Using typing-extensions for 3.9 support of @OverRide

pyproject.toml

@@ -32,6 +32,7 @@ dependencies = [
     'kiwipy[rmq]~=0.8.5',
     'nest_asyncio~=1.5,>=1.5.1',
     'pyyaml~=6.0',
+    'typing-extensions~=4.12'
 ]
 
 [project.urls]

src/plumpy/persistence.py

@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*-
+from __future__ import annotations
+
 import abc
 import asyncio
 import collections

src/plumpy/process_states.py

@@ -17,10 +17,10 @@
     Union,
     cast,
     final,
-    override,
 )
 
 import yaml
+from typing_extensions import override
 from yaml.loader import Loader
 
 from plumpy.message import MessageBuilder, MessageType

src/plumpy/processes.py

@@ -285,20 +285,20 @@ def recreate_from(
         if 'loop' in load_context:
             proc._loop = load_context.loop
         else:
-            _LOGGER.warning(f'cannot find `loop` store in load_context, use default event loop')
+            _LOGGER.warning('cannot find `loop` store in load_context, use default event loop')
             proc._loop = asyncio.get_event_loop()
 
         proc._state = proc.recreate_state(saved_state['_state'])
 
         if 'coordinator' in load_context:
             proc._coordinator = load_context.coordinator
         else:
-            _LOGGER.warning(f'cannot find `coordinator` store in load_context')
+            _LOGGER.warning('cannot find `coordinator` store in load_context')
 
         if 'logger' in load_context:
             proc._logger = load_context.logger
         else:
-            _LOGGER.warning(f'cannot find `logger` store in load_context')
+            _LOGGER.warning('cannot find `logger` store in load_context')
 
         # Need to call this here as things downstream may rely on us having the runtime variable above
         persistence.load_auto_persist_params(proc, saved_state, load_context)