code: def allsame(iterable, eq=operator.eq):
      
      iter_ = iter(iterable)
      try:
          first = next(iter_)
      except StopIteration:
          return True
      return all(eq(first, item) for item in iter_)
docs: Determine if all items in a sequence are the same
  
      Args:
          iterable (Iterable): items to determine if they are all the same
  
          eq (Callable, optional): function to determine equality
              (default: operator.eq)
  
      Example:
          >>> allsame([1, 1, 1, 1])
          True
          >>> allsame([])
          True
          >>> allsame([0, 1])
          False
          >>> iterable = iter([0, 1, 1, 1])
          >>> next(iterable)
          >>> allsame(iterable)
          True
          >>> allsame(range(10))
          False
          >>> allsame(range(10), lambda a, b: True)
          True