message: Tensor tracer python3 compatibility.
diff: @@ -1844,7 +1844,7 @@ class TensorTracer(object):
  if len(processed_tensors) != 1:
  raise RuntimeError('Multiple stats are only allowed in compact '
  'mode.')
  - processed_out_tensor = processed_tensors.values()[0]
  + processed_out_tensor = list(processed_tensors.values())[0]
  # Store the whole tensor in a buffer.
  trace_op = self._snapshot_tensor(processed_out_tensor)
  else:
  