1 00:00:00,930 --> 00:00:01,650 Hello, dear friends. 2 00:00:02,550 --> 00:00:06,000 In this lesson, we will learn the constructor function in Python. 3 00:00:08,820 --> 00:00:13,650 Now, if you do recall, we created a class in our previous class. 4 00:00:14,400 --> 00:00:20,100 So with the help of this class, we created new objects, but those objects, attributes and values 5 00:00:20,430 --> 00:00:21,210 are the same. 6 00:00:21,960 --> 00:00:27,090 So what if we want to create different objects with the same attributes, but different values using 7 00:00:27,090 --> 00:00:28,170 the class that we created? 8 00:00:29,220 --> 00:00:33,150 So for this, we can use a special method named in it. 9 00:00:34,440 --> 00:00:36,420 Also called constructor function. 10 00:00:37,560 --> 00:00:41,820 So, first of all, let's have a look at the content of the my own object that we created. 11 00:00:43,920 --> 00:00:45,660 Dear my phone. 12 00:00:50,100 --> 00:00:55,590 And as you can see, some of them we created ourselves, but the rest of them we didn't. 13 00:00:56,190 --> 00:01:01,380 So these methods are specially defined when an object is created by Python. 14 00:01:02,040 --> 00:01:06,960 And if we don't specifically define them, then, well, Python defines them by default. 15 00:01:08,180 --> 00:01:10,430 Now, here we also see the init method. 16 00:01:11,240 --> 00:01:16,490 If we define this method ourselves, we can initialize our objects with different values. 17 00:01:17,950 --> 00:01:23,200 So this method is the first function that's automatically called when creating our objects. 18 00:01:24,790 --> 00:01:30,550 So by defining this method specifically, we can create our objects with different values. 19 00:01:31,030 --> 00:01:35,080 So let's make up an example so that we can better understand this. 20 00:01:36,450 --> 00:01:38,040 Class phone. 21 00:01:39,310 --> 00:01:42,400 Death in it self. 22 00:01:43,720 --> 00:01:44,200 Print. 23 00:01:45,400 --> 00:01:46,780 The function was called. 24 00:01:49,450 --> 00:01:53,290 All right, so when we run this code, we create the phone class. 25 00:01:54,650 --> 00:01:56,930 Now create an object named phone one. 26 00:01:58,190 --> 00:01:58,940 From one. 27 00:01:59,950 --> 00:02:01,120 Equals phone. 28 00:02:03,200 --> 00:02:05,660 And the result is the function was called. 29 00:02:06,850 --> 00:02:09,430 So what does self mean here? 30 00:02:09,520 --> 00:02:09,740 Hmm. 31 00:02:11,110 --> 00:02:17,380 The key word self is a reference to the object when we create it, and it is a parameter that should 32 00:02:17,380 --> 00:02:23,530 be present in our methods in the very first place, so we can use all the properties and methods of 33 00:02:23,530 --> 00:02:25,390 an object through this reference. 34 00:02:26,350 --> 00:02:31,810 So when we create an object, Python automatically sends this reference to the methods itself. 35 00:02:33,690 --> 00:02:36,930 So now let's have a look at some more details to our class. 36 00:02:37,910 --> 00:02:39,210 Class phone. 37 00:02:39,860 --> 00:02:42,560 Deaf in it, self. 38 00:02:42,980 --> 00:02:50,720 Brand model color camera MP HDD Ram platform. 39 00:02:55,890 --> 00:02:58,050 Self-taught brand equals brand. 40 00:02:59,430 --> 00:03:01,650 Self-taught model equals model. 41 00:03:03,110 --> 00:03:05,180 Self-taught color equals color. 