input: Write a python function to print all even numbers from 1 to 50.
  assert get_even_numbers() == [2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50]
output: def get_even_numbers():
      return [i for i in range(1, 51) if i % 2 == 0]