code: def test_nonzero():
      x = tensor([[1, 0, 0], [0, 2, 0], [1, 1, 0]], chunk_size=2)
      y = nonzero(x)
  
      assert len(y) == 2
  
      tile(y[0])
  
imports: import numpy
  import pytest
  from ....config import option_context
  from ....core import tile
  from ...base.broadcast_to import TensorBroadcastTo
  from ...datasource import ones, tensor, array, empty
  from ...datasource.ones import TensorOnes
  from ...merge.concatenate import TensorConcatenate
  from ..None import choose, unravel_index, nonzero, compress, fill_diagonal
  from ..setitem import TensorIndexSetValue
label_desc: Use image node_id 13 for calling a global function with example usage: test_nonzero() without return types