42 00:03:08,200 --> 00:03:11,500 Self-taught camera MP equals camera MP. 43 00:03:13,900 --> 00:03:16,870 Self-doubt HDD equals HDD. 44 00:03:19,870 --> 00:03:21,940 Self-doubt rim equals ram. 45 00:03:22,940 --> 00:03:25,400 Self-taught platform equals platform. 46 00:03:28,730 --> 00:03:31,160 Great, so now we can create a new object. 47 00:03:32,430 --> 00:03:35,850 So let's create an object named my phone. 48 00:03:38,020 --> 00:03:41,380 My phone equals phone Huawei. 49 00:03:43,290 --> 00:03:44,910 Mate, twenty pro. 50 00:03:47,460 --> 00:03:50,100 Black 40 MP. 51 00:03:51,060 --> 00:03:53,190 128 GBE. 52 00:03:53,580 --> 00:03:58,020 Six GBE Android nine, dot zero. 53 00:04:00,060 --> 00:04:04,170 And our object has been created, so let's look at my phone attribute. 54 00:04:05,330 --> 00:04:11,630 My phone, Dr. Brandt, the result is warui, my phone, DKC color. 55 00:04:12,910 --> 00:04:14,260 The result is black. 56 00:04:15,990 --> 00:04:19,980 And as you can see, the attributes, values are the same as we define. 57 00:04:21,180 --> 00:04:25,020 All right, so now let's have a look at another object named John's phone. 58 00:04:26,640 --> 00:04:28,980 Now let's look at John's phones attributes. 59 00:04:30,560 --> 00:04:33,350 Apple iPhone X. 60 00:04:34,760 --> 00:04:37,250 Silver, 12 MP. 61 00:04:38,830 --> 00:04:40,570 64 GB. 62 00:04:42,420 --> 00:04:49,230 Three GB Iooss 12. three John's phone got brand. 63 00:04:53,350 --> 00:04:56,860 The result is Apple John's phonecard color. 64 00:04:58,420 --> 00:04:59,560 The result is silver. 65 00:05:01,310 --> 00:05:07,310 So see that we created two different objects with the same attributes, but different values. 66 00:05:07,790 --> 00:05:09,290 So that means we've achieved our goal. 67 00:05:09,650 --> 00:05:17,570 However, I want to talk about one last thing about this topic, and we can also write the init method 68 00:05:17,750 --> 00:05:19,400 with default value. 69 00:05:19,670 --> 00:05:21,410 So let's have a look, see how that's done. 70 00:05:21,680 --> 00:05:22,400 Follow along. 71 00:05:31,810 --> 00:05:34,480 Right, so now let's create another object named Jack's phone. 72 00:05:36,850 --> 00:05:39,130 Jack's phone equals phone. 73 00:05:42,050 --> 00:05:44,540 Zao me am I? 74 00:05:49,250 --> 00:05:49,880 Nine. 75 00:05:51,780 --> 00:05:52,320 Blue. 76 00:05:55,030 --> 00:05:57,040 And that's a look at the attributes. 77 00:05:58,750 --> 00:06:00,460 Jack's phone got brand. 78 00:06:05,620 --> 00:06:06,940 The result is Ayame. 79 00:06:09,630 --> 00:06:11,310 Jack Phonogram. 80 00:06:14,730 --> 00:06:17,100 And the result is no information. 81 00:06:18,310 --> 00:06:19,000 What do you think? 82 00:06:19,420 --> 00:06:23,530 So as you can see, we can create an object using classes. 83 00:06:23,860 --> 00:06:26,770 We don't need to define all the values of our object. 84 00:06:27,460 --> 00:06:33,430 But just because we don't define it, we don't get an error when we create the object, because Python 85 00:06:33,430 --> 00:06:35,470 automatically assigns a value to it. 86 00:06:35,830 --> 00:06:36,220 Cool. 87 00:06:36,430 --> 00:06:41,530 So here the Yassine value obviously is no information, and that's it. 88 00:06:41,950 --> 00:06:46,120 So in this lesson, we learned the constructor function and how to use it. 89 00:06:46,840 --> 00:06:48,580 So I want to see you in the next lesson. 90 00:06:49,150 --> 00:06:52,240 So practice if you need to otherwise have a nice day.