quick fixes

src/crewai/flow/flow.py

@@ -149,15 +149,16 @@ class Flow(Generic[T], metaclass=FlowMeta):
     _router_paths: Dict[str, List[str]] = {}
     initial_state: Union[Type[T], T, None] = None
 
-    def __class_getitem__(cls, item):
+    def __class_getitem__(cls, item: Type[T]) -> Type["Flow"]:
         class _FlowGeneric(cls):
-            _initial_state_T = item
+            _initial_state_T: Type[T] = item
 
+        _FlowGeneric.__name__ = f"{cls.__name__}[{item.__name__}]"
         return _FlowGeneric
 
-    def __init__(self):
+    def __init__(self) -> None:
         self._methods: Dict[str, Callable] = {}
-        self._state = self._create_initial_state()
+        self._state: T = self._create_initial_state()
         self._completed_methods: Set[str] = set()
         self._pending_and_listeners: Dict[str, Set[str]] = {}
         self._method_outputs: List[Any] = []  # List to store all method outputs
@@ -212,11 +213,11 @@ async def kickoff(self) -> Any:
         else:
             return None  # Or raise an exception if no methods were executed
 
-    async def _execute_start_method(self, start_method: str):
+    async def _execute_start_method(self, start_method: str) -> None:
         result = await self._execute_method(self._methods[start_method])
         await self._execute_listeners(start_method, result)
 
-    async def _execute_method(self, method: Callable, *args, **kwargs):
+    async def _execute_method(self, method: Callable, *args: Any, **kwargs: Any) -> Any:
         result = (
             await method(*args, **kwargs)
             if asyncio.iscoroutinefunction(method)
@@ -225,7 +226,7 @@ async def _execute_method(self, method: Callable, *args, **kwargs):
         self._method_outputs.append(result)  # Store the output
         return result
 
-    async def _execute_listeners(self, trigger_method: str, result: Any):
+    async def _execute_listeners(self, trigger_method: str, result: Any) -> None:
         listener_tasks = []
 
         if trigger_method in self._routers:
@@ -253,7 +254,7 @@ async def _execute_listeners(self, trigger_method: str, result: Any):
         # Run all listener tasks concurrently and wait for them to complete
         await asyncio.gather(*listener_tasks)
 
-    async def _execute_single_listener(self, listener: str, result: Any):
+    async def _execute_single_listener(self, listener: str, result: Any) -> None:
         try:
             method = self._methods[listener]
             sig = inspect.signature(method)
@@ -277,7 +278,7 @@ async def _execute_single_listener(self, listener: str, result: Any):
 
             traceback.print_exc()
 
-    def plot(self, filename: str = "crewai_flow"):
+    def plot(self, filename: str = "crewai_flow") -> None:
         self._telemetry.flow_plotting_span(
             self.__class__.__name__, list(self._methods.keys())
         )