code: def last(iterable, default=None):
      
  
      result = default
  
      iterator = iter(iterable)
  
      while True:
          try:
              result = next(iterator)
  
          except StopIteration:
              break
  
      return result
docs: Try to get the last iterable item by successive iteration on it.
  
      :param Iterable iterable: iterable to iterate on. Must provide the method
          __iter__.
      :param default: default value to get if input iterable is empty.
      :raises TypeError: if iterable is not an iterable value.
  
      :Example:
  
      >>> last('tests')
      's'
      >>> last('', default='test')
      'test'
      >>> last([])
      None