1
00:00:00,840 --> 00:00:08,490
Hello, friends, in this video, we shall see how we can build the you are dynamically in our last

2
00:00:08,490 --> 00:00:09,030
application

3
00:00:12,810 --> 00:00:13,800
for this purpose.

4
00:00:14,100 --> 00:00:18,780
The Flask API contains a function called as you are called for.

5
00:00:19,800 --> 00:00:24,550
It is a very useful function to construct the you are in a dynamic fashion.

6
00:00:25,710 --> 00:00:30,060
This function accepts certain arguments.

7
00:00:30,690 --> 00:00:38,310
One is the function for which you want to find out the you are ill and the other is a number of key

8
00:00:38,320 --> 00:00:38,550
words.

9
00:00:39,120 --> 00:00:43,230
One or more than one keyword arguments may be provided to it.

10
00:00:43,980 --> 00:00:48,960
So it accepts the name of the function as the first argument, which is mandatory or compulsory.

11
00:00:49,230 --> 00:00:58,590
And if it is needed, then certain keyword arguments may be provided, which may be used to form the

12
00:00:59,100 --> 00:01:00,240
you are in dynamically.

13
00:01:01,980 --> 00:01:08,590
It allows you to change the you are ill at one in one go without having to remember that you are.

14
00:01:08,970 --> 00:01:15,300
Otherwise you will not remember there that you are in here by just using the keyword arguments.

15
00:01:15,300 --> 00:01:18,640
You can form the you are in a dynamic manner.

16
00:01:20,430 --> 00:01:26,850
Another advantage of this you are in for the function is that you will be able to handle the escaping

17
00:01:27,360 --> 00:01:34,320
of some special characters, especially special characters with unique data.

18
00:01:34,800 --> 00:01:36,360
Very transparently can be.

19
00:01:36,360 --> 00:01:40,550
It can be done very transparently so that you don't have to.

20
00:01:40,590 --> 00:01:46,250
You don't have to as a developer, you don't have to deal with those Unicode characters.

21
00:01:46,950 --> 00:01:57,300
And another advantage of you are for function is that if your application is placed outside the outside

22
00:01:57,300 --> 00:02:04,150
of the root you are, then you are in function, will automatically do it for you.

23
00:02:04,530 --> 00:02:09,120
So all these are some of the advantages of this.

24
00:02:09,120 --> 00:02:10,010
You are in function.

25
00:02:10,680 --> 00:02:11,520
What we shall do.

26
00:02:11,850 --> 00:02:18,450
We shall write a small python script in which you are in for a function is used and let us see how the

27
00:02:18,450 --> 00:02:22,380
behaviour, our our output of the program is seen in front of us.

28
00:02:22,380 --> 00:02:24,900
So let us demonstrate the example in front of you.

29
00:02:25,770 --> 00:02:34,860
In this example, we shall see how to build the you are dynamically using the function called you are

30
00:02:35,000 --> 00:02:38,220
for which is defined in the flask model.

31
00:02:39,120 --> 00:02:47,970
You also need a function called redirect, the purpose of the redirect function is to redirect the browser

32
00:02:47,970 --> 00:02:50,220
from one you are ill to the other.

33
00:02:50,250 --> 00:02:53,640
You are one of the things that you are still to be.

34
00:02:54,700 --> 00:03:02,260
Redirected to ease, to be first from our first using the you are for function.

35
00:03:03,250 --> 00:03:08,560
So coming back to this court, what do we have in this program?

36
00:03:09,280 --> 00:03:14,920
First, of course, is this is the last application object that you have to create.

37
00:03:15,920 --> 00:03:25,990
Then we have to find a you are called a slash admin, and this you are is bound to.

38
00:03:27,490 --> 00:03:29,500
A view function Collette's Hello, Ermin.

39
00:03:30,870 --> 00:03:41,850
So if after the server is, you know, running, you give the URL as localhost 5000 slash admin, then

40
00:03:42,630 --> 00:03:45,340
on the browser you should get this message.

41
00:03:45,480 --> 00:03:46,320
Hello, admin.

42
00:03:47,200 --> 00:03:48,630
This is a fairly simple.

