Use exceptiongroup library instead of trio.MultiError

Author: CoolCat467

pyproject.toml

@@ -38,7 +38,8 @@ dependencies = [
     "quart~=0.19.4",
     "quart-trio~=0.11.1",
     "trio~=0.23.1",
-    "Werkzeug~=3.0.1"
+    "Werkzeug~=3.0.1",
+    'exceptiongroup >= 1.2.0; python_version < "3.11"',
 ]
 
 [tool.setuptools.dynamic]

src/sanescansrv/server.py

@@ -65,10 +65,8 @@
 
 Handler = TypeVar("Handler", bound=Callable[..., Awaitable[object]])
 
-if sys.version_info >= (3, 11):
-    BaseExceptionGroup_ = BaseExceptionGroup
-else:
-    BaseExceptionGroup_ = trio.MultiError
+if sys.version_info < (3, 11):
+    from exceptiongroup import BaseExceptionGroup
 
 
 def stop_sane() -> None:
@@ -642,7 +640,7 @@ def serve_scanner(
         print(f"Serving on http://{location}\n(CTRL + C to quit)")
 
         trio.run(serve_async, app, config_obj)
-    except BaseExceptionGroup_ as exc:
+    except BaseExceptionGroup as exc:
         caught = False
         for ex in exc.exceptions:
             if isinstance(ex, KeyboardInterrupt):