update CHANGELOG.md and add comment to BoundedAttributes __deepcopy__ implementation

herin049 · herin049 · commit 1ca84f7d483d · 2026-03-13T13:39:36.000-04:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -26,7 +26,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#4973](https://github.com/open-telemetry/opentelemetry-python/pull/4973))
 - `opentelemetry-exporter-prometheus`: Fix metric name prefix
   ([#4895](https://github.com/open-telemetry/opentelemetry-python/pull/4895))
-- `opentelemetry-api`, `opentelemetry-sdk`: Add deepcopy support for `BoundedAttributes`
+- `opentelemetry-api`, `opentelemetry-sdk`: Add deepcopy support for `BoundedAttributes` and `BoundedList`
   ([#4934](https://github.com/open-telemetry/opentelemetry-python/pull/4934))
 
 ## Version 1.40.0/0.61b0 (2026-03-04)
diff --git a/opentelemetry-api/src/opentelemetry/attributes/__init__.py b/opentelemetry-api/src/opentelemetry/attributes/__init__.py
@@ -328,6 +328,8 @@ def __deepcopy__(self, memo: dict) -> "BoundedAttributes":
         )
         memo[id(self)] = copy_
         with self._lock:
+            # Assign _dict directly to avoid re-cleaning already clean values
+            # and to bypass the immutability guard in __setitem__
             copy_._dict = copy.deepcopy(self._dict, memo)
             copy_.dropped = self.dropped
         return copy_

Original file line number	Diff line number	Diff line change
`@@ -328,6 +328,8 @@ def __deepcopy__(self, memo: dict) -> "BoundedAttributes":`
`328`	`328`	`)`
`329`	`329`	`memo[id(self)] = copy_`
`330`	`330`	`with self._lock:`
	`331`	`+ # Assign _dict directly to avoid re-cleaning already clean values`
	`332`	`+ # and to bypass the immutability guard in __setitem__`
`331`	`333`	`copy_._dict = copy.deepcopy(self._dict, memo)`
`332`	`334`	`copy_.dropped = self.dropped`
`333`	`335`	`return copy_`