Document None attribute values as undefined behavior (open-telemetry#1361)

srikanthccv · web-flow · commit 2701445bd4c5 · 2020-11-08T16:05:50.000-08:00
diff --git a/opentelemetry-api/src/opentelemetry/trace/span.py b/opentelemetry-api/src/opentelemetry/trace/span.py
@@ -38,6 +38,8 @@ def set_attribute(self, key: str, value: types.AttributeValue) -> None:
         """Sets an Attribute.
 
         Sets a single Attribute with the key and value passed as arguments.
+
+        Note: The behavior of `None` value attributes is undefined, and hence strongly discouraged.
         """
 
     @abc.abstractmethod
