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Hi to all Piter ninja's, welcome to this video.

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Now, once we have completed the parts, the main parts of our group, let's talk about a closer topic

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and that would be important.

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All right.

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So up until this point, we have encountered a classes in the aspect of creating a class.

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Doesn't matter if it's a parent and the child or even both, and executing that these methods of that

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class using an instance in the same module.

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But in real life, sometimes it's a bit different, OK, that some of you is going to apply and be accepted

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into I.T. companies.

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And over there, obviously, teams, development teams are not working on one file.

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All right.

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They're working on multiple files, maybe several hundred of files.

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And these files are interacting all the time.

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They're basing data from one file to another.

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One file can execute other files and basically everything is possible.

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So this is the topic that we're going to study today.

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OK, the interaction between the files can be can be implemented by using a special special property

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or special functionality that is called an import.

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Right.

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And this is what I'm going to talk about right now.

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All right.

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So let's begin.

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So let's assume the following thing.

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We're starting off working on a new project.

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And in that particular project, we have classes.

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The class or multiple classes will be held off in Module A by their execution, will be kept in a different

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module and let's call it module B.

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So basically what we are willing to achieve is, is to execute the class or classes methods by Module

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B, but this Module B should recognize all the content that we have created in Module eight.

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So there must be some kind of connection between them.

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All right.

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And these type of rules and these type of relationship between modules appear in every real project.

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All right.

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There that thing this relationship between modules can be achieved by the import keyword.

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And this is what we're going to learn right now.

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And let's see how to do it.

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OK, this lecture, we're going to focus on the homework assignment that you had in an inheritance.

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We have created there a child class, a parent class.

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And also we have execution lines at the end.

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So we are basically going to take the code, the answers code from that homework assignment and divide

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the content of that module into three separate modules if you came up with the resolution by yourself.

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So apply the following theme that we're going to talk about on your resolution.

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If you had some trouble and you don't have the resolution for it, just go back to the resolution video

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off inheritance in object oriented programming.

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I think it was the previous lecture.

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And you can have you can get the attachment file.

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You have an attachment file of P y file, which is a python file, and you can just copy its content

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or imported into your picture and then you would have the code.

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And upon this code, we're going to do some manipulations and changes right now.

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So basically, I'm going to talk about Feary right now, and a few seconds after we'll finish this slide,

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I'm going to open by charm and see show it to you in a live example.

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All right.

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So basically, we had their one module, which had employee class and which was the parent, and also

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we had a program, a class which was the child.

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And at the end, we have we had an instance of an object, two of them.

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And for each one of these instances, we have executed several methods.

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OK, this is the whole content that we had in the homework assignment of inheritance.

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And we're going to take this content in separate, separated two, three separate modules.

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OK, so first of all, what are we going to do is to open PI charm and create three modules with these

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names?

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OK, as we're speaking, you can do it and apply what I am teaching now in your pie charm.

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And as I just said, I'm going to show you at the end how to do it.

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But if you are willing and you want it so you can apply what I'm seeing right now as I'm speaking in

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your pichon.

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So you need to create these three modules, right?

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Import, parent class, import class and import execution.

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Once you have these three files, please paste into the import bank class.

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All the content that you had off employee class from these homework, all what appears inside the employee

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class, just paste it into this class and into this module.

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OK, the class, the unique method, all the classes, method import, all of that into this module.

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Simple as that.

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Can you use copy paste then go over to the programming class, which is much smaller and copy all of

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the programming class content into this module.

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And once you finish, then go to the bottom of the page where you have the creation instead of instances

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of these classes.

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Yeah, and you have also the execution of the methods and copies of all of that content, all the execution

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parts into this module.

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All right.

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So now we have basically breakdown breaking down the the homework into three separate classes.

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And now I'm just going to show you exactly what I meant.

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OK, so copy all of this.

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Place it in one module, right, then copy all of this, place it to the second module, not I'm not

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sure it's the second, but place it in the child import child and then copy all of this and place it

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in the execution module.

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All right.

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Now let's continue.

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Each of these in each of the above marked modules, we would find an error or write an error is indicated

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by a red line which will appear below a certain phrase.

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OK, it's like it's like a line that goes like this.

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UPS and downs, ups and downs, red line.

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And you can find in these two marked modules and error inside them.

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All right.

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And now we'll try to resolve these errors.

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OK, so first of all, we're going to discuss import child class.

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That's the program.

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Our class.

