code: def test_shard_same_device(self):
      X = Tensor.ones(256).contiguous().realize()
      X.shard_((d0, X.device), 0)
      (X + X).realize()
  
imports: import functools
  import unittest
  from tinygrad import Tensor, Device, nn, GlobalCounters
  from tinygrad.device import _BufferCopy
  from tinygrad.helpers import CI
  from tinygrad.jit import TinyJit
  from tinygrad.nn.state import get_parameters
  import numpy
label_desc: Use image node_id 3 for calling the TestMultiTensor obj's underlying member method code with example usage: obj.test_shard_same_device() without return types