code: def test_change_basis_real_to_complex_dtype_conversion(self):
      # Test for dtype conversion (complex128 to complex64)
      j = 1
      Q_complex128 = equivariance_utils.change_basis_real_to_complex(
          j, dtype=torch.complex128
      )
      Q_complex64 = equivariance_utils.change_basis_real_to_complex(
          j, dtype=torch.complex64
      )
  
      self.assertEqual(Q_complex128.dtype, torch.complex128)
      self.assertEqual(Q_complex64.dtype, torch.complex64)
  
file_path: deepchem/deepchem/utils/test/test_equivariance_utils.py
imports: import unittest
label_desc: Use image node_id 8 for calling the TestEquivarianceUtils obj's underlying member method code with example usage: obj.test_change_basis_real_to_complex_dtype_conversion() without return types