WEBVTT 00:01.360 --> 00:05.880 Now to get this result. 00:05.920 --> 00:06.240 Okay. 00:06.280 --> 00:12.600 Or this Mac address from output which is stored in ifconfig result. 00:12.640 --> 00:12.920 Okay. 00:12.960 --> 00:17.440 We are going to use a module called regex or re. 00:17.480 --> 00:19.480 So let's import that okay. 00:19.520 --> 00:20.880 Import re. 00:21.400 --> 00:25.120 So okay so now we have imported this. 00:25.120 --> 00:27.000 Maybe it is not already installed. 00:27.040 --> 00:27.320 Okay. 00:27.360 --> 00:37.440 So if you want to install this so let me go to here use pip install re. 00:37.680 --> 00:39.760 So this will be installed okay. 00:39.800 --> 00:41.520 If we have internet connection. 00:41.720 --> 00:43.040 So it will be installed. 00:43.040 --> 00:45.480 If we don't have it no problem. 00:45.600 --> 00:49.960 Let we will we will install that okay. 00:50.000 --> 00:53.880 So as you see it is it has another color okay. 00:53.920 --> 00:54.680 Change color. 00:54.680 --> 00:58.640 So maybe it is not installed okay. 00:58.640 --> 01:00.320 So we're going to use from that. 01:00.320 --> 01:04.120 And that Re has a function that is called search. 01:04.720 --> 01:05.360 Very easy. 01:05.400 --> 01:05.720 Okay. 01:07.720 --> 01:12.080 Now let's use that re dot search. 01:12.640 --> 01:13.040 Okay. 01:13.520 --> 01:16.520 Here we are going to provide the regex. 01:16.560 --> 01:16.960 Okay. 01:17.280 --> 01:24.520 So in here I am going to give the regex pattern that I just created here. 01:24.960 --> 01:26.520 Let me copy this. 01:29.520 --> 01:32.240 And go back to curly. 01:32.280 --> 01:35.480 Here I'm going to paste this. 01:35.600 --> 01:36.000 Okay. 01:36.280 --> 01:39.560 So this is the first argument that search accepts. 01:39.560 --> 01:46.400 And the next one is uh the resource or where do you want to search this. 01:46.440 --> 01:46.760 Okay. 01:46.800 --> 01:51.800 We are going to search this pattern into this variable which is if config result. 01:51.920 --> 01:52.840 Very good. 01:52.880 --> 01:56.040 So you need to give the if config result right here. 01:56.640 --> 01:57.040 Okay. 01:57.280 --> 02:00.280 If config result. 02:01.280 --> 02:02.720 So there we go. 02:02.760 --> 02:04.040 Now we have it here. 02:04.040 --> 02:06.960 And it is better to store this into a variable. 02:07.000 --> 02:07.240 Okay. 02:07.280 --> 02:08.560 So later we can use it. 02:09.160 --> 02:12.640 It is going to be Mac address search result. 02:13.080 --> 02:14.480 So let's use Mac. 02:17.760 --> 02:18.400 Address. 02:20.600 --> 02:22.640 Search result. 02:22.840 --> 02:25.480 It is equal to something like this. 02:26.080 --> 02:26.680 And. 02:28.800 --> 02:29.080 Okay. 02:29.120 --> 02:31.560 Now I think it is installed. 02:36.000 --> 02:40.080 Um, okay, I think I don't have internet connection. 02:40.080 --> 02:40.600 No problem. 02:40.600 --> 02:41.680 I will solve that. 02:41.720 --> 02:48.440 Okay, so now we have installed the we have installed this into this variable. 02:48.440 --> 02:48.840 Okay. 02:50.160 --> 02:55.160 So the next part is to just print this very easy okay. 02:55.200 --> 02:57.480 So I just use print method here. 02:57.720 --> 02:58.120 Okay. 02:58.840 --> 03:02.400 And Mac address search result. 03:02.680 --> 03:06.400 And sometimes it return multiple values okay. 03:06.440 --> 03:12.440 For example right now here it is only returning one thing and that is the Mac address. 03:12.920 --> 03:15.240 But sometimes it is returning multiple things. 03:15.240 --> 03:19.520 So we need to specify that by using another function that is called group. 03:19.600 --> 03:21.840 And here we give the zero. 03:21.840 --> 03:25.160 So it will give you the first one or the specified by one. 03:25.160 --> 03:29.840 So it will give you the next one which is the second one okay. 03:30.920 --> 03:35.800 So we have this and let me go to Python interpreter. 03:36.120 --> 03:37.360 See if it is installed. 03:39.240 --> 03:40.840 Import re. 03:41.480 --> 03:41.640 Okay. 03:41.680 --> 03:43.040 As you see it gives me no error. 03:43.040 --> 03:44.600 That means it is installed. 03:44.600 --> 03:45.280 Very good. 03:45.840 --> 03:48.120 And is it okay. 03:48.160 --> 03:51.040 So what is the next thing we need to do right now. 03:51.040 --> 03:52.360 If I execute this. 03:52.480 --> 03:58.200 So it will give me no error and it will be executed successfully. 