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Biton or be approach that is object oriented programming approach.

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Python is a mighty paradigm programming language as it supports different programming approach, and

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one of the popular approaches to solve a programming problem is by creating objects.

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And this is known as object oriented programming, that is, or B, so objects will be doing everything.

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So that's why you will be defining objects and using objects, be writing our code.

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And that is why, despite what is known as object oriented programming, language and object has two

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characteristics.

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The first one is the attributes or messages.

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That is, what are the different values these attributes can hold and behaviors or methods which will

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define that.

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What are the different palmitate operations that we can carry out on these attributes and messages?

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So let's take one example, so dog is an object, and it, as it has that name, age, height, weight,

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color, are the attributes and barking, wagging and this running are the respective behaviors.

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So the concept of object oriented programming in Python focuses on creating reusable codes that meets

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once the code will be defined, will be written.

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We can reuse that code as when required.

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So reusability will be enhanced if you go for the object oriented programming, because whatever the

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methods you are going to write, that can be used for any number of times.

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So this concept is also known as dry.

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That is, don't repeat yourself.

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In Python, the concept of object oriented programming follows some basic principles.

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So what are the principles where basically had three principles, that is the inheritance.

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Next one is the encapsulation.

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Next one is the polymorphism.

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So a process of using details from a new class without modifying the existing class.

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So the process of using details from a new class without modifying the existing class is known as the

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inheritance where the reusability code is getting implemented.

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That means there will be having one class from the class will be taking the respective methods and attributes,

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respective messages and methods in another class, and we can go on adding some other methods and messages

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as applicable.

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Next one is the encapsulation that is hiding the private details of a class from other objects.

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So class is nothing but a common blueprint for all the alike objects.

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So that is known as a class and in case of encapsulation, it will hide those private details of a class.

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And next one is a polymorphism.

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That is a concept of using common operation in different ways for different data input.

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So this is known as polymorphism.

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Whenever multiple things are the same thing will have a different name.

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Rather, I should say the same thing has got a different name, then we can call it as a polymorphic.

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So that's that's why its concept of using the common operation in different ways by saying different

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data input is known as a polymorphism.

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So these are the main three pillars of object oriented programming.

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So let us go for one demonstration, which will be showing you that how this python has become object

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oriented.

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In object oriented programming in Python, we define class and objects.

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We know that instance of a class is known as an object.

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An object consists of multiple different messages which will be holding different values and methods,

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which will decide who will determine the palmitate operations that we can carry out on those messages.

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Here we are defining one class.

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The name of the class is mainboard and this class is having three different methods.

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The first method is very special is underscored, underscore in it, underscore, underscore.

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This method is known as constructed.

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A constructor name will be will be Ollis underscored underscoring it underscore underscore irrespective

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of the class name.

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And it will have the prototype which will be having oneself as input argument.

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So this self is actually denoting the object reference that was object which will be created under this

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class.

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And this is also known as this reference.

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So this is this particular unit this constructed is having only one statement to get printed.

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Also, we are having other methods, that is of what type, and we are having the method that is cancer

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in whatever method is having this string to get printed.

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And this cancer is also having this string to get printed here.

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So in this way, we have declared the class body mainboard.

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So now we are going for this might Barat.

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And here we are having one instance, Biddable Spice's, which is having this string that is a bar here,

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and this is of a constructor which will print this respective message.

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And here we are defining two instance variables separately.

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One is name and age, which will get initialized with this input parameters.

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We are having another method that is that can sing.

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And this from this method are returning one string.

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And this is a string which will go on returning.

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And you see here we are passing this name as a placeholder content and this song as a placeholder content.

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So in this way, we have defined this my better class here.

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So now we are having the next class that is a penguin.

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This my penguin is inheriting the class mainboard.

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You can easily recall that this my bird was a class.

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And if you go on executing, you can find that it is having no method has been called from this mainboard

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class.

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So that is why it is producing no output, only the mere declaration we are having.

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And now we are having this my parrot and this might I have executed.

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So no, it has been observed.

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Now this is my penguin.

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This is one class which is inheriting properties from my part.

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So my bad properties means these properties will get inherited.

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We should know that when we are having one method or one message preceded by the underscore means,

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it is a private under the private and double undertaken means it is strictly private.

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Private members cannot be accessed from outside of the class.

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So this is my penguin, which is inheriting my bird class and it is having their respective constructor

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here.

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And who is calling the best class constructor?

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The best class means that my bad my bad constructor can only be called using dot underscored underscore

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in it underscore underscore method.

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That means we are calling the best class constructor.

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This super method is actually denoting the best class name.

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And what about the name of the best class it can be for using this super method and it is calling the

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best class constructor in the local function.

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But we are writing this that Pinguin is ready.

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Next one.

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You are having this.

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Who is this is a respective string to get printed can run.

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These are the method, the respective string will get printed here.

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So in this way we have defined my pinguin that this we have defined the my pinguin, which is inheriting

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mainboard class here.

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OK, so I'm writing this one as my pen.

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That will be better.

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So my penguin class inheriting the attributes from my bird class here.

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So now let us go for that instantiation.

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That means we shall declare some instance of the class in sense of the class means we're defining the

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object of the class here.

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The class name is my parrot.

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So we are calling the constructor so empty.

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One that is a parrot.

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One is equal to my parrot.

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My better one will be the name and then will be given as the value for this here.

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So you can find that it is will be passed and the name will be passed here.

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So that's why we're having this.

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My parrot one is a name and ages, then my parrot too is the name.

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Pipetting is the edge here.

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So in this way you have defined two objects.

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What is important and that one is mprda it is actually denoting my parrot one on my part or two.

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So now to access the class attributes we can write in this way.

