Update app/sentiment.py

app/sentiment.py

@@ -9,10 +9,10 @@ import asyncio
 import logging
 import os
 # ====================================================================
-#                       FIX APPLIED HERE (1 of 2)
+#                       FINAL FIX APPLIED HERE
 # ====================================================================
-# Import Union for Python 3.9 compatibility
-from typing import TypedDict, Union
+# Import Optional and Union for Python 3.9 compatibility.
+from typing import TypedDict, Union, Optional
 # ====================================================================
 
 
@@ -27,12 +27,8 @@ logger = logging.getLogger(__name__)
 class SentimentResult(TypedDict):
     id: int
     text: str
-    # ====================================================================
-    #                       FIX APPLIED HERE (2 of 2)
-    # ====================================================================
-    # Changed `str | float` to `Union[str, float]`
+    # Using Union for Python 3.9 compatibility
     result: dict[str, Union[str, float]]
-    # ====================================================================
 
 
 # --- Main Class: SentimentAnalyzer ---
@@ -46,7 +42,12 @@ class SentimentAnalyzer:
 
     HF_API_URL = "https://api-inference.huggingface.co/models/distilbert-base-uncased-finetuned-sst-2-english"
 
-    def __init__(self, client: httpx.AsyncClient, api_token: str | None = None):
+    # ====================================================================
+    #                       FINAL FIX APPLIED HERE
+    # ====================================================================
+    # Changed `str | None` to `Optional[str]` for Python 3.9 compatibility.
+    def __init__(self, client: httpx.AsyncClient, api_token: Optional[str] = None):
+    # ====================================================================
         """
         Initializes the SentimentAnalyzer.
 
@@ -116,7 +117,7 @@ class SentimentAnalyzer:
         }
         await self.result_queue.put(payload)
 
-    async def stream_results(self) -> SentimentResult:
+    async def stream_results(self): # Type hint removed for simplicity, was -> SentimentResult
         """
         An async generator that yields new results as they become available.
         This is the consumer part of the pattern.