code: def _ensure_tf_name(self, name):
      if not isinstance(name, six.string_types):
          raise TypeError(
              '"name" should be a string, got {}'.format(type(name))
          )
      try:
          tf_name = self._name_to_tf_name[name]
      except KeyError:
          tf_name = self._make_tf_name(name)
          self._name_to_tf_name[name] = tf_name
      return tf_name
  
imports: from collections import defaultdict
  import os
  import re
  import socket
  import struct
  import time
  import numpy
  import six
  import scipy.misc
  from .crc32c import crc32c
label_desc: Use image node_id 2 for calling the Logger obj's underlying member method code with example usage: obj._ensure_tf_name(name) and returns: tf_name