Fix myPy issues

Author: Ornella33

server/app/interfaces/discovery.py

@@ -16,7 +16,7 @@
 
 
 class DiscoveryStore:
-    def __init__(self):
+    def __init__(self) -> None:
         self.aas_id_to_asset_ids: Dict[model.Identifier, Set[model.SpecificAssetId]] = {}
         self.asset_id_to_aas_ids: Dict[model.SpecificAssetId, Set[model.Identifier]] = {}
 

server/app/interfaces/registry.py

@@ -66,12 +66,12 @@ def _get_all_aas_descriptors(self, request: "Request") -> Tuple[
             server_model.AssetAdministrationShellDescriptor
         )
 
-        asset_kind = request.args.get("assetKind")
-        if asset_kind is not None:
+        asset_kind_str = request.args.get("assetKind")
+        if asset_kind_str is not None:
             try:
-                asset_kind = model.AssetKind[asset_kind]
+                asset_kind = model.AssetKind[asset_kind_str]
             except KeyError:
-                raise BadRequest(f"Invalid assetKind '{asset_kind}', must be one of {list(model.AssetKind.__members__)}")
+                raise BadRequest(f"Invalid assetKind '{asset_kind_str}', must be one of {list(model.AssetKind.__members__)}")
             descriptors = filter(
                 lambda desc: desc.asset_kind == asset_kind,
                 descriptors