1 00:00:00,610 --> 00:00:01,300 Hello, dear friends. 2 00:00:02,320 --> 00:00:09,040 So in this lesson, we will learn inheritance, which is pretty much the most important subject of object 3 00:00:09,040 --> 00:00:10,060 oriented programming. 4 00:00:10,870 --> 00:00:11,620 I'll show you why. 5 00:00:11,650 --> 00:00:12,370 So let's start. 6 00:00:14,410 --> 00:00:18,040 So this is what we've learned so far about object oriented programming. 7 00:00:19,030 --> 00:00:24,310 And again, I will share with you what we've learned in this table in every lesson until the end of 8 00:00:24,310 --> 00:00:24,820 our topic. 9 00:00:25,660 --> 00:00:26,950 So we'll continue our lesson. 10 00:00:28,600 --> 00:00:34,390 So basically, inheritance is when a class inherits properties and methods from another class. 11 00:00:35,050 --> 00:00:41,650 So we can think of inheritance as well, some of the inherited traits that we inherited from our parents. 12 00:00:41,890 --> 00:00:43,270 Now, no judgment here. 13 00:00:43,930 --> 00:00:47,420 But what is a father passed to a son? 14 00:00:47,440 --> 00:00:47,710 Right. 15 00:00:47,920 --> 00:00:52,150 So inheritance in Python has very similar logic. 16 00:00:53,050 --> 00:00:53,360 Right. 17 00:00:53,380 --> 00:00:56,200 And again, with no judgment, we like Python. 18 00:00:56,830 --> 00:00:58,660 So where can we use it? 19 00:00:59,200 --> 00:01:00,950 Well, well, imagine a school. 20 00:01:00,970 --> 00:01:05,890 And in this school, there's a headmaster, deputy headmasters, teachers, students. 21 00:01:06,370 --> 00:01:11,200 Now, if we want to create a different class for each of these some of these classes, well, while 22 00:01:11,220 --> 00:01:17,980 they'll have the same attributes like name and surname, birthday and all that, then instead of defining 23 00:01:17,980 --> 00:01:24,940 these common properties and methods in these classes over and over again, we can define one main class 24 00:01:25,210 --> 00:01:30,010 and then get them to give the attributes and methods of this class. 25 00:01:31,180 --> 00:01:33,700 So that's the logic of inheritance. 26 00:01:34,810 --> 00:01:37,000 Let me just show you how to use it and then you'll see. 27 00:01:38,080 --> 00:01:42,760 So we'll define a new class named teacher class teacher. 28 00:01:44,970 --> 00:01:51,930 Attributes her name, surname, birth, date, profession, gender, classroom, death in it. 29 00:01:52,970 --> 00:01:53,630 Selv. 30 00:01:54,620 --> 00:01:57,380 Name, surname, profession. 31 00:01:58,810 --> 00:02:00,550 Classes, gender. 32 00:02:02,120 --> 00:02:02,780 Birth date. 33 00:02:05,590 --> 00:02:11,680 Self-doubt, name equals name, self-taught surname equals surname. 34 00:02:12,630 --> 00:02:15,840 Self-taught profession equals profession. 35 00:02:17,800 --> 00:02:20,830 Self-taught glasses equals classes. 36 00:02:22,490 --> 00:02:24,890 Self-doubt, gender equals gender. 37 00:02:25,870 --> 00:02:28,960 Self-taught birthdate equals birth date. 38 00:02:31,450 --> 00:02:41,770 All right, so again, define the show info method, def show info, self print, employee information. 39 00:02:47,720 --> 00:02:48,770 And name. 40 00:02:52,300 --> 00:02:53,410 Self doubt name. 41 00:02:56,610 --> 00:02:57,810 And surname. 42 00:02:59,530 --> 00:03:00,910 Self-taught surname. 43 00:03:05,190 --> 00:03:06,390 And profession. 