WEBVTT 00:00.610 --> 00:04.720 Sometimes you will want to use the value of an item after you remove it from a list. 00:05.230 --> 00:12.910 For example, you might want to get the A and B position of an alien that was just shot down so you 00:12.910 --> 00:15.460 can draw an explosion at that position. 00:15.460 --> 00:21.370 So in a web application, you might want to remove a user from a list of active members and then add 00:21.370 --> 00:23.800 that user to a list of inactive members. 00:24.770 --> 00:34.940 So the Pope method removes the last item in a list, but it lets you work with that item after removing 00:34.940 --> 00:35.210 it. 00:35.210 --> 00:41.870 So the term pope comes from thinking of a list as a stack of items and popping one of the item off the 00:41.870 --> 00:43.250 top of the stack. 00:43.250 --> 00:48.200 So in this analogy, the top of stack corresponds to the end of the list. 00:48.200 --> 00:50.750 So let's pop a pop. 00:52.690 --> 00:55.870 Let's actually use the car models right now. 00:55.870 --> 00:57.400 Let's use the car models. 00:57.400 --> 00:58.960 Let's delete all of this. 00:58.990 --> 01:04.180 We will create the car models, so car models here. 01:04.180 --> 01:08.860 So we will make the BMW Mercedes. 01:12.160 --> 01:13.270 So Toyota. 01:16.070 --> 01:17.950 And Suzuki. 01:17.960 --> 01:18.440 Right? 01:21.720 --> 01:31.710 After that, we will print our car models, and after that we will pop, pop car models here. 01:31.980 --> 01:32.700 Pop. 01:35.640 --> 01:36.540 Models. 01:37.140 --> 01:41.320 And here we will add the car models that pop. 01:42.410 --> 01:45.860 So after that, we will print the car models. 01:49.880 --> 01:50.840 Car models. 01:50.840 --> 01:54.980 And after that, we will print the pop car models as well. 01:58.990 --> 01:59.470 That's it. 01:59.860 --> 02:01.300 Now let's run the code. 02:01.570 --> 02:03.160 And here. 02:03.610 --> 02:09.700 So we start by defining and printing the list of car models. 02:09.880 --> 02:12.710 Then we pop a value from the list. 02:12.730 --> 02:14.830 Let's actually connect them. 02:14.830 --> 02:16.630 So this is the first. 02:17.080 --> 02:18.280 So this is the. 02:18.280 --> 02:19.120 I'm sorry. 02:19.360 --> 02:20.890 Let's let me fix that. 02:20.890 --> 02:25.990 So this is the first code and this is the first code here. 02:27.520 --> 02:29.380 This is the second print statement. 02:31.090 --> 02:33.220 This is the second print statement here. 02:34.680 --> 02:35.910 And this is the third. 02:37.190 --> 02:40.160 This is the third print statement. 02:40.840 --> 02:48.400 And here we start by defining and printing the list of car models. 02:48.490 --> 02:55.320 And after that, then we pop a value from the list with this command. 02:55.330 --> 02:59.770 Here we pop a value from the list. 02:59.800 --> 03:00.730 That's it. 03:02.310 --> 03:05.730 Uh, with, uh, with this pop comment here. 03:06.000 --> 03:06.780 Right. 03:06.780 --> 03:08.460 And after that. 03:10.310 --> 03:10.910 So. 03:12.170 --> 03:14.690 And assign that value to the variable. 03:15.470 --> 03:22.070 So we are assigning this port here to this newly created port car models variable. 03:22.190 --> 03:25.850 And then we print the port variable. 03:25.910 --> 03:32.360 So firstly, we print a list to show that the value has been removed from the list with this. 03:33.210 --> 03:36.600 Uh, with this line of code here. 03:36.600 --> 03:38.130 And after that. 03:38.130 --> 03:40.500 After that, we print the list. 03:41.100 --> 03:44.340 We print the popped value here. 03:44.370 --> 03:46.110 This is the popped value here. 03:46.860 --> 03:49.140 Then we print the popped value here. 03:51.680 --> 03:52.550 That's it. 03:54.600 --> 03:59.370 This is the value that has been removed from the list. 04:00.610 --> 04:01.600 Value. 04:03.620 --> 04:05.390 Value removed. 04:06.530 --> 04:07.370 Remove. 04:08.120 --> 04:09.800 So in this case. 04:10.710 --> 04:17.370 This popped car models is not list so not. 04:18.140 --> 04:19.430 List, right? 04:19.460 --> 04:23.780 This is just a variable that's popped from the car models. 04:23.780 --> 04:30.980 In this case, the last one was Suzuki, so the Suzuki was popped from. 04:31.860 --> 04:40.320 This list and the output shows that the value susuki was removed from the end of the list and is now 04:40.320 --> 04:44.310 assigned to the variable popped car models. 04:44.310 --> 04:45.120 That's it. 04:45.120 --> 04:55.260 But here in this list, the new new car model list, we don't have Suzuki anymore here, so how might 04:55.290 --> 04:57.270 this pop method be useful? 04:57.270 --> 04:57.570 Right? 04:57.570 --> 05:05.280 Imagine that the car models in the list are stored in a chronological order according to when we owned 05:05.310 --> 05:05.790 them. 05:05.910 --> 05:15.390 So if this is the case, we can use the pop method to print a statement about last car model we bought. 05:15.690 --> 05:21.000 And the output is simple sentence about the most recent motorcycle here. 05:21.000 --> 05:29.640 So now let's actually create that output now and I think we can delete delete this drawing now. 05:29.670 --> 05:38.080 I hope this helped us help helped you to understand how the logic works here with this pop here and 05:38.080 --> 05:38.950 now. 05:38.950 --> 05:40.150 We will pop. 05:40.660 --> 05:41.920 We will firstly. 05:43.610 --> 05:43.940 Right. 05:44.330 --> 05:44.720 Right. 05:44.720 --> 05:45.470 So. 05:49.010 --> 05:49.820 We have. 05:51.240 --> 05:55.500 Car models and let's actually delete this, our old code now. 05:55.500 --> 05:58.110 And we already created the car models list. 05:58.140 --> 06:00.630 We will do something a bit different here. 06:00.630 --> 06:03.480 So last owned or. 06:03.480 --> 06:05.340 Yeah, last on this. 06:05.340 --> 06:05.940 Okay. 06:05.940 --> 06:12.150 And here we will motorcycles, car models that pop here. 06:12.660 --> 06:17.670 As you remember, this will take the Suzuki down here. 06:18.810 --> 06:22.740 So now we will pop the Suzuki here. 06:22.740 --> 06:27.900 And after that print the F here, we will also we will use format here. 06:28.320 --> 06:34.650 So now the last car, The last car, last. 06:34.650 --> 06:37.080 I'm sorry for the ticking of the keyboard. 06:37.260 --> 06:38.550 So the last. 06:39.960 --> 06:41.100 Car model. 06:41.400 --> 06:42.360 Model. 06:43.520 --> 06:54.800 I owned was a and here we are adding the last owned right last on last owned that title in case we don't 06:54.800 --> 06:56.210 have the title here. 06:56.210 --> 07:01.580 So the first letter uppercase we will write it like so it will look nice, right? 07:02.060 --> 07:03.440 And that's it. 07:03.470 --> 07:05.660 Now we will run this. 07:05.660 --> 07:10.400 And as you can see here, the last car model I owned was a Suzuki.