Slicing a list using a variable, in Python

Question

Given a list

a = range(10)

You can slice it using statements such as

a[1]
a[2:4]

However, I want to do th

Answer 1

>>> a=range(10)
>>> i=[2,3,4]

>>> a[i[0]:i[-1]]
range(2, 4)

>>> list(a[i[0]:i[-1]])
[2, 3]