Exclude private fields from the result of Event.to_json (#56)

nuclio_sdk/event.py

@@ -183,7 +183,11 @@ def __init__(
         self.offset = offset or 0
 
     def to_json(self):
-        obj = vars(self).copy()
+        obj = {}
+        for field_name, field_value in vars(self).items():
+            # exclude private fields
+            if not field_name.startswith("_"):
+                obj[field_name] = field_value
         obj["trigger"] = {
             "kind": self.trigger.kind,
             "name": self.trigger.name,

nuclio_sdk/test/test_event.py

@@ -91,3 +91,11 @@ def _deserialize_event(self, event):
         return nuclio_sdk.event.Event.deserialize(
             json.dumps(event_json), nuclio_sdk.event.EventDeserializerKinds.json
         )
+
+    def test_event_to_json_excludes_private_fields(self):
+        request_body = "str-body"
+        event = nuclio_sdk.Event(body=request_body)
+        event._private_field = 1
+        event_obj = json.loads(event.to_json())
+        assert "body" in event_obj
+        assert "_private_field" not in event_obj