fix(openai): add context manager support to traced stream wrappers#120

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Abhijeet Prasad (AbhiPrasad) merged 2 commits into from
Mar 24, 2026
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fix(openai): add context manager support to traced stream wrappers #120

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fix(openai): add context manager support to traced stream wrappers
AbhiPrasad Mar 23, 2026
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AbhiPrasad Mar 24, 2026
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10 changes: 10 additions & 0 deletions py/noxfile.py
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Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -210,6 +210,16 @@ def test_openai(session, version):
_run_core_tests(session)


@nox.session()
def test_openai_http2_streaming(session):
_install_test_deps(session)
_install(session, "openai")
# h2 is isolated to this session because it's only needed to force the
# HTTP/2 LegacyAPIResponse streaming path used by the regression test.
session.install("h2")
_run_tests(session, f"{WRAPPER_DIR}/test_openai_http2.py")


@nox.session()
def test_openrouter(session):
"""Test wrap_openai with OpenRouter. Requires OPENROUTER_API_KEY env var."""
Expand Down
38 changes: 32 additions & 6 deletions py/src/braintrust/oai.py
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -19,8 +19,14 @@

class NamedWrapper:
def __init__(self, wrapped: Any):
# Keep the legacy mangled attribute for existing wrapped-client checks
# that introspect `_NamedWrapper__wrapped` directly.
self.__wrapped = wrapped

@property
def _wrapped(self) -> Any:
return self.__wrapped

def __getattr__(self, name: str) -> Any:
return getattr(self.__wrapped, name)

Expand All@@ -33,8 +39,8 @@ def __init__(self, response: Any):

async def __aenter__(self):
if hasattr(self._response, "__aenter__"):
return await self._response.__aenter__()
return self._response
await self._response.__aenter__()
return self

async def __aexit__(self, exc_type, exc_val, exc_tb):
if hasattr(self._response, "__aexit__"):
Expand DownExpand Up@@ -188,7 +194,7 @@ def gen():
span.end()

should_end = False
return gen()
return _TracedStream(raw_response, gen())
else:
log_response = _try_to_dict(raw_response)
metrics = _parse_metrics_from_usage(log_response.get("usage", {}))
Expand DownExpand Up@@ -244,7 +250,7 @@ async def gen():

should_end = False
streamer = gen()
return AsyncResponseWrapper(streamer)
return _AsyncTracedStream(raw_response, streamer)
else:
log_response = _try_to_dict(raw_response)
metrics = _parse_metrics_from_usage(log_response.get("usage"))
Expand DownExpand Up@@ -365,6 +371,16 @@ def __iter__(self) -> Any:
def __next__(self) -> Any:
return next(self._traced_generator)

def __enter__(self) -> Any:
if hasattr(self._wrapped, "__enter__"):
self._wrapped.__enter__()
return self

def __exit__(self, exc_type, exc_val, exc_tb) -> Any:
if hasattr(self._wrapped, "__exit__"):
return self._wrapped.__exit__(exc_type, exc_val, exc_tb)
return None


class _AsyncTracedStream(NamedWrapper):
"""Traced async stream. Iterates via the traced generator while delegating
Expand All@@ -380,6 +396,16 @@ def __aiter__(self) -> Any:
async def __anext__(self) -> Any:
return await self._traced_generator.__anext__()

async def __aenter__(self) -> Any:
if hasattr(self._wrapped, "__aenter__"):
await self._wrapped.__aenter__()
return self

async def __aexit__(self, exc_type, exc_val, exc_tb) -> Any:
if hasattr(self._wrapped, "__aexit__"):
return await self._wrapped.__aexit__(exc_type, exc_val, exc_tb)
return None


