comments

Signed-off-by: emdneto <[email protected]>

Author: emdneto

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+- typecheck: add sdk/resources and drop mypy
+  ([#4578](https://github.com/open-telemetry/opentelemetry-python/pull/4578))
+
 ## Version 1.33.0/0.54b0 (2025-05-09)
 
 - Fix intermittent `Connection aborted` error when using otlp/http exporters

opentelemetry-sdk/src/opentelemetry/sdk/resources/__init__.py

@@ -303,7 +303,7 @@ def __hash__(self) -> int:
     def to_json(self, indent: Optional[int] = 4) -> str:
         return dumps(
             {
-                "attributes": dict(self._attributes),
+                "attributes": dict(self.attributes),
                 "schema_url": self._schema_url,
             },
             indent=indent,