Use 3.9 syntax for now to keep mypy happy

modelskill/comparison/_comparison.py

@@ -1259,13 +1259,16 @@ def save(self, filename: Union[str, Path], name: Optional[str] = None) -> None:
         """
         ext = Path(filename).suffix
 
-        match ext:
-            case ".db":
-                self._save_to_duckdb(filename, name)
-            case ".nc":
-                self._save_to_netcdf(filename)
-            case _:
-                raise NotImplementedError(f"Unknown extension: {ext}")
+        # match ext:
+        #    case ".db":
+        if ext == ".db":
+            self._save_to_duckdb(filename, name)
+        elif ext == ".nc":
+            #    case ".nc":
+            self._save_to_netcdf(filename)
+        else:
+            #    case _:
+            raise NotImplementedError(f"Unknown extension: {ext}")
 
     def _save_to_netcdf(self, filename) -> None:
         ds = self.data
@@ -1353,13 +1356,16 @@ def load(filename: Union[str, Path], name: Optional[str] = None) -> "Comparer":
         # get extension
         ext = Path(filename).suffix
 
-        match ext:
-            case ".db":
-                return Comparer._load_from_duckdb(filename, name)
-            case ".nc":
-                return Comparer._load_from_netcdf(filename)
-            case _:
-                raise NotImplementedError(f"Unknown extension: {ext}")
+        # match ext:
+        #    case ".db":
+        if ext == ".db":
+            return Comparer._load_from_duckdb(filename, name)
+        elif ext == ".nc":
+            #    case ".nc":
+            return Comparer._load_from_netcdf(filename)
+        else:
+            #    case _:
+            raise NotImplementedError(f"Unknown extension: {ext}")
 
     @staticmethod
     def _load_from_duckdb(filename, name: Optional[str]) -> "Comparer":

pyproject.toml

@@ -79,7 +79,7 @@ ignore = ["E501"]
 select = ["E4", "E7", "E9", "F", "D200", "D205"]
 
 [tool.mypy]
-python_version = "3.10"
+python_version = "3.9"
 ignore_missing_imports = true
 warn_unreachable = false
 no_implicit_optional = true