Enhanced error handling in fetch_stocks.py

Stock-Analysis/fetch_stocks.py

@@ -6,20 +6,46 @@ class StockFetcher:
 
     @staticmethod
     def fetch_stock_data(stock):
-        """Fetch stock data from Yahoo Finance."""
+        """Fetch stock data from Yahoo Finance with improved error handling."""
         try:
             ticker = yf.Ticker(stock)
             info = ticker.info
-            if not info or 'recommendationMean' not in info:
-                raise ValueError("Recommendation data is missing")
+
+            # Check if info returned anything
+            if not info:
+                raise ValueError("Empty response received from Yahoo Finance API")
+
+            # Check if recommendation data exists
+            if 'recommendationMean' not in info:
+                raise KeyError("recommendationMean field missing in API response")
+
             rate = info["recommendationMean"]
             return (rate, stock)
+
         except ValueError as e:
-            logging.getLogger(__name__).error(f"Value error for stock {stock}: {e}")
+            logging.getLogger(__name__).error(
+                f"[ValueError] Unable to fetch data for '{stock}': {e}. "
+                f"Possible causes: Invalid stock symbol or empty API response."
+            )
+
         except KeyError as e:
-            logging.getLogger(__name__).error(f"Key error for stock {stock}: {e}", exc_info=True)
+            logging.getLogger(__name__).error(
+                f"[KeyError] Missing expected data for '{stock}': {e}. "
+                f"The API might have changed or the stock does not provide recommendation data.",
+                exc_info=True
+            )
+
         except URLError as e:
-            logging.getLogger(__name__).error(f"Network error while fetching data for {stock}: {e}")
+            logging.getLogger(__name__).error(
+                f"[URLError] Network issue while fetching '{stock}': {e}. "
+                f"Please check your internet connection or try again later."
+            )
+
         except Exception as e:
-            logging.getLogger(__name__).error(f"Unexpected error while fetching data for {stock}: {e}", exc_info=True)
-        return None
+            logging.getLogger(__name__).error(
+                f"[Unexpected Error] Failed to fetch '{stock}': ({type(e).__name__}) {e}",
+                exc_info=True
+            )
+
+        return None
+