Move static method load outside

src/plumpy/persistence.py

@@ -35,8 +35,33 @@
     from .processes import Process
 
 
+class LoadSaveContext:
+    def __init__(self, loader: Optional[loaders.ObjectLoader] = None, **kwargs: Any) -> None:
+        self._values = dict(**kwargs)
+        self.loader = loader
+
+    def __getattr__(self, item: str) -> Any:
+        try:
+            return self._values[item]
+        except KeyError:
+            raise AttributeError(f"item '{item}' not found")
+
+    def __iter__(self) -> Iterable[Any]:
+        return self._value.__iter__()
+
+    def __contains__(self, item: Any) -> bool:
+        return self._values.__contains__(item)
+
+    def copyextend(self, **kwargs: Any) -> 'LoadSaveContext':
+        """Add additional information to the context by making a copy with the new values"""
+        extended = self._values.copy()
+        extended.update(kwargs)
+        loader = extended.pop('loader', self.loader)
+        return LoadSaveContext(loader=loader, **extended)
+
+
 class Bundle(dict):
-    def __init__(self, savable: 'Savable', save_context: Optional['LoadSaveContext'] = None, dereference: bool = False):
+    def __init__(self, savable: 'Savable', save_context: LoadSaveContext | None = None, dereference: bool = False):
         """
         Create a bundle from a savable.  Optionally keep information about the
         class loader that can be used to load the classes in the bundle.
@@ -52,7 +77,7 @@ class loader that can be used to load the classes in the bundle.
         else:
             self.update(savable.save(save_context))
 
-    def unbundle(self, load_context: Optional['LoadSaveContext'] = None) -> 'Savable':
+    def unbundle(self, load_context: LoadSaveContext | None = None) -> 'Savable':
         """
         This method loads the class of the object and calls its recreate_from
         method passing the positional and keyword arguments.
@@ -61,7 +86,29 @@ def unbundle(self, load_context: Optional['LoadSaveContext'] = None) -> 'Savable
         :return: An instance of the Savable
 
         """
-        return Savable.load(self, load_context)
+        return load(self, load_context)
+
+
+def load(saved_state: SAVED_STATE_TYPE, load_context: LoadSaveContext | None = None) -> 'Savable':
+    """
+    Load a `Savable` from a saved instance state.  The load context is a way of passing
+    runtime data to the object being loaded.
+
+    :param saved_state: The saved state
+    :param load_context: Additional runtime state that can be passed into when loading.
+        The type and content (if any) is completely user defined
+    :return: The loaded Savable instance
+
+    """
+    load_context = _ensure_object_loader(load_context, saved_state)
+    assert load_context.loader is not None  # required for type checking
+    try:
+        class_name = Savable._get_class_name(saved_state)
+        load_cls = load_context.loader.load_object(class_name)
+    except KeyError:
+        raise ValueError('Class name not found in saved state')
+    else:
+        return load_cls.recreate_from(saved_state, load_context)
 
 
 _BUNDLE_TAG = '!plumpy:Bundle'
@@ -392,31 +439,6 @@ def _ensure_object_loader(context: Optional['LoadSaveContext'], saved_state: SAV
     return context.copyextend(loader=loader)
 
 
-class LoadSaveContext:
-    def __init__(self, loader: Optional[loaders.ObjectLoader] = None, **kwargs: Any) -> None:
-        self._values = dict(**kwargs)
-        self.loader = loader
-
-    def __getattr__(self, item: str) -> Any:
-        try:
-            return self._values[item]
-        except KeyError:
-            raise AttributeError(f"item '{item}' not found")
-
-    def __iter__(self) -> Iterable[Any]:
-        return self._value.__iter__()
-
-    def __contains__(self, item: Any) -> bool:
-        return self._values.__contains__(item)
-
-    def copyextend(self, **kwargs: Any) -> 'LoadSaveContext':
-        """Add additional information to the context by making a copy with the new values"""
-        extended = self._values.copy()
-        extended.update(kwargs)
-        loader = extended.pop('loader', self.loader)
-        return LoadSaveContext(loader=loader, **extended)
-
-
 META: str = '!!meta'
 META__CLASS_NAME: str = 'class_name'
 META__OBJECT_LOADER: str = 'object_loader'
@@ -465,28 +487,6 @@ def load_instance_state(self, saved_state: SAVED_STATE_TYPE, load_context: Optio
             for member in self._auto_persist:
                 setattr(self, member, self._get_value(saved_state, member, load_context))
 
-    @staticmethod
-    def load(saved_state: SAVED_STATE_TYPE, load_context: Optional[LoadSaveContext] = None) -> 'Savable':
-        """
-        Load a `Savable` from a saved instance state.  The load context is a way of passing
-        runtime data to the object being loaded.
-
-        :param saved_state: The saved state
-        :param load_context: Additional runtime state that can be passed into when loading.
-            The type and content (if any) is completely user defined
-        :return: The loaded Savable instance
-
-        """
-        load_context = _ensure_object_loader(load_context, saved_state)
-        assert load_context.loader is not None  # required for type checking
-        try:
-            class_name = Savable._get_class_name(saved_state)
-            load_cls = load_context.loader.load_object(class_name)
-        except KeyError:
-            raise ValueError('Class name not found in saved state')
-        else:
-            return load_cls.recreate_from(saved_state, load_context)
-
     @super_check
     def save_instance_state(self, out_state: SAVED_STATE_TYPE, save_context: Optional[LoadSaveContext]) -> None:
         self._ensure_persist_configured()