03:58.200 --> 04:01.800 So let's see that here. 04:02.800 --> 04:07.800 So right now I'm trying to change the Mac address for it is zero. 04:07.800 --> 04:13.800 And hitting enter providing the password which is curly and hitting enter. 04:14.400 --> 04:14.640 So. 04:16.680 --> 04:17.120 Okay. 04:18.000 --> 04:26.200 And here you see it gives me a result says cannot use string pattern on byte like object. 04:26.520 --> 04:27.640 Okay no problem. 04:27.920 --> 04:29.960 As you see here it is string. 04:29.960 --> 04:32.520 And it is saying that we cannot use this okay. 04:33.840 --> 04:34.760 On object. 04:34.960 --> 04:37.520 So it is better to change it to something else. 04:37.880 --> 04:39.600 I will be back okay. 04:46.000 --> 04:46.480 Okay. 04:46.480 --> 04:49.280 We have re here which is going to be an object. 04:49.440 --> 04:50.440 And also. 04:54.680 --> 04:56.120 Let's see the error again. 04:56.240 --> 04:58.040 What is it giving me. 04:58.400 --> 05:00.440 It is saying return this one okay. 05:00.600 --> 05:02.960 And also dot search. 05:03.480 --> 05:04.200 Oh my God. 05:04.240 --> 05:07.040 This search method must have string. 05:07.080 --> 05:07.520 Okay. 05:07.880 --> 05:12.240 Anything that it returns, anything you give to this must be string. 05:12.760 --> 05:14.970 So here as you see the first one. 05:14.970 --> 05:17.850 It is a string and this ifconfig I think it is not a string. 05:17.890 --> 05:24.610 Okay, so let's provide this as a string and change it to string str. 05:32.970 --> 05:42.210 Now let me save this and let's go back to our terminal here Re-execute this and hit enter. 05:42.570 --> 05:42.930 Okay. 05:43.370 --> 05:44.970 Now as you see here okay. 05:45.010 --> 05:48.770 The first one, it is giving me the result okay. 05:48.810 --> 05:51.770 The result for eth0 as you see that here. 05:52.330 --> 05:59.970 And then at the end it is printing only the Mac address that we are telling this to print that here. 06:00.930 --> 06:01.250 Okay. 06:01.610 --> 06:05.970 What if I try to change this for not. 06:06.010 --> 06:08.090 It is zero for low. 06:08.130 --> 06:09.770 What will be happening? 06:10.010 --> 06:10.570 Let's see. 06:12.850 --> 06:17.290 Now when I hit enter, you see that it is printing the low result here. 06:17.450 --> 06:17.890 Okay. 06:18.450 --> 06:29.450 And it is giving me that the interface is low, but but, uh, again, it is giving me this result. 06:29.490 --> 06:29.730 Why? 06:29.770 --> 06:34.850 Because the low doesn't have any Mac address, so we need to handle that here. 06:34.890 --> 06:35.610 Okay. 06:35.650 --> 06:40.490 After printing or before printing that we need to handle that using decision making. 06:40.730 --> 06:45.690 And you know how to use decision making that is using by using if and else. 06:45.930 --> 06:52.290 So here I'm going to use if Mac address source result. 06:52.650 --> 06:59.690 If it returns something true then we will be printing this one okay. 06:59.730 --> 07:01.170 In else part okay. 07:01.210 --> 07:01.850 In else part. 07:01.850 --> 07:02.690 Let's print. 07:03.090 --> 07:06.490 Could not read Mac address or something like that okay. 07:06.530 --> 07:10.090 So use else and here print that. 07:15.490 --> 07:17.170 Okay. 07:17.210 --> 07:18.570 Here just give. 07:22.650 --> 07:23.410 Uh, okay. 07:24.810 --> 07:30.570 Could not read Mac address. 07:33.290 --> 07:36.970 Now I'm going to save this and let's come back to terminal. 07:37.610 --> 07:39.130 Let's use clear. 07:42.450 --> 07:42.930 Image. 07:49.010 --> 07:49.330 Okay. 07:49.330 --> 07:51.490 Right now I'm trying to change it for lo. 07:52.130 --> 07:56.450 And you see that it is giving me could not read Mac address. 07:56.490 --> 07:56.890 Okay. 07:57.650 --> 08:04.050 And if I try to change it for eth0 that is here and hit enter. 08:04.050 --> 08:06.570 You see it is giving me the Mac address. 08:06.570 --> 08:11.330 So here we are able to read or capture the Mac address from this output. 08:11.370 --> 08:11.610 Okay. 08:11.650 --> 08:15.210 This is the Mac address for this interface. 08:15.210 --> 08:16.810 And we are handling it. 08:16.810 --> 08:17.730 We just handled it. 08:17.770 --> 08:18.490 Okay. 08:18.530 --> 08:23.130 So let's go and see how we can improve this in the next lecture.