input: Write a python function to get even numbers from a list.
  assert get_even_numbers([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]) == [2, 4, 6, 8, 10]
  assert get_even_numbers([10, 15, 20, 25, 30]) == [10, 20, 30]
  assert get_even_numbers([11, 13, 17, 19]) == []
output: def get_even_numbers(lst):
      return [num for num in lst if num % 2 == 0]