44 00:03:10,840 --> 00:03:12,310 Self-taught profession. 45 00:03:19,040 --> 00:03:20,180 And classes. 46 00:03:22,110 --> 00:03:23,430 Self-taught classes. 47 00:03:25,310 --> 00:03:26,420 And gender. 48 00:03:28,930 --> 00:03:30,160 Self-doubt, gender. 49 00:03:34,210 --> 00:03:35,470 And birth date. 50 00:03:38,440 --> 00:03:40,090 Self-taught birthdate. 51 00:03:42,080 --> 00:03:48,770 All right, so now let's create a new class named headmaster and we inherit from the teacher class. 52 00:03:51,420 --> 00:03:53,340 Will define a method later. 53 00:03:54,420 --> 00:03:56,460 But this is why we use a past statement. 54 00:03:58,040 --> 00:03:58,580 Pass. 55 00:03:59,540 --> 00:04:04,940 OK, so let's create an object named headmaster, one using the head master class. 56 00:04:05,990 --> 00:04:06,800 Headmaster. 57 00:04:13,100 --> 00:04:13,610 John? 58 00:04:15,280 --> 00:04:15,760 Though. 59 00:04:17,750 --> 00:04:18,590 Headmaster. 60 00:04:20,310 --> 00:04:20,930 None. 61 00:04:21,400 --> 00:04:21,930 Male. 62 00:04:23,560 --> 00:04:26,410 Zero one Jan one nine seven eight. 63 00:04:30,070 --> 00:04:34,660 OK, so now we want to see the info, headmaster one. 64 00:04:36,320 --> 00:04:37,730 Dots show info. 65 00:04:40,850 --> 00:04:45,800 And as you can see, we didn't define anything for the head master class, but it took the teachers 66 00:04:45,800 --> 00:04:47,090 classes attributes. 67 00:04:47,780 --> 00:04:48,320 Cool. 68 00:04:48,650 --> 00:04:53,300 Now, also, we can add extra functions and attributes into the head master class. 69 00:04:53,900 --> 00:04:58,850 For example, we can define a method named change class class. 70 00:04:59,060 --> 00:04:59,840 Headmaster. 71 00:05:02,630 --> 00:05:03,140 Teacher. 72 00:05:04,350 --> 00:05:06,150 Death, change class. 73 00:05:07,300 --> 00:05:08,980 SELV, new class. 74 00:05:11,140 --> 00:05:13,300 Print changing class. 75 00:05:16,180 --> 00:05:17,860 Self taught classes. 76 00:05:19,050 --> 00:05:21,030 Equals new class. 77 00:05:24,050 --> 00:05:25,300 And now let's test it. 78 00:05:26,690 --> 00:05:28,940 Create a new object named headmaster to. 79 00:05:36,340 --> 00:05:36,880 Jack? 80 00:05:39,440 --> 00:05:41,180 Though, headmaster. 81 00:05:42,550 --> 00:05:43,170 None. 82 00:05:43,760 --> 00:05:44,350 Male. 83 00:05:46,130 --> 00:05:47,480 Two February. 84 00:05:49,440 --> 00:05:51,120 1979. 85 00:05:52,610 --> 00:05:54,200 Let's see the info. 86 00:05:55,250 --> 00:05:56,060 Headmaster. 87 00:05:59,470 --> 00:06:00,910 Don't show info. 88 00:06:03,040 --> 00:06:04,810 Good, so now we can use the new method. 89 00:06:09,000 --> 00:06:13,050 Headmaster to that change class. 90 00:06:13,990 --> 00:06:14,530 Tenth. 91 00:06:19,350 --> 00:06:22,200 Check the info again, headmaster to. 92 00:06:24,040 --> 00:06:25,450 Don't show info. 93 00:06:27,970 --> 00:06:28,630 And that's it. 94 00:06:28,810 --> 00:06:29,710 You see how that works. 95 00:06:30,280 --> 00:06:31,030 Very cool. 96 00:06:31,840 --> 00:06:35,740 So in this lesson, we learned the inheritance concept in Python. 97 00:06:36,490 --> 00:06:38,190 So we're going to put it to good use later. 98 00:06:38,200 --> 00:06:39,580 So stay tuned. 99 00:06:39,730 --> 00:06:40,000 See you. 100 00:06:40,000 --> 00:06:40,600 Next lesson. 101 00:06:41,170 --> 00:06:41,950 Have a nice day.