1 00:00:00,780 --> 00:00:06,600 Hello everybody and welcome to our first project where we are going to quote our own port scanner using 2 00:00:06,600 --> 00:00:08,160 Python 3. 3 00:00:08,280 --> 00:00:12,720 So in the previous section we introduced herself to clinics were installed by charm. 4 00:00:12,810 --> 00:00:17,420 And now we are ready to start writing our code before we start. 5 00:00:17,580 --> 00:00:20,900 Let's first explain what is the purpose of a port scanner. 6 00:00:20,970 --> 00:00:25,090 What it will do and how are we going to create it. 7 00:00:25,090 --> 00:00:31,090 Well first of all our port scanner is a program that allows you to scan target machine and discover 8 00:00:31,180 --> 00:00:34,770 whether it has some open or closed ports. 9 00:00:34,870 --> 00:00:39,900 For example we all know that the port 80 is used in order to serve HDP. 10 00:00:39,970 --> 00:00:46,740 And in order to serve a website page How would you actually discover whether port data is open without 11 00:00:46,740 --> 00:00:48,610 visiting that page. 12 00:00:48,630 --> 00:00:55,170 Well using our port scanner we can see whether we can connect to that port data or whether we cannot 13 00:00:55,260 --> 00:00:56,430 if we can't connect. 14 00:00:56,430 --> 00:01:00,590 That means that the port is open and it is most likely hosting up a page there. 15 00:01:00,630 --> 00:01:04,200 And if we cannot connect that means that the port is closed. 16 00:01:04,200 --> 00:01:05,910 Simple as that. 17 00:01:05,910 --> 00:01:10,800 So that will be the base line and the base part of our program. 18 00:01:10,820 --> 00:01:17,830 Now let's open a new project and to do that we can go right here on file and then new project here we 19 00:01:17,830 --> 00:01:24,940 can call it port scanner click on Create it will ask you whether we want to open the new project in 20 00:01:24,940 --> 00:01:26,770 this window or in another window. 21 00:01:27,070 --> 00:01:30,740 I will simply just select this window right here. 22 00:01:30,820 --> 00:01:36,270 It will create the virtual environment for this project and then we can start coding. 23 00:01:36,430 --> 00:01:45,650 Now here it is the port scanner we will click on new and then python file and we will call it port scanner. 24 00:01:45,650 --> 00:01:46,440 Don't be white. 25 00:01:47,030 --> 00:01:47,780 OK. 26 00:01:48,310 --> 00:01:50,530 Byte file we created it. 27 00:01:50,530 --> 00:01:58,640 Let me just enlarge a little bit more the font size so once again to the editor font and right here 28 00:01:58,670 --> 00:01:59,600 let's go. 29 00:01:59,600 --> 00:02:03,740 Twenty four apply and now we are ready to go. 30 00:02:03,740 --> 00:02:07,930 Now for this project we're going to meet two different Python libraries. 31 00:02:07,940 --> 00:02:10,730 We're going to need to import the socket library. 32 00:02:11,900 --> 00:02:18,430 And we're also going to need to import a library called IP y. 33 00:02:18,500 --> 00:02:24,600 And we're going to port it like this from IP y import IP. 34 00:02:25,470 --> 00:02:33,070 Now right the way you might notice that the IP y and IP are both red underlined. 35 00:02:33,090 --> 00:02:39,980 This means that the PI charm cannot recognize this library and cannot find it so before we actually 36 00:02:39,980 --> 00:02:43,790 start using it we need to download it first. 37 00:02:43,790 --> 00:02:46,220 Now there are a few ways you can actually download it. 38 00:02:46,220 --> 00:02:53,720 You can download it using a regular terminal which we are going to do as a first try right here so I 39 00:02:53,720 --> 00:02:58,930 will just put it like this so we can see everything. 40 00:02:59,110 --> 00:03:05,840 Now in order to install a desired library using the terminal you have to use a command called bip 3 41 00:03:05,940 --> 00:03:12,340 install now pick three is a part of Python 3 and it is used to actually install Python free libraries 42 00:03:12,640 --> 00:03:16,150 that are missing and that you need in order to run your program. 43 00:03:16,810 --> 00:03:17,310 OK. 44 00:03:17,500 --> 00:03:23,320 Now if you're using a new clinics you most likely won't have three installed and in order to install 45 00:03:23,320 --> 00:03:31,420 it you simply just typed and installed Python three dash Pip press your enter and it will install it 46 00:03:31,510 --> 00:03:32,310 for you. 47 00:03:32,380 --> 00:03:36,690 For me it has already been installed so we can continue right away. 48 00:03:36,760 --> 00:03:42,490 Let me clear the screen and large this a little bit just in case you cannot see what I am typing. 49 00:03:44,020 --> 00:03:49,980 And let's get the library that we're missing so be three installed IP white. 50 00:03:50,140 --> 00:03:51,100 Press your enter 51 00:03:55,200 --> 00:03:59,280 and it will say requirement already set this flight. 52 00:03:59,290 --> 00:04:05,130 Now this might seem confusing because two minutes ago I just told you that we are missing this library 53 00:04:05,130 --> 00:04:07,000 that we cannot find it. 54 00:04:07,260 --> 00:04:12,600 And here inside of a terminal it says that the requirement has already been satisfied and that we already 55 00:04:12,600 --> 00:04:14,710 have this library at this location. 56 00:04:15,840 --> 00:04:21,450 Well that is another part of the pie charm that you need to understand by charm simply creates a virtual 57 00:04:21,450 --> 00:04:24,600 environment every time you create a new project. 58 00:04:24,600 --> 00:04:30,480 That means that the library that you have installed inside of your clinics doesn't necessarily have 59 00:04:30,480 --> 00:04:33,430 to be installed inside of your pie chart program. 60 00:04:33,450 --> 00:04:39,420 Therefore this IP why library has not been installed inside of this virtual environment. 61 00:04:39,420 --> 00:04:40,770 So where can we install it. 62 00:04:40,950 --> 00:04:48,150 Well you can go here on terminal and you will see right away that before the route Kelly and then the 63 00:04:48,240 --> 00:04:54,520 actual directory we have this V and V inside the brackets which stands for virtual environment. 64 00:04:54,540 --> 00:05:01,620 So right here if we type the same command which is people installed and then IP Why press your enter 65 00:05:02,490 --> 00:05:07,650 you can see that right now it is successfully downloading it and it has downloaded it inside of our 66 00:05:07,650 --> 00:05:10,000 virtual environment right now. 67 00:05:10,080 --> 00:05:15,240 If we lower this go right here you can see that this is no longer red underlined. 68 00:05:15,240 --> 00:05:18,660 And now we have both of our libraries ready to use. 69 00:05:18,660 --> 00:05:23,790 So I just wanted to show you that because it is really important and we will be switching between libraries 70 00:05:23,790 --> 00:05:25,390 throughout the entire course. 71 00:05:25,410 --> 00:05:29,280 So it is important for you to understand the meaning of a virtual environment. 72 00:05:29,280 --> 00:05:34,620 Therefore once you next time try to install a desired library that is missing from Pine charm don't 73 00:05:34,620 --> 00:05:37,050 use calendar next terminal like this. 74 00:05:37,050 --> 00:05:41,820 You simply just go down here and inside of this PI term project you can install the desired library 75 00:05:42,030 --> 00:05:44,370 inside of the virtual environment. 76 00:05:44,370 --> 00:05:49,700 So now the port important the design libraries in the next video we can start finally coding our ports 77 00:05:49,710 --> 00:05:52,080 can see you there by.