1
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It's awkward and error-prone to use slicing to delete things out of a list.

2
00:00:14,160 --> 00:00:20,010
So, Python gives us a special operator to do that it's called the delete operator, del.

3
00:00:20,010 --> 00:00:24,225
In this case, in this code we're creating a list called

4
00:00:24,225 --> 00:00:28,620
a with three items in it: one, two and three.

5
00:00:28,620 --> 00:00:33,700
And then we're calling the del operator to remove item one.

6
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So, let's see this in CodeLens.

7
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We first create the list and then a square bracket one refers to this position,

8
00:00:47,210 --> 00:00:53,750
and when we delete it the value three is now going to move

9
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up into position one and we'll end up with just one and three in our list.

10
00:01:01,130 --> 00:01:07,490
Now we've just got one and three and we can not just delete a single item,

11
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we can delete a whole sequence of items.

12
00:01:11,210 --> 00:01:15,060
Here we have a list: a, b, c, d,

13
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e and f. We're going to start at position one,

14
00:01:19,720 --> 00:01:24,905
go all the way up to but not including position five.

15
00:01:24,905 --> 00:01:28,220
Now it's a list, square bracket one,

16
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colon five and that's all going to be deleted.

17
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So, do that and we're left with just a and f.