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Hi, everybody, and welcome.

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Today, we will discuss Stapel and this lecture would cover the advanced part, theoretical part regarding

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Topal Thapar is our fourth and last collection.

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Let's start over with a quick example, a reminder of how Topal is structured.

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It has has round brackets with items inside quotation marks divided with a comma.

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Those of you who study hard and follow the lectures would find the first manipulation title very, very

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weird.

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Change their value.

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And why?

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Because if you recall, once we discussed Topal basics and two lectures back, I've mentioned Topo's

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characteristics.

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And the three main characteristics were that topple existing cells that cannot be updated or changed.

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New cells cannot be added and existing cells cannot be deleted or so tuple is a basically standstill

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collection that does not like changes.

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So why do we see a change cell value Tyto here?

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Is it even possible?

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So the reason that you see it is very, very simple.

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This course goal is to bring you to a game into make you into a ninja developers.

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I am not looking for mediocre developers finishing these course.

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I'm willing to make you and ninja developers and we are not just going to cover the basic part that

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you can find online.

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You will find you very challenging topics that I will walk you through together.

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All right.

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So like naturally tuple Topal, sales cannot be changed.

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But Python stands for its name because Python is flexible.

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And this is exactly what I'm going to show you this video.

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So there is a trick that can make you that can give you the ability to change tuple cell values.

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Now, we show it to you in the following minutes.

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All right.

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So we learned in previous lectures that Toppo cells are unchangeable, but still there's a way to overcome

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this by declaring.

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So, first of all, before it here in the orange box, you can see our declared the fruit tuple.

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It has banana, it has berry and mango.

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And they're very, very important thing that it's actually not a tuple.

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I created the list here.

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Let me just change it.

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Yep.

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Like this.

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Now it's good.

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Yeah, so I've created here a simple Toppo, and now let's see what we can do.

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So first of all, the clearway list collection, just a regular declaration is always you can see it

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here in the purple box.

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I've created a declaration called Fruit List.

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Then after the equals mark, I casted the existing tuple into into a list is the same as casting a string

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into an end and int into a string.

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Same as we do in print all the time as we doing like as we're doing like this.

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Yeah, we're putting a casting into a string.

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So this, this is also casting what we see right here in the purple line.

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We are casting a tuple into a list.

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OK, it's very easy.

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So now we have all the items of Toppo inside this first list.

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And once we have a list, changing values, adding sales is very, very easy.

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And you can see it right here in the third line in the Green Line Ed item into the list.

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This we already know how to do.

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So I'm just adding cell number in index number one.

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I'm adding a Strawbery.

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All right.

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And then after I added it, I'm casting the list back to topple here in the light light.

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Blue collar cast back double, so you see here, the Topal keyword bolded, and inside it you see the

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list.

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So this casts back to topple and fruit stubble has now the strawberry item inside it.

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It's cool, right?

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So by nature, you cannot change the apple cells.

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But if you cast it into a list, then you can add your your cells and then cast it back to double.

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This is exactly what developers are expected to do to think outside the box.

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All right.

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From here, let's head off to the last next and last manipulation that we learned here in advance.

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Double lecture.

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If you want to create a single cell tuple and we naturally going to do it like this, just declare it.

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And inside the brackets, inside quotation marks, put our value.

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This will give us a wrong.

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This will give us a wrong result.

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And why?

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Because if later on we want to type one to print the type of the variable that we just declared, you'll

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remember this one, by the way.

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I've mentioned it in the previous lecture and in previously lectures as well.

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So once we print the type of something we can get the output, which will be the type of the variable

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or the collection.

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So in our case, once we print this out, we'll get an output of string.

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So this is not what we want.

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We want to create a tuple with a single cell.

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So how can we actually achieve that?

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We can achieve it by using this manipulation.

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We just declared tuple and inside after we we put a single cell here, we just also leave a comma and

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then we close the brackets.

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Then once we try to print out the type of the output will be tuple.

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So this part is irrelevant.

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Yep.

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And this is easy, but it's important to know.

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And once you leave, you leave a comma here, the type of it will become Toppo.

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All right.

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So this concludes the theoretical part of each advanced Stupples.

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In the next video, you will see some challenging assignments regarding tuple, and this would conclude

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our collection part in our course.

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And then we will go straight ahead for more interesting topics.

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Topic part was a bit long topic, but very, very important.

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So don't underestimate it and practice it in the next video.

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Thank you.

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Bye bye.