input: Write a python function to create an iterator that returns elements from the collection until the collection is exhausted.
  assert list(create_iterator([1, 2, 3, 4, 5])) == [1, 2, 3, 4, 5]
  assert list(create_iterator({'a': 1, 'b': 2})) == ['a', 'b']
  assert list(create_iterator((10, 20, 30))) == [10, 20, 30]
output: def create_iterator(collection):
      for item in collection:
          yield item