message: work around circular dependencies
diff: @@ -39,7 +39,6 @@ from tensorflow.python.ops import gen_string_ops
  from tensorflow.python.ops import list_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import sort_ops
  -from tensorflow.python.ops.parallel_for import control_flow_ops as parallel_ops
  from tensorflow.python.ops import check_ops
  from tensorflow.python.util import lazy_loader
  from tensorflow.python.util import nest
  @@ -50,6 +49,10 @@ from tensorflow.python.util import nest
  input_lib = lazy_loader.LazyLoader(
  'input_lib', globals(),
  'tensorflow.python.distribute.input_lib')
  +parallel_ops = lazy_loader.LazyLoader(
  + 'parallel_ops', globals(),
  + 'tensorflow.python.ops.parallel_for.control_flow_ops'
  +)
  UNSPECIFIED = object()
  