class_docstr: This class uses a `RunnerSingleGPU` object to train a model on a single
  GPU.
class_docstr_tok: ["This","class","uses","a","`","RunnerSingleGPU","`","object","to","train","a","model","on","a","single","GPU","."]
docstr: Nothing to sync on single GPU.
docstr_tok: ["Nothing","to","sync","on","single","GPU","."]
code: def _sync_params(self, forced=False):
      """
      Nothing to sync on single GPU.
      """
      return True
  
imports: from collections import OrderedDict
  import logging
  import math
  import time
  import os
  import numpy
  import six
  import tensorflow
  from cleverhans.utils_tf import batch_indices
  from cleverhans.utils_mnist import data_mnist
  import utils_cifar
  import utils_svhn
  from utils import preprocess_batch
  from make_model import make_model
  from evaluator import Evaluator
  from evaluator import create_adv_by_name
  from model import clone_variable
label_desc: Use image node_id 3 for calling the TrainerSingleGPU obj's underlying member method code with example usage: obj._sync_params(forced) and returns: True