X-Git-Url: https://wannabe.guru.org/gitweb/?a=blobdiff_plain;f=persistent.py;h=d62dd6754eeffc78c1c09adea7c82e778f8450b3;hb=822454f580c1ff9eb207b8da46cdfae24e30cde1;hp=8829d6de657c213845356b7c32caa2a644a1eb54;hpb=21562149bda41588b65e4553d216fd0103761811;p=python_utils.git

diff --git a/persistent.py b/persistent.py
index 8829d6d..d62dd67 100644
--- a/persistent.py
+++ b/persistent.py
@@ -20,6 +20,7 @@ class Persistent(ABC):
     and implement their save() and load() methods.
 
     """
+
     @abstractmethod
     def save(self) -> bool:
         """
@@ -64,16 +65,12 @@ def was_file_written_today(filename: str) -> bool:
 
     mtime = file_utils.get_file_mtime_as_datetime(filename)
     now = datetime.datetime.now()
-    return (
-        mtime.month == now.month and
-        mtime.day == now.day and
-        mtime.year == now.year
-    )
+    return mtime.month == now.month and mtime.day == now.day and mtime.year == now.year
 
 
 def was_file_written_within_n_seconds(
-        filename: str,
-        limit_seconds: int,
+    filename: str,
+    limit_seconds: int,
 ) -> bool:
     """Returns True if filename was written within the pas limit_seconds
     seconds.
@@ -93,9 +90,10 @@ class PersistAtShutdown(enum.Enum):
     to disk.  See details below.
 
     """
-    NEVER = 0,
-    IF_NOT_LOADED = 1,
-    ALWAYS = 2,
+
+    NEVER = (0,)
+    IF_NOT_LOADED = (1,)
+    ALWAYS = (2,)
 
 
 class persistent_autoloaded_singleton(object):
@@ -118,10 +116,12 @@ class persistent_autoloaded_singleton(object):
     implementation.
 
     """
+
     def __init__(
-            self,
-            *,
-            persist_at_shutdown: PersistAtShutdown = PersistAtShutdown.IF_NOT_LOADED):
+        self,
+        *,
+        persist_at_shutdown: PersistAtShutdown = PersistAtShutdown.IF_NOT_LOADED,
+    ):
         self.persist_at_shutdown = persist_at_shutdown
         self.instance = None
 
@@ -148,19 +148,21 @@ class persistent_autoloaded_singleton(object):
                 logger.debug(f'Attempting to instantiate {cls.__name__} directly.')
                 self.instance = cls(*args, **kwargs)
             else:
-                logger.debug(f'Class {cls.__name__} was loaded from persisted state successfully.')
+                logger.debug(
+                    f'Class {cls.__name__} was loaded from persisted state successfully.'
+                )
                 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
-                    )
+            if self.persist_at_shutdown is PersistAtShutdown.ALWAYS or (
+                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
+
         return _load