Add stubs for the dynamic container

src/dependency_injector/containers.pyi

@@ -0,0 +1,18 @@
+from typing import Type, Dict, Tuple, Optional, Any, Union
+
+from .providers import Provider
+
+
+class DynamicContainer:
+    provider_type: Type[Provider] = Provider
+    providers: Dict[str, Provider]
+    overridden: Tuple[Provider]
+    def __init__(self) -> None: ...
+    def __deepcopy__(self, memo: Optional[Dict[str, Any]]) -> Provider: ...
+    def __setattr__(self, name: str, value: Union[Provider, Any]) -> None: ...
+    def __delattr__(self, name: str) -> None: ...
+    def set_providers(self, **providers: Provider): ...
+    def override(self, overriding: DynamicContainer) -> None: ...
+    def override_providers(self, **overriding_providers: Provider) -> None: ...
+    def reset_last_overriding(self) -> None: ...
+    def reset_override(self) -> None: ...

tests/typing/dynamic_container.py

@@ -0,0 +1,18 @@
+from dependency_injector import containers, providers
+
+
+# Test 1: to check setattr
+container1 = containers.DynamicContainer()
+container1.abc = providers.Provider()
+
+# Test 2: to check override()
+container2 = containers.DynamicContainer()
+container2.override(containers.DynamicContainer())
+
+# Test 3: to check override_providers()
+container3 = containers.DynamicContainer()
+container3.override_providers(a=providers.Provider())
+
+# Test 4: to check set_providers()
+container4 = containers.DynamicContainer()
+container4.set_providers(a=providers.Provider())