class_docstr: Adder that will fail if used.
class_docstr_tok: ["Adder","that","will","fail","if","used","."]
code: def can_add(self, op1, op2):
      raise AssertionError("BadAdder.can_add called!")
  
imports: import numpy
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import linalg_ops
  from tensorflow.python.ops.linalg import linalg
  from tensorflow.python.ops.linalg import linear_operator_addition
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the _BadAdder obj's underlying member method code with example usage: obj.can_add(op1, op2) without return types