WEBVTT 00:01.820 --> 00:03.860 Let's go learn dictionary. 00:04.310 --> 00:05.600 Let me create a new file. 00:05.630 --> 00:10.280 Name it dictionary dot Pi. 00:10.430 --> 00:12.650 Here I'm going to create a dictionary. 00:12.680 --> 00:13.400 Okay. 00:13.970 --> 00:18.530 And I have to tell you dictionary has keys and value. 00:18.560 --> 00:21.530 And also a dictionary is a collection okay. 00:21.530 --> 00:27.170 Which is unordered, changeable and indexed. 00:27.410 --> 00:34.370 In Python, dictionaries are writing with curly brackets and they have keys and also values. 00:34.370 --> 00:36.080 So let's go and see that. 00:36.170 --> 00:41.990 For example I have um a table of friends. 00:42.020 --> 00:45.380 Okay friends. 00:46.190 --> 00:50.150 And it is equal to we use curly bracket okay. 00:50.180 --> 00:52.250 Here we use for example name. 00:53.060 --> 00:56.420 And then here we use colon. 00:56.420 --> 01:02.340 And for example name is going to be name at and use schema to separate this. 01:02.370 --> 01:04.380 Now this both okay. 01:04.410 --> 01:06.360 Name and these two. 01:06.390 --> 01:09.240 These are one element now okay. 01:09.240 --> 01:10.230 This is the key. 01:10.230 --> 01:12.690 And this part is the value. 01:12.960 --> 01:16.470 And then we have for example last name. 01:17.940 --> 01:22.710 So last name is for example in Richmond. 01:25.110 --> 01:29.790 And we have date of birth okay. 01:31.830 --> 01:36.300 So date of birth is going to be for example 30 or. 01:36.330 --> 01:39.900 Let's use this one okay. 01:39.930 --> 01:42.210 Now I have a dictionary okay. 01:42.240 --> 01:45.090 That contains keys and values. 01:45.120 --> 01:47.610 And now I can print this okay. 01:47.640 --> 01:48.930 So let's print it okay. 01:48.930 --> 01:51.330 Print friends. 01:53.370 --> 02:00.140 And let's see if it is giving me the keys for the values or both. 02:00.830 --> 02:01.520 Okay. 02:01.550 --> 02:02.570 Python. 02:04.100 --> 02:12.530 And as you see right now, it is giving me the names and also sorry the keys and also the values. 02:12.560 --> 02:13.250 Okay. 02:13.520 --> 02:19.970 So how I, how I can get to this. 02:20.000 --> 02:20.270 Okay. 02:20.300 --> 02:25.460 How can I print for example, uh, only the name. 02:25.970 --> 02:26.420 Okay. 02:26.450 --> 02:27.500 How can I do that. 02:27.500 --> 02:29.180 So let's use here. 02:29.180 --> 02:35.960 For example I have a key and name of key is name okay or last name. 02:35.960 --> 02:41.540 So now let's I'm accessing the values using its key. 02:41.720 --> 02:43.490 Now I have friends okay. 02:43.520 --> 02:44.300 It has a key. 02:44.330 --> 02:47.660 Key is name and its value is name. 02:47.900 --> 02:48.560 Okay. 02:48.650 --> 02:51.560 Now let's see if it is giving me or not. 02:54.110 --> 02:58.100 As you see it is giving me a value for name. 02:58.320 --> 03:04.740 Also, if I ask for DOB, which is date of birth. 03:05.430 --> 03:08.250 Again, it is giving me the date of birth. 03:08.280 --> 03:16.590 Okay, so that is how you can print a the one element from a list. 03:17.700 --> 03:27.300 And also we can use loop to go to go through and print keys and also values. 03:27.300 --> 03:33.480 And by using a function called item built in function called items. 03:33.510 --> 03:34.080 Okay. 03:34.110 --> 03:36.030 So let's go and see that. 03:39.060 --> 03:43.560 Let's use for x and y okay. 03:43.920 --> 03:50.340 And friends dot we have a built in function for this. 03:50.370 --> 03:53.070 It is items okay. 03:53.100 --> 03:54.630 Now we have this. 03:54.630 --> 03:58.910 And right here I'm going to print X and y. 03:59.270 --> 04:04.940 So let's save this and execute the program. 04:04.940 --> 04:07.970 As you see we have name which is name. 04:08.000 --> 04:14.120 And last name and date of birth is 1998. 04:14.150 --> 04:14.750 Okay. 04:16.220 --> 04:21.260 So this is how we can print both of them. 04:21.290 --> 04:22.640 And. 04:24.650 --> 04:32.840 Uh, what else I can tell you we can use condition, but you haven't learned anything about condition 04:32.870 --> 04:33.500 yet. 04:33.710 --> 04:39.710 And we will cover those later on. 04:39.740 --> 04:40.250 Okay. 04:40.280 --> 04:47.630 So here you learn how to print, uh, a value using its key and also how to print both of them. 04:47.630 --> 04:51.830 Key and value for uh, using for loop. 04:51.830 --> 05:01.170 And also we can, uh, concatenate some text here for example, I can say here, okay, while printing 05:01.170 --> 05:03.870 I am going to print a text as well. 05:03.900 --> 05:08.280 I will say key is equal to this one okay. 05:08.310 --> 05:09.990 And then concatenate this. 05:09.990 --> 05:19.680 And then right here I can say value and concatenate that one too. 05:19.830 --> 05:24.540 Now it is I am able to concatenate because this one is a string. 05:24.540 --> 05:26.280 And also this one is also a string. 05:26.280 --> 05:28.830 So string with string can be concatenated. 05:28.860 --> 05:35.370 But if some of them could be integer so it's not able to be concatenated. 05:35.430 --> 05:36.000 Okay. 05:36.570 --> 05:40.620 Now you see key is equal to name and value is equal to name. 05:40.650 --> 05:43.800 And what if I change this to integer. 05:43.830 --> 05:45.450 Let's change it to integer. 05:45.480 --> 05:47.040 Now you see there is. 05:47.100 --> 05:48.960 It will give you an error. 05:49.380 --> 05:51.690 And that is here. 05:52.320 --> 05:54.600 You see it is printing. 05:54.600 --> 05:59.270 The first line is printing the second line, but only is coming to the last one. 05:59.300 --> 06:06.440 It is telling you that you can only concatenate string with string, not integer with string. 06:06.440 --> 06:08.210 So how can I do that? 06:08.240 --> 06:09.890 How can I solve this? 06:10.250 --> 06:16.040 As you see, the key itself is a string and the value is integer. 06:16.040 --> 06:19.040 So here I can change it okay. 06:19.220 --> 06:21.980 Using okay I can cast this okay. 06:22.010 --> 06:24.830 I can use it in str function. 06:25.250 --> 06:30.800 And now the problem will be solved is this is one way that we can do. 06:30.830 --> 06:33.950 Or we could change this back to string. 06:33.950 --> 06:36.950 So we don't need to use str right here. 06:37.490 --> 06:46.850 And that is how we can create our dictionary and how we can use it to print the data and a lot of things. 06:46.880 --> 06:47.570 Okay. 06:47.570 --> 06:50.540 So through the course we will be using this a lot. 06:50.540 --> 06:53.690 And you will learn this with a lot of information. 06:53.720 --> 06:54.980 So see you.