make version of ts_mon compatible with appengine

infra_libs/ts_mon/monitors.py

 # Copyright 2015 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.
 
 """Classes representing the monitoring interface for tasks or devices.
 
 Usage:
   import argparse
   from infra_libs import ts_mon
 
@@ skipping 25 matching lines @@
 import json
 import logging
 import os
 
 from monacq import acquisition_api
 from monacq.proto import metrics_pb2
 
 from infra_libs import logs
 import infra_libs
 
-import httplib2
 from apiclient import discovery
 from oauth2client.client import GoogleCredentials
 from oauth2client.file import Storage
+import httplib2
 
 
 def _logging_callback(resp, content):  # pragma: no cover
   logging.debug(repr(resp))
   logging.debug(content)
 
 
 class Monitor(object):
   """Abstract base class encapsulating the ability to collect and send metrics.
 
@@ skipping 46 matching lines @@
     self._api = api
 
   def send(self, metric_pb):
     """Send a metric proto to the monitoring api.
 
     Args:
       metric_pb (MetricsData or MetricsCollection): the metric protobuf to send
     """
     try:
       self._api.Send(self._wrap_proto(metric_pb))
-    except acquisition_api.AcquisitionApiRequestException as e:
+    except acquisition_api.AcquisitionApiRequestException as e: # pylint: disable=undefined-variable
       logging.error('Failed to send the metrics: %s', e)
 
 
 class PubSubMonitor(Monitor):
   """Class which publishes metrics to a Cloud Pub/Sub topic."""
 
   _SCOPES = [
       'https://www.googleapis.com/auth/pubsub',
   ]
 
@@ skipping 50 matching lines @@
     logs.add_handler(self._logger, handler=filehandler, level=logging.INFO)
 
   def send(self, metric_pb):
     self._logger.info('\n' + str(self._wrap_proto(metric_pb)))
 
 
 class NullMonitor(Monitor):
   """Class that doesn't send metrics anywhere."""
   def send(self, metric_pb):
     pass