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Let's talk about dictionaries and just like with lists,

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you can modify, you can add remove elements in your dictionaries.

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However, the core difference between your lists and dictionaries is that

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unlike in your list, where you have individual elements or

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values or items

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in your dictionary, we're going to have or refer to as a key value pair. So

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as an example, I can have a dictionary called user info

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and now equals

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and I'm going to now use the curly braces. OK?

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We typically use the curly braces for dictionaries.

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So in here,

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I can have information like the username,

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which would be admin.

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So right here,

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username is going to be the key. While admin is going to be the value of the key,

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we can also have a password.

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OK?

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And let's say the password here is uh let me in just as an example

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and we could even have another one like let's say last

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login.

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OK. Last login

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colon

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and I can have a date, let's say 20 24-10 dash 22

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just as an example. All right.

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So do note that whenever you're adding your key value pairs in your dictionary.

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At the end of each line, you will have the comma.

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But then for the very last key value pair, there is no need to add the comma at the end.

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All right. So just take note of that. So

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this is what we refer to as a dictionary.

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All right, we have our key value pairs,

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username. The value is admin we have the key password.

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The value is let me in and of course,

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we have the key last login and then we have the date there as the value.

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So from here,

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I could decide to print out the information I could come down here

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and then say print.

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And now if I wanted to print, let's say the user name,

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I will first start by saying user underscore info.

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And now the regular brackets

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in here,

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I would simply

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say user name

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and that's it.

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So now if I was to run, you can see admin

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has been provided. So

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this is how you can print out the values

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all the keys in your dictionary,

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you simply state the key whose value you want to print and

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the program will do the rest.

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So

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now just like I said, with dictionaries, you can easily add or modify

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the elements in your dictionary. So for example,

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if I wanted to add some new information, like let's say the email of the user,

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all I would need to do right now is I can come down here

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and simply say user underscore info,

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ok? And now I will have the regular brackets

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and now I'll simply add the key here, which is going to be email

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and then very simply,

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I'm just gonna say equals

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and now I can add the email address right there. So let's just say admin at

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lab cyber.com.

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Alright? Just as an example, right?

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So if I was to come down in here right now and print

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the user info,

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let me just remove

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the key there. So we want to print out all the user information in here.

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I run the program

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and there it is, it's going to print out everything. So username is admin.

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The password is let me in the last login is this date and then the email ID is admin

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at

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lab cyber.com. We could also update,

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right. We could also update the

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information in our dictionary.

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So once again as an example,

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if I wanted to update, let's say the password, right?

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So I can say user underscore info.

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And now in brackets,

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of course, the key here is going to be password, right? So password

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and now I need to provide the new password.

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So let's call it sword fish,

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so fish.

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And

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there it is. If I run my program

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now, you can see that the password has

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changed to SWD fish. So

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just like with your list, you can

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add new key value pairs to your dictionary.

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You can also modify the values of existing keys.

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Also just like with lists, we do have a variety of methods

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that we can actually apply on to our

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dictionary.

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So the very first one here I want to talk about here is going to be the get method

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which will retrieve the value associated with a key.

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So

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for example,

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let me remove all this information in here. All right,

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if I wanted to print the user info

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or when I get the user name,

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the value of the key user name,

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all I need to do right here is I can say print user.info

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and then dot gets.

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All right. And now in brackets again,

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I will now add the key which is username.

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So this right here

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should print out the user name. If I run

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there, it is admin.

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So just like with your list that we, you know, we used a pen copy and so on,

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we have the exact same methods also for dictionary and get right here is one of them.

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Another method is going to be the keys where you can simply print out

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all the keys that we have in the dictionary. So let me remove

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all the information in here. So if I run

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there you go, we have all the keys which are username, password and last log in,

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we also have the opposite which would be values.

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So instead of keys, I'm going to change this one over here to values. And if I run.

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Now we're going to have all the values listed

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in the output. Now, we could also create a loop that will go through our dictionary.

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And how can we do this? Well,

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we can use the for loop because we have a dictionary.

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Remember that the four loops work well with lists, dictionaries and so on.

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So I'm gonna say four

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and now I'll have to say key.

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OK. So for key

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and then comma value

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in

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and now user underscore

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info

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and we have to add

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another method called items,

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items and now brackets colon.

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And there it is,

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this is how you would create your loop that will run through your dictionary.

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So it's gonna say four key comma value and then in

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the name of the dictionary and then you're gonna

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add the items method to it.

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And now all we have to do from here

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is to simply print out

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the

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information.

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So I'm going to say print

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and let's use the F string. So our

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regular brackets first

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and now the F string now

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coats

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curly

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braces to hold and display the key

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and I will have a colon.

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And now the other collibra is to hold what to hold the

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value.

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And now if I run

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there you go,

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username, admin password, let me in. And of course, the last login date right there.

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So you can also use loops to run through your dictionaries, your lists and so on.

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So that's it for dictionaries.

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Join me in the next video where we'll now take a look at what we refer to as nested

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dictionaries. I will see you then.