class_docstr: Most tests done in the base class LinearOperatorDerivedClassTest.
class_docstr_tok: ["Most","tests","done","in","the","base","class","LinearOperatorDerivedClassTest","."]
code: def operator_and_matrix(
      self,
      build_info,
      dtype,
      use_placeholder,
      ensure_self_adjoint_and_pd=False,
  ):
      del ensure_self_adjoint_and_pd
      del use_placeholder
      shape = list(build_info.shape)
      assert shape[-1] == shape[-2]
  
      batch_shape = shape[:-2]
      num_rows = shape[-1]
  
      operator = linalg_lib.LinearOperatorZeros(
          num_rows, batch_shape=batch_shape, dtype=dtype
      )
      matrix = array_ops.zeros(shape=shape, dtype=dtype)
  
      return operator, matrix
  
imports: import numpy
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_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 4 for calling the LinearOperatorZerosTest obj's underlying member method code with example usage: obj.operator_and_matrix(build_info, dtype, use_placeholder, ensure__adjoint_and_pd) and returns: operator,  matrix