input: Write a python function to find the intersection of two lists.
  assert get_intersection([1, 3, 5, 7, 8], [2, 3, 7, 8, 9]) == [3, 7, 8]
  assert get_intersection([10, 20, 30], [40, 50, 60]) == []
  assert get_intersection([1, 2, 3], [1, 2, 3, 4, 5]) == [1, 2, 3]
output: def get_intersection(list1, list2):
      return [item for item in list1 if item in list2]