input: def list_generator(input_list):
      """ Create a Python generator that returns numbers from a given list.
      >>> gen = list_generator([1,3,5,7,9])
      >>> next(gen)
      1
      >>> next(gen)
      3
      >>> next(gen)
      5
      >>> next(gen)
      7
      >>> next(gen)
      9
      """
      for item in input_list:
          yield item
output:     for item in input_list:
          yield item