code: def test_pin_view():
      t = torch.empty([100, 10])
      v = t[10:20]
  
      assert v.is_contiguous()
      assert not F.is_pinned(t)
  
      with pytest.raises(dgl.DGLError):
          dgl.utils.pin_memory_inplace(v)
  
      # make sure an empty view does not generate an error
      u = t[10:10]
      u = dgl.utils.pin_memory_inplace(u)
  
file_path: dgl/tests/python/pytorch/utils/test_pin_memory.py
imports: import backend
  import dgl
  import pytest
  import torch
label_desc: Use image node_id 2 for calling a global function with example usage: test_pin_view() without return types