WEBVTT 00:01.320 --> 00:07.160 Now that our program is completed, let's go and bring some change to this. 00:07.160 --> 00:11.200 Because right now, as you see, it is kind of messy, not really messy. 00:11.240 --> 00:14.920 It is good, but it's better to change it to functions. 00:14.960 --> 00:15.560 Okay. 00:15.600 --> 00:22.560 As you see here at this part, this block of code is going to change the Mac address okay. 00:22.600 --> 00:27.880 And this block of code is going to get the argument okay. 00:27.920 --> 00:30.200 So let's go and create two functions. 00:30.200 --> 00:33.240 One of them is for getting the argument from terminal. 00:33.240 --> 00:36.760 The next one is for changing the Mac address. 00:36.760 --> 00:40.560 So whenever we need it in other programming in other program files. 00:40.560 --> 00:47.160 So we it is better to access them from here or we just can use the function. 00:47.200 --> 00:48.080 Okay. 00:48.120 --> 00:51.760 So here I'm going to create a new function. 00:51.760 --> 00:55.880 Name it change Mac okay. 00:55.920 --> 01:03.800 So as you know it is asking for interface and new Mac. 01:06.000 --> 01:06.440 Okay. 01:07.000 --> 01:12.380 Now let's have this part into the Function. 01:12.420 --> 01:14.020 I'm going to add this. 01:14.020 --> 01:20.620 Use control X and then hit a tab here and then paste it right in here okay. 01:23.660 --> 01:24.020 Okay. 01:24.540 --> 01:28.980 Now we have it and it is complete this part okay. 01:28.980 --> 01:36.540 And here let's call it here it is change okay. 01:36.580 --> 01:37.420 Change Mac. 01:38.980 --> 01:44.020 And here we are going to give that which is interface. 01:46.220 --> 01:50.420 And new Mac address which is new Mac address okay. 01:50.820 --> 01:54.620 So right now we call it and I'm sure there is no problem. 01:55.020 --> 02:02.060 So also this part or this block of code is getting the argument okay. 02:02.100 --> 02:06.140 So for that again I'm going to come here and create another function. 02:06.140 --> 02:09.780 And I'm going to name it get arguments. 02:13.100 --> 02:13.540 Okay. 02:14.900 --> 02:20.380 And I think it is not asking for anything for from for input. 02:20.380 --> 02:25.880 Because all I knew thing is commands here so it doesn't need anything. 02:26.040 --> 02:28.120 Okay so let's control x. 02:28.160 --> 02:30.520 That and paste it here. 02:33.480 --> 02:34.800 Let's hit tab here. 02:35.520 --> 02:35.880 Okay. 02:36.440 --> 02:37.800 Now it is good. 02:38.680 --> 02:40.800 That is still here. 02:41.240 --> 02:43.320 We have the argument and option. 02:43.840 --> 02:46.200 That is not here. 02:46.240 --> 02:46.920 Okay. 02:46.960 --> 02:54.040 While we are using it right here it is not able to access it because it's inside this function. 02:54.080 --> 02:55.000 Okay. 02:55.000 --> 02:57.920 So here I'm going to remove this. 02:58.800 --> 03:03.320 And instead of this I'm going to return return this part. 03:03.360 --> 03:05.560 And here I can use it. 03:05.600 --> 03:06.240 Okay. 03:06.280 --> 03:08.440 Very easy. 03:08.480 --> 03:14.360 Now instead of giving interface and new Mac I am going to just use that. 03:14.360 --> 03:15.280 Like here. 03:15.280 --> 03:17.520 Right here is going to be options. 03:18.120 --> 03:20.280 And what was the next one. 03:20.360 --> 03:21.600 It was argument. 03:24.640 --> 03:25.520 Arguments. 03:26.520 --> 03:30.360 And it is equal to get argument. 03:30.400 --> 03:30.920 Okay. 03:30.960 --> 03:33.820 And it is not asking for anything as in. 03:34.460 --> 03:35.060 So. 03:35.100 --> 03:35.500 Okay. 03:36.220 --> 03:44.460 And here now instead of using interface and new Mac address, that is something we don't need because 03:44.460 --> 03:54.940 here now we can use options dot interface and options dot new Mac. 03:55.420 --> 03:55.820 Okay. 03:56.660 --> 04:02.700 So this is how we could change this in a better way. 04:02.740 --> 04:03.260 Okay. 04:03.300 --> 04:05.260 Now I think it is completed. 04:05.500 --> 04:09.660 Let's save it and go to change this. 04:10.780 --> 04:13.380 So now you know that the Mac address is 99. 04:13.540 --> 04:22.820 Let's clear the terminal and let's use this to change it back to five five. 04:22.860 --> 04:23.260 Okay. 04:23.780 --> 04:24.180 Let's. 04:26.700 --> 04:27.500 Use ifconfig. 04:27.540 --> 04:33.700 Now you see it is five five with no changes with no problem. 04:33.740 --> 04:34.140 Okay. 04:34.460 --> 04:38.300 So now I think the program is looking good. 04:39.460 --> 04:42.700 It is better and almost complete. 04:42.940 --> 04:45.220 Thanks for watching and I will see you in the next lecture.