class_docstr: Represents a device on a remote worker.
  
  Args:
      remote_device (str or torch.device): Represents a device on a remote worker.
          The string format should be one of the following:
  
              1. "<workername>/<device>", where the device field can be parsed as torch.device type.
                 E.g., "trainer0/cpu", "trainer0", "ps0/cuda:0".
                 In addition, the device field can be optional and the default value is "cpu".
              2. "rank:<rank>/<device>", where <rank> is the rank of the
                 process and device can be parsed as torch.device type.
                 E.g., "rank:0/cpu", "rank:0", "rank:0/cuda:0"
              3. <workername> and <rank> are optional and formats like "cpu"
                  and "cuda:1", just represent local devices.
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docstr: Return the local device on the remote worker.
docstr_tok: ["Return","the","local","device","on","the","remote","worker","."]
code: def device(self) -> torch.device:
      """Return the local device on the remote worker."""
      return self._device
  
file_path: pytorch/torch/distributed/remote_device.py
imports: from typing import Optional, Union
  import torch
label_desc: Use image node_id 5 for calling the _remote_device obj's underlying member method code with example usage: obj.device() and returns: self