class_docstr: Dataset partitioning helper 
class_docstr_tok: ["Dataset","partitioning","helper"]
code: def __init__(self, data, index):
      self.data = data
      self.index = index
  
imports: import math
  import random
  import time
  import torch
  import torch.distributed
  import torch.nn
  import torch.nn.functional
  import torch.optim
  import torchvision.datasets
  import torchvision.transforms
  import fiber
  from fiber.experimental import Ring
label_desc: Use image node_id 1 to create a new Partition object  with example: obj = Partition(data, index)