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Foundations of Python Programming: Functions First

Section 9.3 List Element Deletion

Using slices to delete list elements can be awkward and therefore error-prone. Python provides an alternative that is more readable. The del statement removes an element from a list by using its position.
As you might expect, del handles negative indices and causes a runtime error if the index is out of range. In addition, you can use a slice as an index for del. As usual, slices select all the elements up to, but not including, the second index.
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