TypeError: list indices must be integers, not tupl

This is a common question on SO but all the examples I've looked at are fairly complicated. So I am posting the simplest example I can think of to get a straight-forward answer.

x = [(1,2),(3,4),(5,6)]
print(x[0])
  (1,2)
print(x[0,1])
  TypeError: list indices must be integers or slices, not tuple

The error message indicates that if I want a consecutive range of elements, I can use a slice: x[0:2]. But what if I want non-consecutive elements like x[0,2]? How do I get those by index?

Using pure python you could use a list comprehension

def get_values(data, indices):
  return [data[i] for i in indices]

For example

>>> x = [(1,2),(3,4),(5,6)]
>>> get_values(x, [0, 2])
[(1, 2), (5, 6)]

Using numpy you could directly use another array to index

>>> import numpy as np
>>> arr = np.array([(1,2),(3,4),(5,6)])
>>> arr[np.array([0,2])]
array([[1, 2],
       [5, 6]])