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Hi, everybody, and welcome.

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So now I see completed variables lists and completed the first part of dictionary basics, we'll see

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much more examples regarding dictionaries by chance and things are going to be a little bit more complicated.

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But as long as you listen to my instructions, everything is going to be just fine.

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All right, then.

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Let's begin.

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So, first of all, let's create a new file in our project and call it.

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Collection's dictionary basics and let's leave a nice comment for the future for ourselves.

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Yep, so first of all, I want to just mention that this video would be a freestyle video that I will

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show you cool.

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Still cool stuff and cool tricks that you can use and dictionaries.

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And part of this video, the first part will be based on the previous lecture and we'll just going to

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see it inside our coat.

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So first of all, let's create a new dictionary and not create the.

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But create.

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Yeah.

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And let's give it a name dictionary example.

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Um, or let's give it more indicative name like employee.

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A new employee.

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Yeah.

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New employee like that.

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And let's start putting values inside.

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Let's give the first.

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So the key uh first name and our employee is David.

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David has a salary of.

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Ten thousand dollars, and he works in a small company that some of you might know called Google.

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All right.

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So first of all, let us just do a simple thing.

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Let's just print the dictionary and see that we're OK.

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Plus, casting and new employee.

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Yeah, so it's runit.

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See that everything's fine.

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Yeah, so we have the dictionary right here great, so we can continue.

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So as you recall in previous videos, in previous video, we found out that we can extract cells with

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two ways, so let's try to use it.

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So get cell.

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Value.

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First, we saw the first way was mentioned the dictionary, which is new employee, and then use square

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brackets and let's extract the first name.

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All right, so you put the key that you want.

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It's value being extracted.

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So we are putting this key and we want to extract the name.

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So it's surrounded with a print action and the comment.

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Yeah, get the value of first name key and let's put casting here.

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Yeah.

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And let's hope, hope for the best.

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Whoo!

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Yeah, so we got the name David and we have extracted the value of first name, so we have also a second

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way.

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So get cell value.

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Second way, anybody remember how do we do it?

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I recommend you to check the attached file to the previous video, the PDF attachment file.

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All right, so how do we do it?

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We we call out the dictionary and then we put that get by the way, notice that we have many options

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here and we will get back to them in a moment.

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So new employee then get and then here we want to extract salary, just a different one.

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Let's do a print and then get value off salary key.

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Yeah, so we want to extract the salary and we'll put here casting of string.

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OK, so let's print it.

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We're expecting the value ten thousand to be printed out.

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OK, so there we see it.

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Great.

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So now we have basically two actions that we can use to extract values out of the cell.

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And the next thing that I want to do before before heading to the next to the next bar, I just want

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to mention a small thing.

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A pie chart is all is not all is not just a development environment.

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It's also a learning tool if you know how to use it.

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OK, so Pyfrom can give you hints of what options can you use in your code and then really recommend

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you to do it.

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And the only way to do it is by experimenting.

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I personally studied a lot using by Charm's hints and we will see how to do it right now.

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So first of all, let's call out the dictionary.

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And just a few moments ago, when we did not get we seen here a pop up with lots of options.

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So all of these options are very valuable to use upon dictionaries.

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So why not using them?

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So let's try to use them.

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So first of all, we're already familiar with this guy with Pop.

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We apply it on lists in previous lectures and we in previous lectures when we use lists, we mentioned

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we mentioned here the index number.

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But as you recall in the previous video I mentioned that dictionary is an unordered a collection.

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So we can't apply index Salleh index here.

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This would be wrong.

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So what we want to do is to mention the key here and just going to do an experiment and put Sellery

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here.

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By the way, it doesn't matter if you put Equitation double quotation marks or just a single one like

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this, it's the same effect just as long as you don't do one of each kind like this, OK, as long of

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as long as both of them from the same kind, double or single.

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This is OK to pie chart.

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So let's put celery here and then let's try to print the new employee dictionary.

