1
00:00:00,009 --> 00:00:00,829
Welcome back. So if you

2
00:00:00,980 --> 00:00:03,710
listen, we talked about dictionaries, but now

3
00:00:03,869 --> 00:00:08,000
we're going to go a step further to talk about nested dictionaries.

4
00:00:08,010 --> 00:00:11,270
So basically dictionary inside of another dictionary.

5
00:00:11,710 --> 00:00:15,470
So far, we've been dealing with one single user info.

6
00:00:15,579 --> 00:00:20,229
But what if we had multiple users, right? How can we create this? So

7
00:00:20,610 --> 00:00:22,229
what I'm gonna do right here is let us

8
00:00:22,239 --> 00:00:25,670
change the name from user info to user credentials.

9
00:00:25,680 --> 00:00:26,219
All right,

10
00:00:26,440 --> 00:00:28,629
this is going to be the new name for our dictionary.

11
00:00:29,329 --> 00:00:31,510
And now curly braces,

12
00:00:32,359 --> 00:00:36,208
we can now add the very first nested dictionary

13
00:00:36,418 --> 00:00:39,028
that will contain the information for

14
00:00:39,238 --> 00:00:40,339
admin.

15
00:00:40,508 --> 00:00:41,019
So

16
00:00:41,770 --> 00:00:44,020
gonna come right here, type in admin.

17
00:00:44,270 --> 00:00:45,990
That will be our first user.

18
00:00:46,720 --> 00:00:48,490
And now the credentials,

19
00:00:48,720 --> 00:00:51,419
curly braces. Let's go with the password

20
00:00:52,900 --> 00:00:54,360
password in here

21
00:00:54,849 --> 00:00:55,430
and then

22
00:00:57,040 --> 00:00:57,819
call on

23
00:00:58,849 --> 00:01:02,349
and then we can go with uh admin

24
00:01:03,799 --> 00:01:06,110
123.

25
00:01:06,230 --> 00:01:06,730
All right.

26
00:01:06,940 --> 00:01:11,349
So the first user here admin, the password is going to be admin 123

27
00:01:11,459 --> 00:01:13,330
and we can add another

28
00:01:14,220 --> 00:01:17,239
credential, which would be the last log in.

29
00:01:18,629 --> 00:01:19,959
So last login,

30
00:01:21,449 --> 00:01:24,430
let's have this one in our coats,

31
00:01:25,260 --> 00:01:26,879
last log in

32
00:01:28,169 --> 00:01:29,309
and now colon,

33
00:01:30,069 --> 00:01:33,660
let's add the date So let's say something like 20

34
00:01:34,139 --> 00:01:39,209
24-10 dash 19.

35
00:01:39,629 --> 00:01:40,239
All right,

36
00:01:40,370 --> 00:01:45,620
just as an example, there is a bit of an error right here. Let me see.

37
00:01:45,629 --> 00:01:48,769
What exactly am I doing wrong?

38
00:01:49,389 --> 00:01:49,769
Ah

39
00:01:50,180 --> 00:01:53,250
Over here with password, the column should be outside.

40
00:01:54,069 --> 00:01:55,449
I made a mistake there.

41
00:01:55,580 --> 00:01:58,239
Ok. Much better. So this is the first and

42
00:01:58,419 --> 00:02:00,290
the dictionary we have admin

43
00:02:00,639 --> 00:02:04,419
that has the key value pairs, it has the key password

44
00:02:04,529 --> 00:02:06,809
and the developer password here is going to be admin 123.

45
00:02:06,919 --> 00:02:09,070
And then the other key here is going to be last login.

46
00:02:09,210 --> 00:02:14,199
And the value is of course 2024 1019, but we can add another dictionary.

47
00:02:14,210 --> 00:02:15,490
So I'm gonna say comma

48
00:02:16,130 --> 00:02:20,449
and now we can add another user, let's call this person user one.

49
00:02:21,029 --> 00:02:24,559
And I'm just gonna let Raley do the rest fill out

50
00:02:24,809 --> 00:02:26,850
all the information in there

51
00:02:28,119 --> 00:02:31,770
and there you go. So the password is going to be user 1123.

