class_docstr: Client wrapper to access Google Cloud Datastore.
docstr: Queries datastore (using exponential backoff).
docstr_tok: ["Queries","datastore","(","using","exponential","backoff",")","."]
code: def query_fetch(self, **kwargs):
      """Queries datastore (using exponential backoff)."""
      return iterate_with_exp_backoff(
          self._client.query(**kwargs).fetch()
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import logging
  import math
  import random
  import time
  import traceback
  from google.cloud import datastore
  from google.cloud import storage
  from google.cloud.exceptions import TooManyRequests
label_desc: Use image node_id 8 for calling the CompetitionDatastoreClient obj's underlying member method code with example usage: obj.query_fetch() and returns: iterate_with_exp_backoff