code: def test_tallqr():
      V = torch.randn(3, 2)
      Q, R = dc.utils.pytorch_utils.tallqr(V)
      assert Q.shape == torch.Size([3, 2])
      assert R.shape == torch.Size([2, 2])
      assert torch.allclose(Q @ R, V)
  
file_path: deepchem/deepchem/utils/test/test_pytorch_utils.py
imports: import deepchem
  import numpy
  import pytest
label_desc: Use image node_id 7 for calling a global function with example usage: test_tallqr() without return types