52
00:02:31,779 --> 00:02:36,710
And then last login is also now let's change the date here to something else. So

53
00:02:36,940 --> 00:02:39,330
let's go with 06

54
00:02:40,070 --> 00:02:41,360
and then maybe

55
00:02:41,539 --> 00:02:41,550
a

56
00:02:42,639 --> 00:02:45,190
14, all right, just for variety.

57
00:02:45,509 --> 00:02:46,199
And there it is.

58
00:02:46,210 --> 00:02:47,610
So this right here is what we refer to

59
00:02:47,619 --> 00:02:53,710
as a nested dictionary dictionaries inside of another dictionary.

60
00:02:53,789 --> 00:02:57,309
And of course, we can access the information pretty straightforward. So

61
00:02:57,470 --> 00:03:01,300
for example, if I wanted to print out the password

62
00:03:01,410 --> 00:03:03,460
for the admin,

63
00:03:03,729 --> 00:03:06,410
how can I do this? I can simply say print

64
00:03:06,919 --> 00:03:09,940
and now in brackets, I'm going to say user

65
00:03:10,600 --> 00:03:12,580
underscore credentials.

66
00:03:12,919 --> 00:03:14,179
Ok. And now

67
00:03:14,339 --> 00:03:15,820
the regular brackets

68
00:03:16,809 --> 00:03:20,369
and inside double codes, I'm gonna say admin.

69
00:03:20,970 --> 00:03:21,649
Ok.

70
00:03:21,899 --> 00:03:25,130
And now we want to print out what the password for the admin. So

71
00:03:25,369 --> 00:03:26,570
brackets again,

72
00:03:27,710 --> 00:03:28,649
let's add

73
00:03:29,000 --> 00:03:30,050
password

74
00:03:31,440 --> 00:03:33,240
and there it is.

75
00:03:33,250 --> 00:03:37,639
So if I run the program right now, you can see it says admin 123 because we're saying,

76
00:03:37,649 --> 00:03:40,899
hey, print out from the user credentials dictionary,

77
00:03:41,570 --> 00:03:43,350
we want you to print out

78
00:03:43,720 --> 00:03:45,350
the value

79
00:03:45,720 --> 00:03:51,470
of the key password belonging to the user admin.

80
00:03:51,779 --> 00:03:54,889
And that's why we have admin 123

81
00:03:55,089 --> 00:03:57,270
or I could say, OK,

82
00:03:57,630 --> 00:03:58,699
print

83
00:03:59,490 --> 00:04:01,190
and backet user

84
00:04:02,020 --> 00:04:07,559
credentials. And let's print out the last login for user one.

85
00:04:07,570 --> 00:04:09,919
How are we going to do this again? Very straightforward.

86
00:04:10,199 --> 00:04:12,559
I'm simply going to come in here, say user one

87
00:04:13,289 --> 00:04:14,029
and now

88
00:04:14,289 --> 00:04:21,350
new brackets and then simply put in the last login key last underscore

89
00:04:21,750 --> 00:04:22,470
login

90
00:04:24,290 --> 00:04:26,390
and there you go. So I run

91
00:04:26,760 --> 00:04:28,369
and there you go 2024

92
00:04:28,529 --> 00:04:30,869
06 14.

93
00:04:31,029 --> 00:04:35,630
So this right here is an example of nested dictionaries. And

94
00:04:35,779 --> 00:04:38,859
this can be particularly useful if you're trying to create

95
00:04:39,140 --> 00:04:42,119
functions or programs for firewalls or a

96
00:04:42,399 --> 00:04:46,079
password checking tool or a tool that check user credentials, things like that,

97
00:04:46,089 --> 00:04:46,420
right?

98
00:04:46,579 --> 00:04:50,529
You can use nested dictionaries for those kinds of programs.

99
00:04:50,630 --> 00:04:53,429
So thank you for watching and of course, I will see you in the next class