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Impey one is eight so we can go for format and now be one dot class dot spaces so we can have this one.

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So this is nothing but one message.

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I think one member, whether we define that is suspicious and it is not under private because we haven't

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given any kind of underscore single or double before the is.

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So it is under the public school can be accessed from the outside.

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So that's why we're having this empty one dot class dot pieces.

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And now had we are having this is also a also the placeholder is there and format importunate class

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dot businesses.

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So now we are going for this.

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That is an instance aquiver.

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So now we are going for this empty one dot name, an empty one dot aides are going to get printed using

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this particular placeholders and dot format method so we that can string that windshear.

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We're having one method that is accounting.

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This can think you can find that this can be defined here.

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So it is our method is can sing.

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This particular method requires one string as input document the aspect of the song name.

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So here we are passing this, this IRP so that is the can sing is taking this particular string as input

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document and now we're having this.

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So let me go for the execution for the better clarity.

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You can find that.

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So my parrot class constructor is executing, so whenever we are calling this particular constructor

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to instantiate instance variables of this, my parrot, then my parrot class constructed is executing

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two times because we have defined two objects here.

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So just going to this, my party can easily find that he had written this my parrot class constructor

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is executing.

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So this line is producing the requesting as output and hear the name and age are getting initialized

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with this input parameters name and Agere so he can get it.

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OK, next we're going for this.

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That is the empty one is a you see MPLX one is a bird and MP two is also a is also a bird.

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Because here this business we initializes species with the string Baade here.

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OK, now we are printing this empty one name and one dot age, and it is giving the value as to my parrot.

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One is my favorite, one is 10 years of age.

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I mean, two is 15 years of age.

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So head MPU, MP one, that name is getting my parrot.

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One, we give that give that name and age.

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You have passed as ten.

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So they are getting printed and in this case to not name is getting instantiated with this my parrot

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to an MP 2.8 is getting instantiated with this whuppin.

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So accordingly we are getting the required outcome.

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So now we are having this can sing.

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So this is this particular method is producing this outputted.

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So here you can find that here we are going to have our output.

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That is my parrot.

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One can sing chirp.

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And here to see we have this particular string, C.H. IRP, there is a chart here.

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So this particular string is getting printed here because if you go to this can sing method, you can

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easily find that here we wrote this one, that is the respective name can sing this song here that this

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song has got initialized with the string scharper.

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OK, now we are going for another one, so we are going to define one object under the glass, my pinguin.

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So now this is our class might be and it has got the method that is.

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Who is this?

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And can run.

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These are respective strings are going to get printed using the printed function.

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So you wonder who is this busy one that can swing and bid you one dot can run here so you can find that

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this particular class, my pinguin, is having the instance functions, that that is our who is this

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and can run this mainboard.

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This my board that already defined.

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Here it is.

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I mean the method what type and can swim.

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So as a result of that this my pinguin is inheriting my part.

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So as it is that my body's defined the methods, the different methods can has got inherited into my

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pinguin so they can be accessed.

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So here to abuse this Bidgee one that can swim and pigeon dot can run here, you can easily find that

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inboard we're having this can swim and in Penguin we're having this can run.

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But from the might be an object I can access both can run and can swim.

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Exactly.

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So now you can find this one.

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So if, if we execute then Behnken is ready.

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This particular message is getting printed from the constructor.

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So here we are having the constructor here to operate in this.

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Pinguin is ready and now we're having this.

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I can swim, I can run faster.

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This I can swim.

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I can run faster.

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I can run faster.

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Has come from this can run, which is defined within this my being class, but as it is inheriting my

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weight class.

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So from my part I can swim now that is I can swim.

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This particular message is getting printed as we call this can swim method.

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So I think from this particular example, you are getting this idea how to define one class, how to

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define one object, what is inheritance?

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And when the inheritance is taking place, then how to access and the best class members from the class

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objects.

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So I think you are getting this idea.

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This is a record upward.

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We are going to get printed.

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So now let us go for it on the part.

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So here you are defining one class that is a personal computer to show you that what is that encapsulation

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in subject encapsulation, the member variables and the member functions will get encapsulated within

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the class.

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So in it, as I discussed earlier, that in it is nothing but one constructed here.

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This Max computer prize is nothing but one instance variable which has got initialized with the value.

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Twenty thousand.

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We're having another method that is a myself and having the method set max computer price so you can

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find that these are respective bodies are there and set max computer price is taken this price as input

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parameter and that price is instantiating or initializing max computer price.

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That is the instance variable.

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It is this personal computer class where you find one object, the name of the object is busy, busy

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myself.

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So this method is going to get executed.

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President Max Computer Prize.

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We've just upgraded that one using 30000 here.

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So beside myself, you see the respective method will get printed and set.

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Max computer prize.

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Again, we're calling this set Max computer price method, passing this price as input document input

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parameter, which will initialize this Max computer prize in standard variable.

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So again, if you go on printing myself, then obviously I shall be getting this updated prize here.

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So now let me go for the execution.

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You can find that selling price is twenty thousand.

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Initially, the selling price will be 20000 because max price within the constructor got initialized

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with 20000.

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So whenever we call this out myself.

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So Max Price has got printed as 20000.

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Opta that we did some update directly using the instance biddable.

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Then we did some update using this set Max computer price method and here the price has become 30000.

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So MYSEL has printed the selling price at 30000 after doing the opposite with the 40000 pieces that

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might sell.

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This method is printing selling price as 40000.

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So you are getting this idea how these glasses are having the respective messages and the methods encapsulated

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within the class.

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So I think now you are getting the idea in case of Python, how we can implement object oriented language

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features.

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Thanks for watching this video.