[Predator] Switch from anonymous dict to CrashData.

appengine/findit/util_scripts/iterator.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Fetches entities and iterate over and process them."""
 
 import os
 
 import remote_api  # pylint: disable=W
 
@@ skipping 18 matching lines @@
             app_id,
             fields=None,
             filter_func=None,
             batch_size=_DEFAULT_BATCH_SIZE,
             batch_run=False):  # pragma: no cover.
   """Iterates entities queried by query.
 
   Args:
     query (ndb.Query): The query to fetch entities.
     app_id (str): App engine app id.
-    fields (list): Field names of an datastore model entity to be projected
-      to a dict. If None provided, return the entities instead of projected
-      dict.
+    fields (list or None): Field names of an datastore model entity to be
+      projected to a dict. If None provided, return the entities instead of
+      projected dict.
     filter_func (function): A function that does in memory filtering.
     batch_size (int): The number of entities to query at one time.
     batch_run (bool): If True, iterate batches of entities, if
       False, iterate each entity.
 
     An exmaple is available in crash_printer/print_crash.py.
   """
   remote_api.EnableRemoteApi(app_id)
 
   cursor = None
@@ skipping 12 matching lines @@
     if batch_run:
       yield entities
     else:
       for entity in entities:
         yield entity
 
     if not more:
       break
 
     cursor = next_cursor