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Yeah, that's the class that will contain the programer.

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Right.

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So we have an area there basically that that indicates we have an error in the in the declaration line

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of the class, we have their class programer and in brackets we have employee.

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So under the law, the employee, we have a red line.

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This indicates an error.

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OK, so let's follow these steps.

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So first of all, click on the word with the red line below it.

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Then you would see a red ball because it appears to your left.

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Click on it, then you'll have a pop up menu opens and you will have imposed this name.

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So click on empathies name and then please import the line that says.

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Import bearing class, that employee, and before you click it.

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What we're basically doing is, all right, we're importing from import paned glass.

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This is the name of the module.

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And then we have DOT.

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And then we have an employee, employee is the name of the class that we we're importing, we have an

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air or below the war, the employee.

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So now we're importing employee what basically is missing for this module.

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And once you click on the import button on the what you're going to import, you would see suddenly

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an import line is added to the top of your module and it says exactly what import we have just submitted.

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And you can see the red line below the employee word gun.

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So we have resolved the arrow that we had in this module.

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And basically what we did is, is we connected the the import child class module with the import parent

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class module.

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OK, we have connected these two and now once we are trying to inherit in program a class from employee

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class, now we have this import command which which connects these two classes in these two modules,

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and now they can like sort of speak discuss between them.

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They can trade data between them.

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OK, so we have the same error.

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We have the same type of error actually in the import and execution file.

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OK, where we pasted all of our lines of creation of an instance and an execution of methods, all of

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that will appear there.

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So there we have an error below the class name programmer.

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OK, this module does not recognize the word programmer, which is a name of a class who does not know

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what that is.

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So what we're going to do is, again, click on the red.

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Click on the red ward that has this error, then you have the right bulb sometimes after clicking on

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the word, it takes up to two, one or two seconds for the bulb to appear, then click on the bulb,

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click, import this name and then import are where you have the name, import child glass, dot programer

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once you click.

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And that also an import line will be added to your top of your petroleum model file and you could see

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the error is gone.

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All right.

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Now let's go to example of what we have just discussed and it will take only a few seconds because actually

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it's a small topic, but it's very important.

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All right.

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If you want to become professional programmers, this is very important.

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So this is the error.

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Just clicking on it, then I'm having here the bulb, then clicking on this name and then I can see

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here import class employee.

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All right.

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So I clicked on it.

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You see, the error is going on here.

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And you can also see that this import line is added to the top.

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And if you hold your control, file a control button and click with your mouse on this loop, you can

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see I'm redirected to the import ban class.

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Yeah.

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So these two are connected now.

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OK, so you can see that this line right here tells to the module what this means.

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And the we were going to the execution file import execution, we can see an error here as well.

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Same resolution, click on the error ward, then click on the bulb for this name and then just import

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childless dot programmer and brackets employee.

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OK, so you can see the important edit here and the arrow is gone, OK, it's all nice and good, but

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it's all gone.

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It all comes down to business.

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It all comes down if this would run or not.

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So right now we are marked.

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Add the import execution file right here.

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Let's just try to run it and see if this whole import thing works and if these three one, two, three

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modules can actually discuss between themselves.

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All right, Ron, there you have it.

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All right.

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There you have it.

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So right here, you can see the execution running perfectly.

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And these three, OK, these three files, one, two, three are communicating perfectly the understanding

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each other and their spacing data among and between them.

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So I think this covers the part of import, basically, at least what I've encountered.

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I know that all project in professional programming in I.T. companies always and I've seen lots of project.

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All right.

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I see I've seen CRM projects.

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I've seen professional website projects.

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I've seen automation projects, you name it.

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All of them are structured in a certain way.

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They have dozens of files in these files are talking between them.

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All right.

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So you need to be familiar with this important keyword and how how does it work?

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And basically, each project, the team leader arranges the files in a logical way.

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OK, like metaphorically if you have food.

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So you would have a module for fruits, a module for meats like meat, food and different file for,

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I don't know, Candie's.

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Right.

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So you can't have a mix of all of them because you could not understand the meaning of this file.

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All right.

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It's like a metaphor, but it explains the idea perfectly.

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So you would need to understand this import keyword in order to have the ability to separate your information,

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your data, and to place it in the right place in your project.

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So other teammates will also could follow your steps once you created some code and understand what

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you did so you won't have a mix of things in the same file.

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OK, this summer, the import lecture.

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Thank you for listening and I'll see you in the next lecture.