Update app.py

app.py

@@ -4,8 +4,7 @@ import torch
 import string
 
 
-bert_tokenizer = None
-bert_model = None
+
 
 from transformers import BertTokenizer, BertForMaskedLM
 
@@ -105,6 +104,8 @@ print(top_k)
     
   #  with st.spinner("Computing"):
 try:
+      bert_tokenizer = None
+      bert_model = None
             
       model_name = st.sidebar.selectbox(label='Select Model to Apply',  options=['ajitrajasekharan/biomedical', 'bert-base-cased','bert-large-cased','microsoft/BiomedNLP-PubMedBERT-base-uncased-abstract-fulltext','allenai/scibert_scivocab_cased'], index=0,  key = "model_name")
       option = st.selectbox(