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Another concept within

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OOP

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is the concept of polymorphism,

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which basically translates to same action but different behavior.

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The thing about polymorphism is that it's going to allow classes

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to have methods with the exact same name

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but then behave differently.

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So as an example, still dealing with the user class,

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we can have different types of users logging in both in a different manner.

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So as an example, let's have different roles.

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So I'm going to create a class for the regular user

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and then a class for the admin user

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and then they're gonna have unique ways of actually logging in. So

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check this out. I'm gonna come in here right now and create class regular

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user.

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OK?

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And now

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I am going to define

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very simply

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the

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method log in

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and self.

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OK. Notice I haven't passed in any attributes whatsoever.

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I'm just going straight to the method. OK? So

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what I'll do right now is

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I am simply going to say print.

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Now,

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I would just say a regular user has logged

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in.

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OK?

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Now look at this, OK? I'm gonna create another class

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and let's call this the admin

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user.

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OK? Hold on.

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And now again, define

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and now the exact same method log in

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self.

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But now

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it's gonna be a different print message

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because now I'm gonna say admin has logged in

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and let me just close this

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and there it is. So now for the actual polymorphism, we're gonna make use of it.

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Let's assign user

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to be equal to regular user. So let's create our first objects in here for

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the regular user.

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Let's also create an object for the admin user.

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And of course, I'll call this one admin equals to

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admin

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user.

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And

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it is so we've created objects for the regular user and the admin user,

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let's now call them. So I'm gonna say user

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dot log in

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brackets and now

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also admin dot log in

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and there you go. So now let us try to run the program

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and there it is

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regular user has logged in,

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admin has logged in.

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So this is the concept of polymorphism where you can have two different classes

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with the exact same method.

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But that method will act in a different manner depending on which particular

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object or class object is calling that method.

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The method used here obviously is the login method.

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It's applicable to both the class regular user

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and the class admin user.

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But it's gonna behave differently because it,

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it's gonna print out a different message

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depending on which class object actually logged in.

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So that's polymorphism for you. Same action, different behavior.

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Thank you for watching the video. I'll see you in the next class.