Update app.py

app.py

@@ -169,6 +169,8 @@ def main():
       #if (bert_tokenizer is None):
       #  bert_tokenizer, bert_model  = load_bert_model(model_name)
       st.info("Top k = " + str(top_k))
+      if (model_name is None):
+        model_name = "ajitrajasekharan/biomedcal"
       st.info("Model name = " + model_name)