input: Write a function to create a Python generator that returns 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([2,4,6,8])
  assert list(gen) == [2,4,6,8]
  
  gen = list_generator([])
  assert list(gen) == []
output: def list_generator(input_list):
      for item in input_list:
          yield item