check for running event loop

Author: dot-agi

tokencost/constants.py

@@ -62,8 +62,13 @@ def refresh_prices(write_file=True):
     """Synchronous wrapper for update_token_costs that optionally writes to model_prices.json."""
     import asyncio
     try:
-        # Run the async function in a new event loop
-        updated_costs = asyncio.run(update_token_costs())
+        # Check if an event loop is already running
+        try:
+            loop = asyncio.get_running_loop()
+            updated_costs = loop.run_until_complete(update_token_costs())
+        except RuntimeError:
+            # No running loop, safe to use asyncio.run
+            updated_costs = asyncio.run(update_token_costs())
 
         # Write to file if requested
         if write_file: