Update app.py

app.py

@@ -118,8 +118,10 @@ renamed_audio_file = None
 
 model_configurations = {}
 
+
 @app.on_event("startup")
 async def load_model_data():
+    global onnx_models  # Make onnx_models available globally
     # Load data for all models in the directory upon startup
     sys.path.append('./content/piper/src/python')
     models_path = "./content/piper/src/python"
@@ -133,6 +135,7 @@ async def load_model_data():
 
     # Collect data for all models in the directory and populate model_configurations
     model_names = detect_onnx_models(models_path)
+    onnx_models = model_names  # Populate onnx_models here
     for model_name in model_names:
         # Load the configuration data for each model (including speaker_id_map)
         config = load_model_configuration(model_name)