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Hello, everyone, in this video.

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We start putting the core of each function function in this case, we have just two functions.

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So we put the core of each function actually for this function.

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For example, we have already the core, which is this one.

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Which is this one, this is the core of that function, because the function that will talk is this

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one which will take the PDAF and convert it to a text and after that, convert it to you and say it.

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So what we need just what we have to change in this front, in this part, which is this call that we

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will put in that function, is the path because this function or this part works just with one part,

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which is this one book point Bedier.

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But if we want to because we want what we want to create a program or a application that will open and

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convert any idea.

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Which means, for example, if today I want to listen to a book or tomorrow I want to listen to another

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one.

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So in this case, I don't want to go in each time and go here and take the path or something like that.

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But I want that because for that we push the button open that will go and take the path of the video

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that we want to listen and put it here in our program.

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So as you can see here, this part is the part of is the core of this function, which is.

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But before that, we have to return the path.

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So we will do that using this this class, which is all disclosed, which include included in interlibrary.

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So this dialogue will help us to open a file dialogue.

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And after that, we will choose a file and that function will return the path of that PDAF or something

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like that.

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We do it step by step.

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Don't worry about it.

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Now, here we have to declare a path, but we have to put it as global.

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Why?

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Because if we would put a just a variable inside, this function means that this variable is defined

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in this function.

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But if we want to use it or if we want users in another function or another space, I don't know, for

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example, if we want to use in this script or something like this, this path or this variable will

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not be defined.

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So because it is just for that function.

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But if we want to if we created as a global variable in this case, it will be a it will be defined

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in any function or any script.

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So here is the name Gload.

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The will give it to Global, then here we give it the name.

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But and before that I want to initialize it.

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But we don't want we don't want to initialize inside the function because if we don't if we don't call

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the function, the Hollywood will not be initialized.

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So we have to initialize is out of the function.

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So here we have path equals one.

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That means that it is empty, that it has nothing value.

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So here after an issue, after creating an initializing the variable, we have to put the right value

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on it.

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So here we have both a call file dialogue that ask for open filename.

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So this function as open filename will open for us a file dialogue.

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So after this file dialogue, we can choose any file we want.

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Then all this line will return the path of the file chosen.

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So in this case, we will return the path of the PDF chosen or the video that we want to see.

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So now it is OK for this function.

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We do not need to add anything.

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We will just save it and see how it looks here.

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Here, our application.

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If I click in open, you can see that it will open three.

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That is a problem here.

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But here and open.

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We're on again.

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What it is not working.

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But sorry, I forget, I always do that because this one is a function, so if I don't add the parts,

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it will not recognize that it is function.

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So we have to add it.

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Now, I have this one.

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I have to close it to open the new one.

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So this one here, if I open it, will open for us this final.

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And also we can choose any file we want.

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So for example, this video that we want.

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So if I click on it two times, it will open it.

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But for this moment we can't see it because we didn't do anything with us.

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But if we want to see how it looks, will just print it.

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So here I will print this path so we'll see what this function will return.

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Now is an open book.

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As you can see here.

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This is my PC down here.

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We have the document and audio, that audio book, then the name of the PDA, which is book that PDA.

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OK, so this is that's what we what this function returns.

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So I would just close this one.

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Now, what we have to do, we have to use this parts for our program, which is this one.

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So we just take this one here, come and see or see if you are in windows, then we'll post it here.

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We have to watch the space, which will be in the core of the function.

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OK, so now as you can see, we have always this this part or this constant part, but we want to make

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it possible for each file or for each file choose it.

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So what we need to do is to it to push the path here.

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Now we have this one, but and this is the volume.

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So we will try it and we will see how it looks.

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There is some changes that we need to do for that.

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I will just run to see how it looks and how it works, but after that we will change it.

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So here I would click in Open.

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I will take this, for example, at 8:00 told, as you can see, we can't we can see nothing for the

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moment because we didn't initialised our path.

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So there is another problem because we didn't add the other functions as we speak, because here we

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have speak that say, but we need to add the function that we that will run this speaker.

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So here we have speaker that on this one function.

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Now you will see that it will work like this here.

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If I will open the PDF book like this and talk abstract three, it follows on resources or some form

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of health care rationing is that we choose an unavoidable.

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This implies that.

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Just stop it for a moment.

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Now, as you can see, it works.

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But there is a problem.

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For example, if we do not click in this button, which means if we don't choose any bedier, so this

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function, what what does it have for Abath or as a file, it has nothing because this part is empty

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and it will give us an error.

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We do it here so that you can see if I don't click it open, which means if I don't choose anybody,

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if I will just click on talk so we will see that we will have a problem here, if I will.

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In turn, we have an error here because that type, that variable path doesn't have has the value empty,

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which is not, in other words.

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So that is we don't know, we don't have any path that has the value or not.

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So in this case, we have to add a statement to see if the value of path is empty or not.

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So if the value of a path is empty, we don't want to run this program.

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So we don't want to have any errors.

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But if the the path has a value in this case, we want to run it.

