class_docstr: Most tests done in the base class LinearOperatorDerivedClassTest.
class_docstr_tok: ["Most","tests","done","in","the","base","class","LinearOperatorDerivedClassTest","."]
code: def test_diag_inverse_type(self):
      diag = [1.0, 3.0, 5.0, 8.0]
      operator = linalg.LinearOperatorDiag(diag, is_non_singular=True)
      self.assertIsInstance(
          operator.inverse(), linalg.LinearOperatorDiag
      )
  
imports: from tensorflow.python.framework import config
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import linalg_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import random_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.ops.linalg import linalg
  from tensorflow.python.ops.linalg import linear_operator_test_util
  from tensorflow.python.platform import test
label_desc: Use image node_id 18 for calling the LinearOperatorDiagTest obj's underlying member method code with example usage: obj.test_diag_inverse_type() without return types