class_docstr: Torch datasource, for reading from `Torch
  datasets <https://pytorch.org/docs/stable/data.html/>`_.
  This datasource implements a streaming read using a single read task.
class_docstr_tok: ["Torch","datasource",",","for","reading","from","`","Torch","datasets","<","https",":","\/\/pytorch.org\/docs\/stable\/data.html\/",">","`","_",".","This","datasource","implements","a","streaming","read","using","a","single","read","task","."]
code: def estimate_inmemory_data_size(self):
      return None
  
file_path: ray/python/ray/data/datasource/torch_datasource.py
imports: from typing import TYPE_CHECKING
  from ray.data._internal.delegating_block_builder import DelegatingBlockBuilder
  from ray.data.block import BlockMetadata
  from ray.data.datasource.datasource import Datasource, ReadTask
  from ray.util.annotations import DeveloperAPI
label_desc: Use image node_id 3 for calling the TorchDatasource obj's underlying member method code with example usage: obj.estimate_inmemory_data_size() and returns: None