:14.510 So for creating the class attribute, let's copy this all again. 16:15.890 --> 16:18.410 So we will need to modify this particular one. 16:18.680 --> 16:19.910 So how do we modify it? 16:19.910 --> 16:27.200 We will make the class attribute and fulfilling the class attribute we declared inside the class itself 16:27.200 --> 16:28.210 before the init. 16:29.120 --> 16:32.780 So we can simply say Kalush 16:35.900 --> 16:43.730 is equal to right and everything else remains the same. 16:44.270 --> 16:54.230 So when I run this, what happens is I can create another object of it. 16:54.740 --> 16:58.630 So let's create object from here to a 17:03.890 --> 17:06.020 school bus with this detail. 17:08.480 --> 17:12.140 And let's create a car also. 17:21.850 --> 17:22.670 The chips. 17:35.940 --> 17:36.600 Like this. 17:37.230 --> 17:45.450 Now let's try to get different attributes out of it so we can simply get the attribute by saying 17:53.040 --> 17:56.520 spin school bus dot. 18:04.630 --> 18:05.200 Colors, 18:15.770 --> 18:18.720 schools, start me 18:22.600 --> 18:31.390 and do this for the goggles, the same time, you're also going to fly. 18:32.050 --> 18:32.800 That's from this. 18:33.220 --> 18:41.950 So you can see that the guy's name is already Q five and the color is shown as white and so on. 18:42.190 --> 18:45.040 So this is how you can get all of the attributes also. 18:45.040 --> 18:47.290 I mean, not favorable for you. 18:47.620 --> 18:51.850 You can modify this index to go get all the values. 18:52.490 --> 18:58.210 Just remember, if you want to have attributes which would be common to all the instances which would 18:58.210 --> 19:04.690 be shared by all the instances, then it should be defined like this. 19:08.260 --> 19:11.350 Let's go ahead and solve the next problem. 19:13.510 --> 19:15.850 So this is, again, an inheritance problem. 19:16.300 --> 19:26.200 So here we want to create a bus child class, and the default surcharge of any vehicle is seating capacity, 19:26.710 --> 19:29.950 which needs to be Endou multiplied by 100. 19:30.160 --> 19:35.140 So default surcharge for the vehicle is seating capacity in 200. 19:35.470 --> 19:42.310 If the vehicle is a bus, then we need to add an extra 10 percent on the full fare 19:47.020 --> 19:48.490 as a maintainance charge. 19:48.490 --> 19:55.270 So that order fare for bus instance, will be Fullam final amount is equal due to a bit of that in Lotame, 19:55.270 --> 19:55.990 times double will. 19:56.410 --> 20:02.440 So basically capacity in two hundred plus 10 percent of the total fare, which has been calculated. 20:03.520 --> 20:06.400 Now the bus seating capacity is Fofi. 20:06.580 --> 20:09.250 So the final set amount should be fifty five hundred. 20:09.520 --> 20:13.240 You need to override the third method of a legal class in bus. 20:13.870 --> 20:15.580 Use the following code for the seat. 20:16.090 --> 20:20.080 We need to access the bed and blast from inside the method of the class. 20:20.440 --> 20:22.480 So this is what we already have. 20:22.780 --> 20:26.980 So we have the winkel class, which has me milage capacity. 20:26.990 --> 20:31.840 Then we have set, which is calculated by standard capacity in 200. 20:32.170 --> 20:35.290 Then we have the bus vehicle for the bus vehicle. 20:35.590 --> 20:42.070 We need to calculate the Fed by multiplying the capacity in all the capacity has to be 50. 20:42.400 --> 20:47.040 So according to that, it should be solved accordingly. 20:47.050 --> 20:50.260 So you can solve it like this. 20:50.410 --> 20:52.570 This is having a value for fee. 20:52.570 --> 20:54.730 You can give a deferred wiliest for Feltl. 20:55.210 --> 20:58.660 So Trino try to solve this problem. 20:59.440 --> 21:03.220 And you can always pause and try. 21:03.220 --> 21:06.550 And then I'm forced to view the solution for that. 21:06.910 --> 21:08.560 But please give it a try. 21:09.580 --> 21:11.870 So let's solve this problem now. 21:12.790 --> 21:16.360 So Ford's solution of this problem, we can use this board itself. 