          extension = os.path.splitext(filename)[1]
          if extension in (".json", ".p", ".yaml", ".yml"):
              retval = Serializer.get_serializer_from_ext(extension)
          elif serializer not in ("json", "pickle", "yaml"):
              raise ValueError("Error: {} is not a valid serializer. Use "
                               "'json', 'pickle' or 'yaml'")
          else:
 
</s> remove         if self.verbose:
            print("Using {} serializer for alignments".format(retval.ext))
 </s> add         logger.verbose("Using '%s' serializer for alignments", retval.ext)
            logger.debug("Serializer set from file extension: '%s'", extension)
          extension = os.path.splitext(filename)[1]
          if extension in (".json", ".p", ".yaml", ".yml"):
            logger.debug("Serializer set from file extension: '%s'", extension)
              retval = Serializer.get_serializer_from_ext(extension)
          elif serializer not in ("json", "pickle", "yaml"):
              raise ValueError("Error: {} is not a valid serializer. Use "
                               "'json', 'pickle' or 'yaml'")
          else:
keep add keep keep keep keep keep
 Logging (#541)

* Convert prints to logger. Further logging improvements. Tidy  up

* Fix system verbosity. Allow SystemExit

* Fix reload extract bug

* Child Traceback handling

* Safer shutdown procedure

* Add shutdown event to queue manager

* landmarks_as_xy > property. GUI notes + linting. Aligner bugfix

* fix FaceFilter. Enable nFilter when no Filter is supplied

* Fix blurry face filter

* Continue on IO error. Better error handling

* Explicitly print stack trace tocrash log

* Windows Multiprocessing bugfix

* Add git info and conda version to crash log

* Windows/Anaconda mp bugfix

* Logging fixes for training 
lib/alignments.py