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So to do this, we have just to take.

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All this here, sorry.

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Just here, come on, X, then we will add if.

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And that's it, because we can write it but equal three equal to sorry or something like this.

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But the easiest way is if passed, which means if that is true, if we write it just like this, if

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but if the part is not empty or something like this, then here we will put our program.

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Now we need to make space here.

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You like this now?

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Once we have to do if we were on our program, I will show you here, not if I will talk without clicking

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on this button.

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You can see that there is no error here.

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But if I click and open in this case, I can choose an immediate and total abstract three abstract.

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It follows from resource scarcity that some form of health care rationing is unavoidable.

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OK, as you can see here, this is the program that was it is great.

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But there is something that we didn't talk about that we didn't add actually.

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So which is the page gets page because in this case it will always take the page number six.

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We had we had add that we have the right to change any book we want, but we have always the page six.

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But if I want to make even the number of the page variable, which means in every time I want to read

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a book, for example, I want to be the first page or second page, etc..

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So in this case, I have always to put the name or the number of this page that I want.

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So for us, we had we we added this entry.

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Where is it?

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Smokes books.

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This one, this one titled those books Beige Book, sorry, so this entry will take the number of pages

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because here we have.

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The application here had applications, so this entry will take that number of pages that we want,

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so we will take or we will get the text or the number that we have in this entry and we put it in our

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function and you will see that it is easy to do that here.

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We have to take it.

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So here we have a page and I will give it and page for page number, then here, then here.

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We will give it.

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We will take it.

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Or we will get the number that we have in that page.

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So here what we have the engineer, which is page number of books.

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That's one that gets this one.

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So this very page page and will get the name from that entry.

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So but then we will have the same problem if we don't write any number of or if we don't choose any

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page of the book.

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In this case, there is nothing to do.

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So in this case, we have to put a here.

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We have to add it in the condition, which means if there is no type or there is no number of the page

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in this case, we can't run anything because we didn't choose or we didn't we didn't choose or take

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or not is the name or the number of the page that we want to read.

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So here we have to put and which means if the path is true and if the page number is defined.

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So if we have chosen the path and we have chosen the page of the we have chosen the number of the pages

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that we want to listen or to read, in this case, you can run this program.

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But here we have six discussions.

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But we know that we want to put is variable, which is Page and this one.

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So in this case, in every time we post the number of the page in that entry, it will take it and see

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the condition if this is true.

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But if I will run it just like this, we will have a problem.

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I will show you how it will look.

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I am just doing this so that you can see the problem.

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Maybe you are not a programmer and you don't need this, but sorry, I just want to give you all the

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the weight or all the errors or something like these issues that you can find so that if you are doing

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your program and you will find some issues in some or sometimes in this case, you will know what is

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the problem is.

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OK, so here if I will just open I will open the PDF like this, this one.

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And if I will put here, it will it will.

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It will talk.

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It won't talk.

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Sorry for the talk, it won't talk as you can see because we didn't find any name of we didn't define

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the the number of page here.

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OK, because here as you can see we had a page and read file and here we have this page, but we didn't

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give it the number of the page so that it can tell.

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It can't read because what we did was we didn't give it the page.

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But the error will be in this step.

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For example, if I will give you the basics at the same page as we had before, if if we see that you

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can you can say that, yes, there is the number six and it will talk.

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So I will open it again.

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For example, I will open this book is already opened, but I just want to do it again.

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Now, if I click in, Turkey will see that there is an error here, here.

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So this error.

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Why?

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Because the entry will return a stream variable, which means we can see that it is six, it is a number,

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but the type of the six is a string.

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But this function doesn't take the strings but take the and the integral integer.

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Sorry.

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So we have to convert this variable from the string to integer and it is easy.

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I will just close this one for the moment.

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Now what we have to do, we have to click and then like this that says we have to convert the that image

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also does not image that variable or that number from a string to another.

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And now it will work.

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You will see we do it again here, for example, we give it six and I will open the book, this one

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then here, abstract, very abstract.

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It follows from resource scarcity at some form of health care.

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Rationing is unavoidable.

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This implies that potentially benefits.

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So as you can see, this is our application and this is the program that we need.

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As you can see, it is very easy.

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We have to do all the steps to step by step, even if you have never done or you have never used Python.

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So as you can see, you have just simple lines to open the PDA and simple lines to make it on you.

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And here we have this lines to create application step by step.

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After that, we have just to put the core of this.

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This.

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Function talk, which is which will do all the work, so if you want to make more changes, maybe you

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want to change the voice, or maybe you want to change the speed or something like that, it's up to

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you and you can do anything you want for the moment.

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This is the basic project and I hope to see your trying if I want you to try this application and I

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want to see it in my class project.

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So I want you to try any I don't want to I don't want you to do the same thing, for example, for the

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colors or something like that, like this.

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But I want to see if you are able to do this.

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I know that you are able to do this.

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So I just want you to share with me what you will find and what you will get at the end of this course.

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They hope to see all your projects in the projects path.

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And I see you in the next class by.