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And then let's talk about some of the data structures that are very, very useful in Python, and you



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definitely need to know them.



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So the first one I want to cover is the list or the lists.



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So lists usually is just the list of items.



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It doesn't matter if they are numbers or strings.



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And so it is a good practice to have a similar types of items in your list.



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So let's create a list of famous or famous tech companies.



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So let's write a check list.



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And this will be equal to Brackett's, Apple, Microsoft, Samsung.



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Dell and HP.



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So let's see what we can do basically with this latest outage for some operations here.



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So first of all, I would like let's print some of the components inside this list, some of the elements.



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So let's write the print checklist.



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And then I would like to print the elements from zero until two.



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OK, so obviously zero is apple and trees here, but on some.



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But since we say until two, we print only the first two items.



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OK, zero one and we'll stop at two.



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This is how Python works.



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This is the logic behind it.



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So if I run the code, you will see that we print Apple and Microsoft.



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Now, you can also change the elements inside the list by simply writing a checklist, the zero.



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So the position of the element you want to change.



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And here I write this one so you can see that when we print the.



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Checklist, we should get some changes, some quite significant changes, and you can set up Apple was



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changed to test one in our list, then we can do some quite cool operations inside our list.



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Let's see, we want to write a list and we want to remove some of the values there.



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So let's remove in the vault.



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I want to remove is Samsung.



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OK?



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So if I print.



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Then the list I should see that the Samsung has been removed from our list.



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Now let's see some other operations.



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Let's see what will happen if we would like to insert certain or certain elements.



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So let's right here, insert them here.



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You need to specify two things.



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The index where we want to insert the object.



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So you have a presence in the industry.



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And let's say I would like the object to be this one.



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So this means this will be added to a third position.



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And you can see that now on the third position where it was.



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Now it's this one and the NHP, they're shifted towards the right side of our list.



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OK, that's it here.



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And then let's investigate some more operations that you can do.



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So you can actually check the length of the string by doing plain and simple, write the name of the



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list in here.



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You should get printed the length of our string.



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So as you can see, our string have five elements and for that reason, its latest five.



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You can also get some quite interesting objects for your list.



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Let's say we want to check if Microsoft is on our list.



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So I will simply write Microsoft.



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In.



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They placed so here we are checking if Microsoft is syndicalist and obviously the results here will



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be a boolean variable and you can see that we get the results through because Microsoft.



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Is that our list?



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If I were to write this one now.



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You are going to see that will get false because we don't have this when our list.



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That's it, pretty simple stuff.



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Now, finally, if you would like to clear the list, so I will just leave it here to print it, you



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can simply write.



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The name of the list which the list and then clear.



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And now you can see if I tried to print that, I will basically get nothing.



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So when you get this break is here, this means that your list is now, guys.



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I also want to cover one other topic, which is quite interesting.



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And this is a very nice data structure that is very useful when you are developing quotes in Python.



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So this is called dictionary and the dictionary usually have a name of an item and assign value to the



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title.



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I will show you how it's done.



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For example, let's say you want to work in a supermarket and you have certain fruits there with price



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to each fruit.



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So let's write fruits equals and here's how we declare a dictionary.



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So the first item will be.



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Banana and banana will be equal to the zero point.



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49.



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Then we're on our list, what orange, what will be equal to one point five for its price will be 150



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dollars, let's say then at.



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Ethanol, which will be equal to one point all nine or one point all.



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So basically this is our dictionary and let's see what else you can do with the dictionary.



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So if I write.



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Fruits and banana, I can make its price different so I can make the quota to six to eight.



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So your footprint, the fruits after that, you see that the price will change.



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So you can see that now the price of the banana is different.



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It is to six.



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Now, you can also just print the price of certain elements with the right fruits orange.



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This means that the masking for the price of the orange in the price of the orange is one fifty.



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And this is why we have our results to be equal to one.



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You can also add items in your list.



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So if I write fruits May one equal to three, since melon is not in our list, we don't have such a



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fruit there.



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This means it will be added the site.



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So let's run this code and you can see that melon has been added and its price is three dollars.



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And finally, we can simply check if some item is on our list.



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So let's check now if the banana is on our list.



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If I write the print and then banana in.



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Fruits, then I.