Ensure @override is added to every overriding method/property

experimentation.py

@@ -0,0 +1,15 @@
+from typing import override
+
+
+class Base:
+    def some_method(self) -> str:
+        return "This is a method from the Base class."
+
+
+class Sub(Base):
+    def some_method(self) -> str:
+        return "This is a method from the Sub class."
+
+    @override
+    def some_methods(self) -> str:
+        return "This is a method from the Sub class."

pyproject.toml

@@ -46,6 +46,8 @@ testing = [
     "typing_extensions"
 ]
 
+[tool.mypy]
+enable_error_code = "explicit-override"
 
 [tool.setuptools.packages.find]
 where = ["src"]