Update app.py

app.py

@@ -13,7 +13,7 @@ available_models = {
 # Create a Gradio interface with audio file and text inputs
 def classify_toxicity(audio_file, text_file, selected_model):
     # Transcribe the audio file using Whisper ASR
-    if audio_file != null:
+    if audio_file != None:
         whisper_module = evaluate.load("whisper")
         transcription_results = whisper_module.compute(uploaded=audio_file)