Add serviceContainer.py

serviceContainer.py

@@ -0,0 +1,19 @@
+from dataclasses import dataclass
+from typing import Mapping, Type, TypeVar
+
+T = TypeVar("T")
+
+@dataclass
+class ServiceContainer:
+    _dependencies: Mapping[str, T] = {}
+
+    def register(self, name: str, instance: T) -> None:
+        self._dependencies[name] = instance
+
+    def retrieve(self, name: str, _: Type[T]) -> T:
+        return self._dependencies[name]
+
+
+
+# in python 3.12 we can use retrieve[T] :)
+# https://docs.python.org/3/reference/compound_stmts.html#type-params