input: Write a function that creates a Python generator to yield numbers from a given list.
  
  def list_generator(input_list):
      for item in input_list:
          yield item
  
  gen = list_generator([1, 3, 5, 7, 9])
  assert list(gen) == [1, 3, 5, 7, 9]
  gen = list_generator([])
  assert list(gen) == []
  gen = list_generator([2])
  assert list(gen) == [2]
output: def list_generator(input_list):
      for item in input_list:
          yield item