shutdown quality fixes

src/shutdown.py

@@ -1,3 +1,4 @@
+"""shutdown function"""
 import os
 import Queue
 import threading
@@ -15,8 +16,7 @@ from queues import (
 
 
 def doCleanShutdown():
-    # Used to tell proof of work worker threads
-    # and the objectProcessorThread to exit.
+    """Used to tell proof of work worker threads and the objectProcessorThread to exit."""
     state.shutdown = 1
 
     objectProcessorQueue.put(('checkShutdownVariable', 'no data'))
@@ -53,7 +53,7 @@ def doCleanShutdown():
 
     for thread in threading.enumerate():
         if (thread is not threading.currentThread() and
-            isinstance(thread, StoppableThread) and
+                isinstance(thread, StoppableThread) and
                 thread.name != 'SQL'):
             logger.debug("Waiting for thread %s", thread.name)
             thread.join()
@@ -76,10 +76,10 @@ def doCleanShutdown():
             except Queue.Empty:
                 break
 
-    if shared.thisapp.daemon or not state.enableGUI: # FIXME redundant?
+    if shared.thisapp.daemon or not state.enableGUI:  # ..fixme:: redundant?
         logger.info('Clean shutdown complete.')
         shared.thisapp.cleanup()
-        os._exit(0)
+        os._exit(0)  # pylint: disable=protected-access
     else:
         logger.info('Core shutdown complete.')
     for thread in threading.enumerate():