Improved user-facing messages

verification/presubmit_check.py

 # coding=utf8
 # Copyright (c) 2011 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.
 """Runs presubmit check on the source tree."""
 
 import logging
 import os
 import sys
 import time
 
-from verification import base
+from verification import base  # pylint: disable=F0401
 
-import find_depot_tools  # pylint: disable=W0611
-import subprocess2
+import find_depot_tools  # pylint: disable=W0611,F0401
+import subprocess2  # pylint: disable=F0401
 
 
 class PresubmitCheckVerifier(base.VerifierCheckout):
   name = 'presubmit'
 
   def __init__(self, context_obj, timeout=6*60):
     super(PresubmitCheckVerifier, self).__init__(context_obj)
     self.root_dir = os.path.dirname(os.path.abspath(__file__))
     self.execution_timeout = timeout
 
@@ skipping 62 matching lines @@
           pending,
           {
             'duration': duration,
             'output': e.stdout,
             'return': e.returncode,
             'timed_out': timed_out,
           })
 
   def update_status(self, queue):
     pass