WEBVTT 00:01.160 --> 00:10.010 Hello, in this session, we will discuss about list of the list comprehensions are used for creating 00:10.010 --> 00:13.010 new lists from other attributes. 00:14.210 --> 00:18.560 These tables could be list dictionaries. 00:20.860 --> 00:29.650 As list comprehension returns, a list that consists of brackets containing the expression which is 00:29.650 --> 00:36.610 executed for each element, along with the follow through, I read over each element. 00:37.240 --> 00:45.920 So we would be using a simple way of doing the same thing which you were doing using a long before. 00:45.920 --> 00:49.470 You let us see an example. 00:50.620 --> 01:05.080 Let us say we want to find out squares of numbers so we can see for I in range twenty and out of these 01:05.080 --> 01:07.870 numbers we want to find out. 01:10.040 --> 01:17.420 The values such that these are squares of these numbers, so we want to find out. 01:18.550 --> 01:20.480 X, is it for you? 01:21.370 --> 01:21.820 I. 01:25.390 --> 01:33.180 Now, I have these values and I want to add these values to a particular list, so let us create a simple 01:33.190 --> 01:33.660 list. 01:33.940 --> 01:40.120 See, a list is equal to square brackets so that it is an empty list. 01:40.660 --> 01:47.410 Now, I want to obtain this value so I can see enlistee dot up in. 01:49.970 --> 01:55.280 X. So this will offend these values to list and then I can. 01:56.750 --> 02:04.200 Simply print the list for you, so let us run this particular piece of code. 02:04.640 --> 02:13.580 So here you can see that I have iteratively created a list of numbers which has squares of numbers from 02:13.580 --> 02:15.230 zero to 90. 02:16.040 --> 02:20.610 Now, I can do this in a much more simpler manner. 02:20.900 --> 02:29.660 So what I can do is I can simply create another list list, too, and I will define it by the two square 02:29.660 --> 02:30.320 brackets. 02:30.560 --> 02:33.830 And inside that I will give for. 02:35.080 --> 02:47.770 I say it's in range, the same thing, just the way we give it here for I in range 20, this is the 02:47.770 --> 02:49.960 exact same language I am giving you. 02:54.060 --> 02:59.850 And instead of doing all these things, I just need to like. 03:02.070 --> 03:03.150 I spoke with. 03:04.450 --> 03:15.790 Here, this means that for every value in these 20, we need to get values which I today's to the power 03:15.800 --> 03:19.420 to, and then we will something else do for you. 03:21.180 --> 03:25.050 So you can see all the same values are being generated. 03:26.100 --> 03:30.940 It is just the same, but only thing is it is a lot more faster. 03:31.710 --> 03:34.510 It is a lot more faster and simpler. 03:35.930 --> 03:43.350 So we can create a much more complex list also using this, so let's create one. 03:43.970 --> 03:44.910 So let us see. 03:44.930 --> 03:53.600 We want to create the same thing, but this time we want to do it for, just say, even numbers or numbers. 03:53.630 --> 03:56.300 So what we can do is we can do it if. 03:57.430 --> 03:57.880 I. 04:04.440 --> 04:10.100 Is equal to zero, so if I is divisible by two. 04:12.650 --> 04:19.520 So in that case, let us get this so it is returning the squares for only. 04:21.930 --> 04:23.040 Even numbers. 04:25.310 --> 04:32.030 Similarly, we can perform any complex operations, I want to multiply three, do it, and then I won't 04:32.030 --> 04:41.240 do that, they add some numbers to it so I can do any complex operation on top of it and I'll be able 04:41.240 --> 04:42.410 to get the results of what? 04:44.430 --> 04:53.310 So this is the usage of list comprehension and you can try different complex list comprehensions so 04:53.790 --> 04:56.500 you can try out different ranges also. 04:56.520 --> 05:00.980 So let's say we want to generate a particular list there. 05:00.990 --> 05:04.740 I want to get something like a particular number. 05:04.740 --> 05:12.720 Say three things for I in range. 05:15.320 --> 05:22.840 For a few more minutes, let's say, we want to open for. 05:25.050 --> 05:27.480 It went the list. 05:33.340 --> 05:34.960 Sorry, this has to be. 05:45.560 --> 05:53.300 So we can go in any direction that we have different kind of results and use them for.