Catch exceptions during shutdown.

Leaving this unhandled could prevent other devices in the same process (e.g. on a controller) being shut down.

Author: mickp

microscope/devices.py

@@ -253,7 +253,10 @@ def initialize(self):
 
     def shutdown(self):
         """Shutdown the device for a prolonged period of inactivity."""
-        self.disable()
+        try:
+            self.disable()
+        except Exception as e:
+            _logger.debug("Exeption in disable() during shutdown: %s" % e)
         _logger.info("Shutting down ... ... ...")
         self._on_shutdown()
         _logger.info("... ... ... ... shut down completed.")