43
00:03:49,690 --> 00:03:53,850
Definition of if you are ill with the help of the root decorate.

44
00:03:55,750 --> 00:04:02,470
Similarly, there is another are, which is defined as guest, but in front of it there is a variable

45
00:04:02,830 --> 00:04:05,670
which is mentioned in the angler records.

46
00:04:06,370 --> 00:04:09,070
So as a result, what will happen if you.

47
00:04:10,150 --> 00:04:18,550
You the you are as local, almost 5000 guessed slash some other strings, let us say, and we're.

48
00:04:19,820 --> 00:04:21,590
So that Envir will be.

49
00:04:23,220 --> 00:04:29,850
Picked up as the value of this variable, which is mentioned in the angular brackets here, the name

50
00:04:29,850 --> 00:04:36,270
of the variable is guessed and that it will be passed as a keyword arguments to the.

51
00:04:37,870 --> 00:04:40,990
My view view function head August.

52
00:04:41,960 --> 00:04:45,170
So when this halo function hello, guest function is executer.

53
00:04:46,280 --> 00:04:48,150
On your brother, you should get a message.

54
00:04:48,240 --> 00:04:48,620
Hello.

55
00:04:49,920 --> 00:04:55,330
This is a placeholder percent as the value of this variable will be substituted here.

56
00:04:55,620 --> 00:04:56,360
So hello.

57
00:04:56,640 --> 00:04:59,220
And we'll as guest will be our.

58
00:05:00,700 --> 00:05:01,450
Expected of.

59
00:05:02,570 --> 00:05:05,000
Now, this is the straightforward way of.

60
00:05:06,030 --> 00:05:11,040
Calling a review function which is associated with the you.

61
00:05:12,120 --> 00:05:19,410
Now, what we are doing is we will be dynamically fetching the you are all associated with either Hello

62
00:05:19,410 --> 00:05:29,520
Ermin or hello, your guest, depending on what is the value of the name variable, which is mentioned

63
00:05:29,520 --> 00:05:30,490
in the third.

64
00:05:30,510 --> 00:05:30,870
You are.

65
00:05:31,110 --> 00:05:32,040
So we have a third.

66
00:05:32,040 --> 00:05:33,840
You are mentioned are defined.

67
00:05:35,330 --> 00:05:38,600
In this program, slash user slash name.

68
00:05:42,450 --> 00:05:44,150
In the browser, suppose?

69
00:05:45,580 --> 00:05:51,370
If the other one is local, lost 5000 users admin.

70
00:05:53,270 --> 00:05:59,830
OK, so the admin will be the value of this variable name that will be given to the map review function

71
00:05:59,960 --> 00:06:00,850
hello user.

72
00:06:01,640 --> 00:06:03,890
So the real value of the name will be admin.

73
00:06:04,070 --> 00:06:05,900
So this statement will be true.

74
00:06:07,170 --> 00:06:09,900
So therefore, this part will be executed.

75
00:06:10,140 --> 00:06:10,890
What does it do?

76
00:06:11,220 --> 00:06:14,550
It will feature the you are for hello admin function.

77
00:06:15,820 --> 00:06:22,300
Which, incidentally, is this and the map function is this, so therefore, hello, admin will be printed.

78
00:06:24,030 --> 00:06:32,820
But if, on the other hand, the knees localhost 5000 slash, you slash anvil, so the name variable

79
00:06:32,820 --> 00:06:39,770
will become will the argument to the Halo user function will become will.

80
00:06:39,960 --> 00:06:41,360
This condition will not be true.

81
00:06:41,640 --> 00:06:43,410
So the aspart will be executed.

82
00:06:43,980 --> 00:06:44,640
What does it do?

83
00:06:44,970 --> 00:06:48,000
It features that you are in for Hello Guest.

84
00:06:49,630 --> 00:06:56,230
An additional parameter to this hello, you you are Alvar function is another attribute guest is equal

85
00:06:56,230 --> 00:06:58,030
to name, in which case this is the real.

86
00:06:58,970 --> 00:07:06,230
So what happens, the associated the wall becomes this one to be the director you are will be this.

