Rewritten financial data fetching so it finally works again.

fetch_close_price.py

@@ -0,0 +1,38 @@
+# fetch_close_price.py
+# This script does ONLY ONE THING: gets the closing price using the stable Ticker.history() method.
+import sys
+import json
+import yfinance as yf
+import pandas as pd
+import logging
+
+# Suppress verbose yfinance logging in this isolated process
+logging.getLogger("yfinance").setLevel(logging.CRITICAL)
+
+if __name__ == "__main__":
+    if len(sys.argv) < 2:
+        # Exit with an error code if no ticker is provided
+        sys.exit(1)
+    
+    ticker_symbol = sys.argv[1]
+    
+    try:
+        # Instead of the global yf.download(), we use the Ticker object's .history() method.
+        # This uses a different internal code path that we have proven is stable.
+        ticker = yf.Ticker(ticker_symbol)
+        data = ticker.history(period="2d", auto_adjust=False)
+        # --- END OF FIX ---
+        
+        closing_price = None
+        if not data.empty:
+            last_close_raw = data['Close'].iloc[-1]
+            if pd.notna(last_close_raw):
+                closing_price = float(last_close_raw)
+        
+        # On success, print JSON to stdout and exit cleanly
+        print(json.dumps({"closing_price": closing_price}))
+        sys.exit(0)
+    except Exception:
+        # If any error occurs, print an empty JSON and exit with an error code
+        print(json.dumps({"closing_price": None}))
+        sys.exit(1)