change to None

feature_extraction.py

@@ -461,9 +461,9 @@ def collect_data(url: str, is_malicious: bool):
         age_of_domain_value = age_of_domain(w)
     except Exception as e:
         print('whois error: ' + str(e))
-        domain_registeration_length_value = -1
-        abnormal_url_value = 1
-        age_of_domain_value = -1
+        domain_registeration_length_value = None
+        abnormal_url_value = None
+        age_of_domain_value = None
     
     
     print(f"{url} took {time.time() - start_time} seconds to complete")