21:18.040 --> 21:21.820 Now, here, we need to modify the function first. 21:22.270 --> 21:28.570 So in the bus, Wakool, we need to modify this Fed function. 21:28.900 --> 21:34.900 So here in sort of bus, we will define Fed and inserts it. 21:35.310 --> 21:45.400 Now, the amount which will be amount will be equal to Super Nafez. 21:52.210 --> 21:55.380 And on top of it, this is what is common to all. 21:56.800 --> 22:04.720 And on top of this, the amount is equal to among last 22:08.680 --> 22:14.170 amount to 10 percent. 22:14.680 --> 22:17.460 Ten percent is equal to zero point one. 22:17.470 --> 22:18.580 So you can meet that goal. 22:18.600 --> 22:20.080 So it is completely up to you. 22:20.440 --> 22:24.430 So as you say, zero point one here for simplicity. 22:25.060 --> 22:30.040 And we can just put it into the brackets. 22:32.950 --> 22:36.030 And begin the Dondi amount. 22:39.670 --> 22:46.210 So it gets to the base, Ferus 55 and so that's it. 22:46.810 --> 22:50.260 Now let's have a look at the next problem. 22:54.130 --> 22:59.400 Now here we have the domain which glass are given but object belongs to. 22:59.740 --> 23:02.470 So we simply need to check the type of an object. 23:02.920 --> 23:05.830 So we have this class vehicle here. 23:06.370 --> 23:11.310 It has the definition as this class bus and the various classes vehicle. 23:12.340 --> 23:16.110 So we have created an instance of bus. 23:18.280 --> 23:24.010 So you just need to find out the class of the object. 23:24.610 --> 23:27.460 So it is a simple one, Distrito. 23:30.340 --> 23:32.830 You can pause and unpause for the solution. 23:38.970 --> 23:44.190 So let's look at this olution, so for checking the glass, you can simply check the type. 23:45.120 --> 23:51.900 So for checking the baby, you can simply say stay on the instance name. 24:02.930 --> 24:09.830 So you can see that this is the instance of the object of the blasphemous. 24:12.260 --> 24:18.530 Similarly, if you would have checked for any instance which had been created using liCl, then for 24:18.550 --> 24:21.620 Dagley object, they would have been a plague. 24:22.910 --> 24:24.140 So this was a simple one. 24:24.770 --> 24:29.840 Let's go ahead and have a look at for the next questions. 24:33.320 --> 24:38.930 So here we need to determine if a school bus is also an instance of the recent floods. 24:39.470 --> 24:43.700 So we did check that school, which has an instance of bus. 24:44.030 --> 24:47.440 So we need to verify if it is an instance of the working class soldiers. 24:47.440 --> 24:50.030 So everything is just the same. 24:50.540 --> 24:58.670 Let's have a look at the data and you can see if you could squeeze us. 25:02.270 --> 25:09.680 It gives me a bus now because bus is the giant class of people who logically school bus should also 25:09.680 --> 25:12.200 have be an instant a link to the bus. 25:12.200 --> 25:13.430 But we need to verify that. 25:13.850 --> 25:20.870 So just all that you can try different functions with, of anything and see if you are able to find 25:20.870 --> 25:21.350 something. 25:21.740 --> 25:26.210 And you can try help to find out if you have any function like that. 25:28.520 --> 25:31.130 You can pause on bus for the solution. 25:36.430 --> 25:38.860 So now let's quickly look at the solution. 25:41.860 --> 25:49.150 Now, instead of baby, let's look at if it starts 25:52.030 --> 25:55.030 to reverse for my baby 25:58.630 --> 26:01.290 and one this so you can see it gives back to. 26:02.500 --> 26:10.810 So this is a function that you can basically use on an object and a glass to verify if an object is 26:11.170 --> 26:14.320 an instance of a particular glass of milk. 26:19.380 --> 26:23.550 So that's it for this type of object oriented programming questions.