[Findit] Add iterator and crash_iterator for delta test

appengine/findit/util_scripts/crash_queries/crash_printer/print_crash.py

Index: appengine/findit/util_scripts/crash_queries/crash_printer/print_crash.py
diff --git a/appengine/findit/util_scripts/crash_queries/crash_printer/print_crash.py b/appengine/findit/util_scripts/crash_queries/crash_printer/print_crash.py
new file mode 100644
index 0000000000000000000000000000000000000000..63baddc8b296ab28731aa934917c20660f2cdade
--- /dev/null
+++ b/appengine/findit/util_scripts/crash_queries/crash_printer/print_crash.py
@@ -0,0 +1,45 @@
+# 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.
+
+import argparse
+from datetime import date
+from datetime import timedelta
+import os
+
+from crash_queries.crash_printer import crash_printer
+
+_DATETIME_FORMAT = '%Y-%m-%d'
+_TODAY = date.today().strftime(_DATETIME_FORMAT)
+_A_YEAR_AGO = (date.today() - timedelta(days=365)).strftime(_DATETIME_FORMAT)
+
+
+if __name__ == '__main__':
+  argparser = argparse.ArgumentParser(
+      description='Print crashes.')
+
+  argparser.add_argument(
+      '--since',
+      default=_A_YEAR_AGO,
+      help=('Query data since this date (including this date). '
+            'Should be in YYYY-MM-DD format. E.g. 2015-09-31. '
+            'Defaults to a year ago.'))
+
+  argparser.add_argument(
+      '--until',
+      default=_TODAY,

[lijeffrey, 2016/10/20 15:35:46]

nit: is there a reason you include the -c shortcut for client but not -u or -s
for since/util?

[Sharu Jiang, 2016/10/20 20:38:21]

Done.

+      help=('Query data until this date (not including this date). '
+            'Should be in YYYY-MM-DD format. E.g. 2015-09-31. '
+            'Defaults to today.'))
+
+  argparser.add_argument(
+      '--client',
+      '-c',
+      default='fracas',
+      help=('Possible values are: fracas, cracas, clusterfuzz. Right now, only '
+            'fracas is supported.'))
+
+  args = argparser.parse_args()
+
+  crash_printer.CrashPrinter(args.client, os.getenv('APP_ID'),
+                             start_date=args.since, end_date=args.until)