use session for perspective

app.py

@@ -1,7 +1,6 @@
 import requests
 from collections import Counter
 from requests.adapters import HTTPAdapter, Retry
-import multiprocessing
 import os
 import time
 import logging
@@ -23,7 +22,7 @@ logging.basicConfig(level=logging.INFO, format="%(asctime)s - %(name)s - %(level
 
 
 session = requests.Session()
-retries = Retry(total=5, backoff_factor=1, status_forcelist=[502, 503, 504])
+retries = Retry(total=5, backoff_factor=2, status_forcelist=[502, 503, 504])
 session.mount('http://', HTTPAdapter(max_retries=retries))
 
 
@@ -183,7 +182,7 @@ def call_perspective_api(texts_df, column_name, nested_column_name, dataset, con
         }
         time.sleep(1)
         try:
-            req_response = requests.post(PERSPECTIVE_URL, json=data, headers=headers)
+            req_response = session.post(PERSPECTIVE_URL, json=data, headers=headers)
         except Exception as e:
             print(e)
             return req_att_scores