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And what I'm expecting to see is when once we're using Pop that we would like to the cell to be removed

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and we're expecting for all this to be removed.

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The key and the value.

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OK, so let's try to print it and see what happens.

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Yes.

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So as expected, the salary cell was completely deleted out of the list.

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Out of the dictionary.

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It's not here anymore.

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OK, so I just had the comments removed.

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Dictionary cell by using pop.

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And I'm just going to copy this one.

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And.

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Police youth here inside quotation marks.

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Yes.

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So this is it, this is what we have learned now that if we use dot pop, we can remove the cell from

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the dictionary.

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So it only by experimenting because I see the dictionary dot and I saw in the pop up lots of options

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over there.

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And why not using them?

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Why not trying to use them?

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And we can study lots of things by using and try and experimenting new things and I.

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Right.

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So it's a good it's highly recommended by me to do experiments and it can be very useful to study new

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things like that.

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So let's try to do a different thing.

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Let's call out the dictionary.

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And why do you think if I use the value or Keyes action, what will happen like that?

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So can I maybe guess what will happen?

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So is it logical to say that if I printed it would give me all of the keys of the dictionary?

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Am I right?

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That's very logical.

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So let's try to print it and see what happens first and then we'll put a comment afterwards.

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So it's printed.

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So indeed, as we just said, we will see all the keys printed out.

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OK, so print out all keys of the dictionary.

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So this is also a very powerful tool that we can extract all of the keys at once.

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Yes, so casting.

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Yeah, so that's great, and I'm just going to copy this one, because we have keys and we also have

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values, and it's really logical to understand that both of them doing the extraction in the same way,

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one on keys and one on values.

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So I'm just going to change the word values in all relevant places and try to print it.

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Yeah, and here we want to place values as such and try to print it, and also here we have printed

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out we have extracted all values out of the dictionary.

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All right.

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So this was very, very useful to just experiment.

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Just experiment.

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Do not be afraid to get some errors.

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The worst case scenario is you get an error and the best case scenario that you learn new things.

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And once you learn a new thing, you can use it forever.

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It gets gets in, your DNA gets in your mind, and then it's yours forever and you can use it for the

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wrong according to your requirements.

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So now, guys, I'm going to head over to the last part of the theory example part.

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And I'm just going to combine two topics together.

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As you recall, in our first lessons, we have studied what our variables.

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So I'm going to use variables and dictionaries together.

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And basically what I'm going to do is instead of hard coding the values and the keys inside the dictionary,

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I'm going to create a variable and place a variable instead, a hard coded value as such.

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Just put the variable inside and then I'll try to print it and see the value of the dictionary prints,

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the variable that I've put inside.

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So I'm just going to use a variable.

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And place it inside the dictionary.

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A dictionary cell.

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OK, so my variable will be job title and output developer here.

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And and I'm going to create a new.

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Dictionary.

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And port.

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Like job.

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Title.

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Yeah, and put job title, you know what, let's give it a different name, job title valued small,

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correct, more indicative.

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So that's just copy it and place it here.

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OK, and now let's just print it, print the new.

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Dictionary plus casting and new dictionary.

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All right, so what I'm expecting to get is to print out the list, but as you can recall, as you can

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see, I'm not using a hard coded values here.

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I'm just using a variable and placing it inside a dictionary.

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So it's printed.

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There you have it.

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We don't see anything.

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All right.

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So let's see what's wrong.

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Oh, obviously, we printed the old dictionary.

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New dictionary.

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Yep, so this work, yep, so we can see the new dictionary printed out and you can see how topics are

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gathering together.

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So now you can also use dictionaries together with variables.

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And all the same, you can also apply variables inside lists as well.

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So, like both topics are mixed, and as long as we go forward, they're all topics will be combined

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together and we can invent and we can create cool stuff using all the tools together.

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So this will be the final part of the theory basics regarding dictionaries.

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I will see you in the next video and we will practice at the dictionaries and that's about it.

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All right.

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Bye bye.