[issue47257] add methods to get first and last elements of a range

[Mark Dickinson]

Mark Dickinson <dickinsm at gmail.com> added the comment:

> but it's messy and potentially tricky to get the actual first and last values of the range

Doesn't simple indexing already provide what you need here?

>>> range(1, 5, 2)[0]  # first element of range
1
>>> range(1, 5, 2)[-1]  # last element of range
3

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nosy: +mark.dickinson

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<https://bugs.python.org/issue47257>
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