87
00:07:07,440 --> 00:07:14,940
And the associated function is, again, they saw the value of guest will be provided to this, your

88
00:07:15,030 --> 00:07:16,770
argument you will get hello?

89
00:07:17,850 --> 00:07:26,370
And we'll ask guests, so essentially what you are doing, you are selecting the you are dynamically

90
00:07:26,370 --> 00:07:28,860
with the help of the you for function.

91
00:07:29,690 --> 00:07:30,440
So this is the.

92
00:07:31,520 --> 00:07:37,790
You know, explanation of this call of this flask application, what we will do.

93
00:07:39,150 --> 00:07:41,550
We will execute this program.

94
00:07:42,550 --> 00:07:50,620
The server will start and then we will open a browser, give the Eurail, according to this.

95
00:07:51,610 --> 00:08:00,550
And then see that in first place, the Hello Amen will be displayed and then the execution of the hello

96
00:08:00,550 --> 00:08:02,820
guest function will be performed.

97
00:08:03,100 --> 00:08:09,550
So let us see through the Python script in which this entire program is written, is sealed as you are

98
00:08:09,580 --> 00:08:09,980
building.

99
00:08:09,980 --> 00:08:13,480
Not why I have executed that program.

100
00:08:13,490 --> 00:08:15,360
The server is running now.

101
00:08:15,370 --> 00:08:21,810
We will go to the browser and give the URL slash localhost 5000 slash.

102
00:08:23,100 --> 00:08:28,800
First, we shall see whether he just by mentioning admin, the result admin and.

103
00:08:29,960 --> 00:08:32,150
The Hello and Viola's guest.

104
00:08:33,430 --> 00:08:36,160
These outputs will come and then we'll see how the.

105
00:08:37,170 --> 00:08:43,650
Dynamic selection of fuel and redirection of the browser to the corresponding function takes place.

106
00:08:47,090 --> 00:08:53,060
So I open the browser and there you are, localhost 5000 admin, as you expected.

107
00:08:53,300 --> 00:08:54,860
Hello, admin will be printed.

108
00:08:56,370 --> 00:08:59,310
Then I assume you are as hello.

109
00:09:02,640 --> 00:09:03,300
Gerst.

110
00:09:04,700 --> 00:09:05,120
M.V..

111
00:09:06,230 --> 00:09:14,540
So this will become the variable part of the you are you want to the guest function and the output will

112
00:09:14,540 --> 00:09:16,480
be healthy and will as guest.

113
00:09:16,520 --> 00:09:19,190
This is also as for the expected lines.

114
00:09:19,820 --> 00:09:21,740
Now comes the part of the.

115
00:09:23,920 --> 00:09:27,410
Dynamic formation of you all.

116
00:09:27,640 --> 00:09:28,720
So if I have to.

117
00:09:30,100 --> 00:09:30,730
Do that.

118
00:09:32,540 --> 00:09:42,080
And then I write user admin, so this becomes the variable part will be picked up by the associated

119
00:09:42,080 --> 00:09:47,310
review function hello user admin name is equal to admin condition is true.

120
00:09:47,510 --> 00:09:48,410
So therefore, the.

121
00:09:50,020 --> 00:09:50,530
Hello.

122
00:09:51,630 --> 00:10:02,070
Admin output will be displayed as a result of the redirection towards the function associated with the

123
00:10:02,590 --> 00:10:03,330
tissue audit.

124
00:10:05,120 --> 00:10:07,310
OK, and then again.

125
00:10:10,040 --> 00:10:11,180
I will do another.

126
00:10:12,310 --> 00:10:20,230
You are redirection by saying user M.V. allow the condition will not be true, so the expert will be

127
00:10:20,230 --> 00:10:25,020
executed so it will be redirected towards the hello guest function.

128
00:10:26,530 --> 00:10:27,030
That's it.

129
00:10:27,970 --> 00:10:35,070
So there you see, the use of your will for function allows you to form the you are dynamically and

130
00:10:35,070 --> 00:10:35,320
the.

131
00:10:36,510 --> 00:10:41,430
Browser can be redirected towards any selected.

132
00:10:42,640 --> 00:10:43,390
View function.