1 00:00:00,390 --> 00:00:07,110 Hi, dear friends who are in this lesson, we will learn the overriding and overloading methods in OLP. 2 00:00:07,680 --> 00:00:09,090 So let's give it a go. 3 00:00:11,040 --> 00:00:14,640 And this is what we've learned so far about object oriented programming. 4 00:00:15,140 --> 00:00:21,570 And I will share with you what we have learned in this table in every lesson until the end of our topic. 5 00:00:22,680 --> 00:00:23,970 So have a look at that end. 6 00:00:24,210 --> 00:00:25,320 Let's continue our lesson. 7 00:00:27,840 --> 00:00:34,770 So in Python, if we decide to redefine the methods that we inherit in our class with the same name, 8 00:00:35,370 --> 00:00:38,430 then the method we created will work. 9 00:00:38,640 --> 00:00:39,030 Right? 10 00:00:39,270 --> 00:00:41,820 Not the inherited method makes sense. 11 00:00:42,450 --> 00:00:47,040 So this is called the override method in OLP. 12 00:00:47,880 --> 00:00:51,330 So we can always override the parent class methods. 13 00:00:52,530 --> 00:00:57,690 Also, we can define methods and function specific to our subclasses at any time. 14 00:00:58,530 --> 00:01:04,530 For example, instead of using the init method of the teacher class, we can override the init method 15 00:01:04,860 --> 00:01:06,480 in head master class. 16 00:01:07,410 --> 00:01:07,740 OK. 17 00:01:07,890 --> 00:01:11,760 So in this way, we can add extra attributes to the head master class. 18 00:01:13,110 --> 00:01:15,360 So let's do it and you'll see what I mean. 19 00:01:16,610 --> 00:01:17,200 Class. 20 00:01:17,630 --> 00:01:18,470 Headmaster. 21 00:01:19,520 --> 00:01:20,060 Teacher. 22 00:01:22,870 --> 00:01:23,290 In it. 23 00:01:25,070 --> 00:01:25,540 Self. 24 00:01:25,640 --> 00:01:28,340 Name, surname, profession. 25 00:01:29,260 --> 00:01:29,890 Classes. 26 00:01:31,430 --> 00:01:33,380 Gender, birth date. 27 00:01:34,970 --> 00:01:40,040 So now we define a new attribute named ADD event to the head master class. 28 00:01:40,580 --> 00:01:48,260 So this attribute specifies whether it is authorized to add activity and it'll get true or false. 29 00:01:48,980 --> 00:01:50,960 Self-taught name equals name. 30 00:01:51,740 --> 00:01:54,500 Self-taught surname equals surname. 31 00:02:04,910 --> 00:02:07,100 Self-doubt and event. 32 00:02:09,780 --> 00:02:11,040 Equals at event. 33 00:02:13,050 --> 00:02:14,520 Deaf change class. 34 00:02:16,600 --> 00:02:18,340 Self new class. 35 00:02:19,810 --> 00:02:20,230 Print. 36 00:02:22,670 --> 00:02:23,930 Changing class. 37 00:02:26,620 --> 00:02:30,160 Self taught classes equals new class. 38 00:02:31,120 --> 00:02:35,860 Now in this code runs the head master class init function will override. 39 00:02:37,360 --> 00:02:41,770 So let's create an object named headmaster three headmaster three. 40 00:02:42,400 --> 00:02:44,320 Headmaster William. 41 00:02:45,390 --> 00:02:45,900 Dough. 42 00:02:47,250 --> 00:02:48,030 Headmaster. 43 00:02:49,150 --> 00:02:49,690 None. 44 00:02:50,410 --> 00:02:55,630 Male zero nine zero nine one nine seven zero. 45 00:02:55,960 --> 00:02:56,390 True. 46 00:02:58,400 --> 00:03:00,400 Let's override the show info method. 