code: def nonzero_numpy(g: jit_utils.GraphContext, input, _outputs=None):
      return unbind(g, opset9.nonzero(g, input), 1, _outputs=_outputs)
  
imports: import functools
  import torch
  import torch._C._onnx
  from torch.onnx import _constants, _type_utils, errors, symbolic_helper, symbolic_opset11, symbolic_opset9, utils
  from torch.onnx._internal import _beartype, jit_utils, registration
label_desc: Use image node_id 11 for calling a global function with example usage: nonzero_numpy(g, input, _outputs) and returns: unbind