finalize simple stream app

app_simple_stream/app/main.py

@@ -16,7 +16,7 @@ app = FastAPI()
 async def generate_stream(input_data: schemas.BaseModel, runnable: Runnable, callbacks: List[BaseCallbackHandler]=[]):
     for output in runnable.stream(input_data.dict(), config={"callbacks": callbacks}):
         data = WellKnownLCSerializer().dumps(output).decode("utf-8") # Decode data
-        yield {'data': data, "event": "data"} 
+        yield {'data': data, "event": "data"} # Use yield to create generator, which can pause the execution and return a value
     
     yield {"event": "end"}