input: Write a function that takes in a list and uses a generator to return each item from the list one by one.
  
  ### Function:
  def list_generator(input_list):
      for item in input_list:
          yield item
  
  ### Test Cases:
  gen = list_generator([1,3,5,7,9])
  for item in gen:
      print(item)
output: def list_generator(input_list):
      for item in input_list:
          yield item