47 00:03:01,600 --> 00:03:04,660 So first, we'll look at the content of the teacher class. 48 00:03:06,430 --> 00:03:08,420 Now let's override the head master class. 49 00:03:08,470 --> 00:03:09,400 Show info. 50 00:03:10,720 --> 00:03:12,880 Def show info. 51 00:03:14,190 --> 00:03:14,790 Self. 52 00:03:16,440 --> 00:03:19,500 Print headmaster's information. 53 00:03:32,670 --> 00:03:35,730 This is the attribute we just added at event. 54 00:03:38,240 --> 00:03:39,620 Self-doubt at event. 55 00:03:43,870 --> 00:03:46,180 And at this point, we override it. 56 00:03:50,240 --> 00:03:52,730 Now let's create again the last object. 57 00:03:53,890 --> 00:03:57,700 And check the info, headmaster three Dot. 58 00:03:59,970 --> 00:04:00,810 Show info. 59 00:04:02,860 --> 00:04:06,310 And that's if we successfully completed the overwriting process. 60 00:04:07,360 --> 00:04:08,440 How cool is that? 61 00:04:09,940 --> 00:04:12,250 So now let's talk about overloading. 62 00:04:13,330 --> 00:04:21,430 So these methods in OPIS are the methods that are not specifically called by us, but they do belong 63 00:04:21,430 --> 00:04:22,810 to every class. 64 00:04:23,320 --> 00:04:25,840 So most of them are defined by python by default. 65 00:04:25,870 --> 00:04:31,510 Even if we don't define them, however, we do need to define some of these methods specifically. 66 00:04:32,020 --> 00:04:36,000 And the init method, we've seen that before. 67 00:04:36,010 --> 00:04:41,680 Remember, that's an example of these methods that we have to define ourselves. 68 00:04:42,310 --> 00:04:46,030 So what we'll do here is we'll try to learn how to define these methods. 69 00:04:46,450 --> 00:04:50,140 So first will define a new class named car. 70 00:04:50,410 --> 00:04:54,340 And don't let's give an attribute class car. 71 00:05:03,710 --> 00:05:06,200 So now is create an object named car one. 72 00:05:07,290 --> 00:05:08,520 Equals car. 73 00:05:11,270 --> 00:05:17,750 Now, again, examine the overloading methods one by one with the help of our car class. 74 00:05:19,130 --> 00:05:26,960 For example, if we define the init function by ourselves and our own init function, we'll work class 75 00:05:26,960 --> 00:05:27,560 car. 76 00:05:31,140 --> 00:05:32,100 Death in it. 77 00:05:34,210 --> 00:05:38,530 Self brand model, fuel color. 78 00:05:39,600 --> 00:05:40,140 Yea. 79 00:05:42,060 --> 00:05:42,900 Transmission. 80 00:05:47,030 --> 00:05:49,910 Print creating car object. 81 00:05:53,470 --> 00:06:03,070 Self-taught brand equals brand, self-taught model equals model, self-taught fuel equals fuel, self-taught 82 00:06:03,070 --> 00:06:08,230 color equals color, self-taught year equals year. 83 00:06:10,090 --> 00:06:13,540 Self-taught transmission equals transmission. 84 00:06:16,040 --> 00:06:18,950 Now we can create a car object with attributes. 85 00:06:19,790 --> 00:06:23,530 Car two equals car. 86 00:06:24,080 --> 00:06:25,430 Alfa Romeo. 87 00:06:26,240 --> 00:06:26,930 Julia. 88 00:06:30,120 --> 00:06:30,720 Petrol. 89 00:06:31,760 --> 00:06:32,330 Red. 90 00:06:33,930 --> 00:06:35,370 Twenty seventeen. 91 00:06:36,800 --> 00:06:37,550 Manual. 