class_docstr: An abstraction representing a microbatch in the pipeline.
class_docstr_tok: ["An","abstraction","representing","a","microbatch","in","the","pipeline","."]
code: def __getitem__(self, index: int):
      if not self.atomic:
          return self._values[index]
  
      if index != 0:
          raise IndexError("atomic batch allows index 0 only")
  
      return self._values
  
imports: import typing
  from typing import Any, Callable, List, Union, cast, Sequence
  import torch
  from torch import Tensor
  import torch.cuda.comm
label_desc: Use image node_id 10 for calling the Batch obj's underlying member method code with example usage: obj.__getitem__(index) and returns: self, self