Update date parsing

mathtext_fastapi/nlu.py

@@ -1,6 +1,7 @@
 from collections.abc import Mapping
 from logging import getLogger
 import datetime as dt
+from dateutil.parser import isoparse
 import re
 
 from fuzzywuzzy import fuzz
@@ -141,7 +142,7 @@ def run_intent_classification(message_text):
 
 def payload_is_valid(payload_object):
     """
-    >>> payload_is_valid({'author_id': '+821031323138', 'author_type': 'OWNER', 'contact_uuid': '49d42557-7a64-42fc-98fb-794061f37cf9', 'message_body': 'thirty one', 'message_direction': 'inbound', 'message_id': 'ABEGghAxMjE4Ags-sGJ_JArMAnJBnA', 'message_inserted_at': '2022-07-05T04:00:34.03352Z', 'message_updated_at': '2023-04-06T10:08:23.745072Z'})
+    >>> payload_is_valid({'author_id': '+5555555', 'author_type': 'OWNER', 'contact_uuid': '3246-43ad-faf7qw-zsdhg-dgGdg', 'message_body': 'thirty one', 'message_direction': 'inbound', 'message_id': 'SDFGGwafada-DFASHA4aDGA', 'message_inserted_at': '2022-07-05T04:00:34.03352Z', 'message_updated_at': '2023-04-06T10:08:23.745072Z'})
     True
     """
     return (
@@ -158,13 +159,13 @@ def payload_is_valid(payload_object):
         isinstance(payload_object.get('message_inserted_at'), str) and
         isinstance(payload_object.get('message_updated_at'), str) and
         isinstance(
-            dt.datetime.fromisoformat(payload_object.get('message_inserted_at')),
+            isoparse(payload_object.get('message_inserted_at')),
             dt.datetime
         ) and 
         isinstance(
-            dt.datetime.fromisoformat(payload_object.get('message_updated_at')),
+            isoparse(payload_object.get('message_updated_at')),
             dt.datetime
-        )
+        )        
     )