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list slicing

Have you not been drinking enough
water? I wanted the three fastest times
for each athlete...but you’ve given me
everything and it contains duplicates!

In your haste to sanitize and sort your data, you forgot to worry about what
you were actually supposed to be doing: producing the three fastest times for each
athlete. And, of course, there’s no place for any duplicated times in your
output.
Accessing the first three data items from any list is easy. Either specify each list
item individually using the standard notation or use a list slice:

Access each data item james[0]
you need individually. james[1]

james[2]
Use a list slice to access from list

james[0:3] item 0 up-to-but-not-including
list item 3.

But…what about removing duplicates from your list?

160 Chapter 5