X-Git-Url: https://wannabe.guru.org/gitweb/?a=blobdiff_plain;f=persistent.py;h=c902313eb4a28cb4635779f584f8775a2b646d35;hb=e8fbbb7306430478dec55d2c963eed116d8330cc;hp=16f51c04160e8b05f7de83894b13d06cf11bc8e4;hpb=7ff2af6fe7bffea90dc4a31c93140c189917c659;p=python_utils.git

diff --git a/persistent.py b/persistent.py
index 16f51c0..c902313 100644
--- a/persistent.py
+++ b/persistent.py
@@ -1,5 +1,9 @@
 #!/usr/bin/env python3
 
+"""A Persistent is just a class with a load and save method.  This
+module defines the Persistent base and a decorator that can be used to
+create a persistent singleton that autoloads and autosaves."""
+
 import atexit
 import datetime
 import enum
@@ -136,34 +140,29 @@ class persistent_autoloaded_singleton(object):
             # memory.
             if self.instance is not None:
                 logger.debug(
-                    f'Returning already instantiated singleton instance of {cls.__name__}.'
+                    'Returning already instantiated singleton instance of %s.', cls.__name__
                 )
                 return self.instance
 
             # Otherwise, try to load it from persisted state.
             was_loaded = False
-            logger.debug(f'Attempting to load {cls.__name__} from persisted state.')
+            logger.debug('Attempting to load %s from persisted state.', cls.__name__)
             self.instance = cls.load()
             if not self.instance:
                 msg = 'Loading from cache failed.'
                 logger.warning(msg)
-                logger.debug(f'Attempting to instantiate {cls.__name__} directly.')
+                logger.debug('Attempting to instantiate %s directly.', cls.__name__)
                 self.instance = cls(*args, **kwargs)
             else:
-                logger.debug(
-                    f'Class {cls.__name__} was loaded from persisted state successfully.'
-                )
+                logger.debug('Class %s was loaded from persisted state successfully.', cls.__name__)
                 was_loaded = True
 
             assert self.instance is not None
 
             if self.persist_at_shutdown is PersistAtShutdown.ALWAYS or (
-                not was_loaded
-                and self.persist_at_shutdown is PersistAtShutdown.IF_NOT_LOADED
+                not was_loaded and self.persist_at_shutdown is PersistAtShutdown.IF_NOT_LOADED
             ):
-                logger.debug(
-                    'Scheduling a deferred called to save at process shutdown time.'
-                )
+                logger.debug('Scheduling a deferred called to save at process shutdown time.')
                 atexit.register(self.instance.save)
             return self.instance