Update app.py

app.py

@@ -155,7 +155,9 @@ def initialize_database(list_file_obj, chunk_size, chunk_overlap, progress=gr.Pr
     collection_name = collection_name.replace(" ","-")
     # Remove periods
     collection_name = collection_name.replace(".","_") 
-
+    octets = collection_name.split('.')
+    if len(octets) != 4 or any(not 0 <= int(octet) <= 255 for octet in octets):
+        print('ipv4 address')  # Not a valid IPv4 address
     ## Limit lenght to 50 characters
     collection_name = collection_name[:50]
     ## Enforce start and end as alphanumeric character