Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated: 1 00:00:01,550 --> 00:00:08,189 Great, now let's look at lists, so in the previous lecture we were looking at 3 00:00:08,189 --> 00:00:14,250 strings and indexing and splitting strings and I will be working with lists 5 00:00:14,250 --> 00:00:20,210 which are very similar to strings. They are similar because they are both 7 00:00:20,210 --> 00:00:25,949 referred to as sequences, so there are sequences of items. The difference is 9 00:00:25,949 --> 00:00:35,910 that, let me open Python, and so the difference is that the string is made of 11 00:00:35,910 --> 00:00:41,730 other strings so it can contain only strings of characters or strings. 13 00:00:41,730 --> 00:00:49,079 whatever you like to call it, however lists can contain various other data 15 00:00:49,079 --> 00:01:00,809 types, let's say H a letter, a number, and also a string. So this is a string the 17 00:01:00,809 --> 00:01:05,970 first one, this is a number, an integer. This is also string with multiple 19 00:01:05,970 --> 00:01:14,460 characters and that is a list, so for this you want to use square brackets to 21 00:01:14,460 --> 00:01:21,450 create a list. Execute and yeah you can call it and so this is a list of three 23 00:01:21,450 --> 00:01:26,460 items and you can also store other objects in a list but we'll cover other 25 00:01:26,460 --> 00:01:33,320 objects in later sections, you know we have table of objects with lots of data. 27 00:01:33,320 --> 00:01:39,180 You may store files in a list you may store widgets of a graphical user 29 00:01:39,180 --> 00:01:45,570 interface that you are building and so on, so these are very useful and lists also 31 00:01:45,570 --> 00:01:51,180 have indexing and you can split lists, you can extract items and so on. So the 33 00:01:51,180 --> 00:01:56,790 good news is that lists have the same indexing system as strings and so 35 00:01:56,790 --> 00:01:59,790 you've learned that in the previous lecture and you can go ahead and apply 37 00:01:59,790 --> 00:02:06,979 that system not, so let's extract number 2. That would have an index of one. 39 00:02:06,979 --> 00:02:14,720 Execute that and yeah you get 2 there. If you check the type you'll see that's an integer. 41 00:02:14,720 --> 00:02:20,760 So every item of a list has its own data type, even also access more than 43 00:02:20,760 --> 00:02:28,970 white one item of a list. Let's say you want the first two items. You do 0 1 2, so 45 00:02:28,970 --> 00:02:38,010 like that or 0 to 2 whatever you like. That will produce another list so the 47 00:02:38,010 --> 00:02:49,459 type of this split is a list. The type of the split of a string is a string, so S 49 00:02:49,459 --> 00:02:57,390 for the string here, C for the list. Lists now have methods associated with 51 00:02:57,390 --> 00:03:02,130 them just like strings do and so you can check what methods you have available 53 00:03:02,130 --> 00:03:08,220 there by just doing a dir list. So this a the blueprint you can use 55 00:03:08,220 --> 00:03:13,200 lists, you can pass empty square brackets in there, it's the same thing and then 57 00:03:13,200 --> 00:03:20,510 you can use help to look at each of these methods, so these are the methods. 59 00:03:20,510 --> 00:03:31,260 Without the underscore and let's look at the append method, so to apply methode 61 00:03:31,260 --> 00:03:39,690 you do c the dot notation append and here on that 3. What that does, it adds 63 00:03:39,690 --> 00:03:44,549 another item to the end of the list, So it appends an item to the 65 00:03:44,549 --> 00:03:49,850 list and you can explore the other methods if you like so let's say help. 67 00:03:49,850 --> 00:03:59,160 Remove like that and you'll see how to use that remove method, so you do 69 00:03:59,160 --> 00:04:03,750 c.remove and then you pass the value of the item that you want to remove, so 71 00:04:03,750 --> 00:04:10,440 not the index but the value. Let's say we want to remove 2 and you see that 2 73 00:04:10,440 --> 00:04:16,979 is now gone from the list so look at the other methods of the list and try 75 00:04:16,979 --> 00:04:21,720 to experiment with this and play around with them access items and split them 77 00:04:21,720 --> 00:04:27,470 and you'll be good to go then. Thanks, I'll talk to you later. 4696