92 00:06:39,260 --> 00:06:43,640 And normally when you use a print function print. 93 00:06:45,060 --> 00:06:46,050 Car to. 94 00:06:47,750 --> 00:06:58,010 Python returns to us this, however, if we define the SDR or string method ourselves, we will now 95 00:06:58,010 --> 00:07:01,580 be able to write the contents of the car more clearly on the screen. 96 00:07:02,210 --> 00:07:04,670 So come on, let me show you Def. 97 00:07:05,990 --> 00:07:06,230 As. 98 00:07:08,950 --> 00:07:09,580 Self. 99 00:07:12,600 --> 00:07:15,690 Now I'm going to use one of the editorial methods in Python. 100 00:07:15,780 --> 00:07:18,250 If you want, you can research that on the Internet. 101 00:07:18,270 --> 00:07:22,800 It's more than not worth it to go into it here, but just watch what I do. 102 00:07:24,070 --> 00:07:26,110 Return model. 103 00:07:27,400 --> 00:07:28,240 And brand. 104 00:07:33,690 --> 00:07:34,560 And fuel. 105 00:07:38,720 --> 00:07:39,710 And color. 106 00:07:44,630 --> 00:07:45,500 And year. 107 00:07:52,460 --> 00:07:53,690 And transmission. 108 00:07:59,420 --> 00:08:00,380 That format. 109 00:08:06,000 --> 00:08:07,260 Self-taught brand. 110 00:08:08,950 --> 00:08:09,730 Doubt fuel. 111 00:08:11,590 --> 00:08:12,700 Self-taught color. 112 00:08:17,690 --> 00:08:18,440 Self-taught. 113 00:08:18,470 --> 00:08:19,100 Yea. 114 00:08:20,560 --> 00:08:22,090 Self-taught transmission. 115 00:08:28,190 --> 00:08:34,070 Now we'll try to create our object again and printed print card, too. 116 00:08:35,360 --> 00:08:36,350 And there you go. 117 00:08:36,350 --> 00:08:37,250 It's a working well. 118 00:08:40,520 --> 00:08:46,550 Now, the Dell method is the method that is executed when we delete an object in Python with a key word 119 00:08:46,670 --> 00:08:47,270 Dell. 120 00:08:48,290 --> 00:08:53,300 Also, we can add extra features by defining this method ourselves. 121 00:08:54,440 --> 00:08:55,760 So let's go ahead and do it. 122 00:08:56,870 --> 00:08:57,770 So now let's define it. 123 00:08:59,040 --> 00:08:59,610 Self. 124 00:09:02,060 --> 00:09:02,540 Print. 125 00:09:05,270 --> 00:09:07,460 The leading car object. 126 00:09:15,620 --> 00:09:19,730 And let's define another object named Car three. 127 00:09:23,470 --> 00:09:29,050 Bentley, Brooklands, Petrel, Black, 1997 Automattic. 128 00:09:41,050 --> 00:09:43,180 And now let's check the info. 129 00:09:52,010 --> 00:09:53,630 So now let's delete the object. 130 00:09:58,740 --> 00:10:02,400 We deleted our object, cool, so let's control it. 131 00:10:03,510 --> 00:10:06,090 It's actually, you know, we can see if it's deleted or not. 132 00:10:06,900 --> 00:10:08,430 So print cr3. 133 00:10:14,360 --> 00:10:14,970 And that's it. 134 00:10:14,990 --> 00:10:16,280 We can tell our methods working. 135 00:10:18,050 --> 00:10:18,500 Cool. 136 00:10:18,530 --> 00:10:23,840 So in this lesson, we have learned the concept of override and overload in Python. 137 00:10:24,260 --> 00:10:29,660 So with these concepts, the inheritance in object oriented programming is complete. 138 00:10:30,560 --> 00:10:31,010 Cool. 139 00:10:31,310 --> 00:10:31,580 See you. 140 00:10:31,580 --> 00:10:32,240 Next lesson. 141 00:10:32,270 --> 00:10:33,050 Have a nice day.