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Hi, everybody, and welcome, and this lecture will discuss our fourth and last collection, which

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is Stop all this lecture will cover the basic part of the which will be followed by the dance spot with

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many examples, as always.

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OK, so let's begin this go straightforward to the characteristic list of Toppo.

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All right.

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So Toppo is indexed and ordered, meaning it has indexes for each cell.

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If we compare it to a dictionary or a set that is unordered and on the index.

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So in this case, we can extract values by index.

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Also, tuple cells cannot be changed, same as set.

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So once you created it, you cannot change Sayle values.

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And you can also you cannot you cannot add cells after you create the double and you cannot delete cells

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after you created.

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So these three tell us the tuple is a sort of speak a fixed collection, meaning after you create it,

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do not touch it.

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This is very useful, but nevertheless it's a bit challenging.

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So pay attention once you choose a collection, if you choose tuple, you will have a reliable data

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that will be there forever.

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It doesn't matter if you want to become a web developer or an information developer.

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This collection is very, very useful.

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All right.

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Also tuple is a single value Purcell collection, meaning if we compare it to a dictionary, we had

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there a key and the value for each cell.

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So we had two items in a cell.

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In this case, same as set and same as lists, we have only one item, Purcell and how actually tuple

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can be differentiated from a list.

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So once you see round brackets, you can identify definitely that we are discussing a tuple because

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a list has square brackets while tuple, has a round bracket.

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So this is what differentiates it from a list.

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All right.

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So from here, let's go straight ahead to our example that are following manipulations would be based

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on I saw I created a tuple May called professions in the industry.

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We have meaningful professions here, starting off with round brackets and the quotation marks, which

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will include Excel cell value and Yepp and the way divided with a comma right here.

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So we have front end back and they have all sensu same as last.

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This cell starts from index zero.

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This one is index one index to an index three.

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All right.

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So we can begin now with the basic manipulations upon tuple.

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So first thing first, let's see how can we access a sale by its index?

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So once we want to access a certain sale, we just mentioned the name of the tuple and use square brackets

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with the index cell number inside it.

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So pay attention and do not get confused.

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Once you create a tuple, you use round brackets, but once you want to extract the value from a top,

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you use square brackets.

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So this is very important.

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Remember it.

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And also, of course, as always, you're going to practice it and the following lecture.

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Next in line is, let's see, how can we access a sale by negative index?

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OK, we've seen this material in lists.

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So once we mentioned the couple name that the collection name and we put inside these square brackets,

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the number minus one, we will get the extraction of the last cell.

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So minus one means.

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Give me the last cell if you want one before last.

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Meaning this one just put minus two here and so on and so on.

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All right.

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So in our case, minus one, we'll extract us the Kuai value, which is the last cell value.

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And last in line is how can we access several cells of by range of indexes?

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Again, this material was mentioned in this lecture and I really advise you to go over it again if you

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got confused.

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And basically what that means is once we want to extract several values at once in a range of indexes,

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we should use the following technique.

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We just mentioned the name of the tuple and inside square brackets.

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We put the range.

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In our case, it's one till three.

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And if you recall.

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All right, so from this, this item is not included.

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All right, so in our case, we have cell number one.

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We have cell number two and cell number three is not included, so we'll get only the back end and their

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ops extraction in this case.

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OK, so basically it's a reversal to what we started in this, but here we applied it.

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And Toppo, I think this sums up the basic part of Toppo.

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As you can see, it has a bit different characteristics from the other collections.

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It has some similarity to set regarding changing values.

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But also in this case, you cannot add new cells and you cannot delete existing cells as well.

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And it's basically, as I mentioned, it gives us reliable data that will stay there forever.

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All right.

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So this concludes our first lecture off topic.

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I'll see you in the next video.