Add JSON serializer for datetime.

tests/test_api.py

@@ -1,5 +1,7 @@
 import time
+import datetime
 import os
+
 import todoist
 
 
@@ -276,7 +278,8 @@ def test_item(api_token):
     assert 'UpdatedItem1' in [p['content'] for p in api.state['Items']]
     assert api.items.get_by_id(item1['id']) == item1
 
-    item2 = api.items.add('Item2', inbox['id'])
+    date_string = datetime.datetime(2038, 01, 19, 03, 14, 07)
+    item2 = api.items.add('Item2', inbox['id'], date_string=date_string)
     api.commit()
     api.items.sync()
 

todoist/api.py

@@ -280,6 +280,11 @@ def _post(self, call, url=None, **kwargs):
         except ValueError:
             return response.text
 
+    def _json_serializer(self, obj):
+        import datetime
+        if isinstance(obj, datetime.datetime):
+            return obj.isoformat()
+
     # Sync
     def generate_uuid(self):
         """
@@ -294,7 +299,8 @@ def sync(self, commands=None, **kwargs):
         """
         data = {
             'token': self.token,
-            'commands': json.dumps(commands or [], separators=',:'),
+            'commands': json.dumps(commands or [], separators=',:',
+                                   default=self._json_serializer),
             'day_orders_timestamp': self.state['DayOrdersTimestamp'],
         }
         if not commands:
@@ -394,7 +400,8 @@ def query(self, queries, **kwargs):
         """
         Performs date queries and other searches, and returns the results.
         """
-        params = {'queries': json.dumps(queries, separators=',:'),
+        params = {'queries': json.dumps(queries, separators=',:',
+                                        default=self._json_serializer),
                   'token': self.token}
         params.update(kwargs)
         return self._get('query', params=params)