class _RawResponseWithTracedStream(NamedWrapper):
"""Proxy for LegacyAPIResponse that replaces parse() with a traced stream,
Expand DownExpand Up@@ -445,7 +471,7 @@ def gen():
should_end = False
if self.return_raw and hasattr(create_response, "parse"):
return _RawResponseWithTracedStream(create_response, _TracedStream(raw_response, gen()))
return gen()
return _TracedStream(raw_response, gen())
else:
log_response = _try_to_dict(raw_response)
event_data = self._parse_event_from_result(log_response)
Expand DownExpand Up@@ -498,7 +524,7 @@ async def gen():
streamer = gen()
if self.return_raw and hasattr(create_response, "parse"):
return _RawResponseWithTracedStream(create_response, _AsyncTracedStream(raw_response, streamer))
return AsyncResponseWrapper(streamer)
return _AsyncTracedStream(raw_response, streamer)
else:
log_response = _try_to_dict(raw_response)
event_data = self._parse_event_from_result(log_response)
Expand Down
271 changes: 271 additions & 0 deletions ...s/cassettes/test_openai_chat_streaming_async_http2_context_manager_preserves_wrapper.yaml
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fix(openai): add context manager support to traced stream wrappers#120

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 Merged

Abhijeet Prasad (AbhiPrasad)
merged 2 commits into

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Mar 24, 2026
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fix(openai): add context manager support to traced stream wrappers
#120
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5a30502

fix(openai): add context manager support to traced stream wrappers


AbhiPrasad Mar 23, 2026
91d3fa6

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10 changes: 10 additions & 0 deletions
py/noxfile.py

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -210,6 +210,16 @@ def test_openai(session, version):
 _run_core_tests(session)


@nox.session()
def test_openai_http2_streaming(session):
 _install_test_deps(session)
 _install(session, "openai")
 # h2 is isolated to this session because it's only needed to force the
 # HTTP/2 LegacyAPIResponse streaming path used by the regression test.
 session.install("h2")
 _run_tests(session, f"{WRAPPER_DIR}/test_openai_http2.py")


@nox.session()
def test_openrouter(session):
 """Test wrap_openai with OpenRouter. Requires OPENROUTER_API_KEY env var."""
Expand Down

38 changes: 32 additions & 6 deletions
py/src/braintrust/oai.py

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -19,8 +19,14 @@

class NamedWrapper:
 def __init__(self, wrapped: Any):
 # Keep the legacy mangled attribute for existing wrapped-client checks
 # that introspect `_NamedWrapper__wrapped` directly.
 self.__wrapped = wrapped

 @property
 def _wrapped(self) -> Any:
 return self.__wrapped

 def __getattr__(self, name: str) -> Any:
 return getattr(self.__wrapped, name)

Expand All@@ -33,8 +39,8 @@ def __init__(self, response: Any):

 async def __aenter__(self):
 if hasattr(self._response, "__aenter__"):
return await self._response.__aenter__()
 return self._response
 await self._response.__aenter__()
 return self

 async def __aexit__(self, exc_type, exc_val, exc_tb):
 if hasattr(self._response, "__aexit__"):
Expand DownExpand Up@@ -188,7 +194,7 @@ def gen():
 span.end()

 should_end = False
 return gen()
 return _TracedStream(raw_response, gen())
 else:
 log_response = _try_to_dict(raw_response)
 metrics = _parse_metrics_from_usage(log_response.get("usage", {}))
Expand DownExpand Up@@ -244,7 +250,7 @@ async def gen():

 should_end = False
 streamer = gen()
 return AsyncResponseWrapper(streamer)
 return _AsyncTracedStream(raw_response, streamer)
 else:
 log_response = _try_to_dict(raw_response)
 metrics = _parse_metrics_from_usage(log_response.get("usage"))
Expand DownExpand Up@@ -365,6 +371,16 @@ def __iter__(self) -> Any:
 def __next__(self) -> Any:
 return next(self._traced_generator)

 def __enter__(self) -> Any:
 if hasattr(self._wrapped, "__enter__"):
 self._wrapped.__enter__()
 return self

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Expand All@@ -380,6 +396,16 @@ def __aiter__(self) -> Any:
 async def __anext__(self) -> Any:
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Expand DownExpand Up@@ -445,7 +471,7 @@ def gen():
 should_end = False
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 return gen()
 return _TracedStream(raw_response, gen())
 else:
 log_response = _try_to_dict(raw_response)
 event_data = self._parse_event_from_result(log_response)
Expand DownExpand Up@@ -498,7 +524,7 @@ async def gen():
 streamer = gen()
 if self.return_raw and hasattr(create_response, "parse"):
 return _RawResponseWithTracedStream(create_response, _AsyncTracedStream(raw_response, streamer))
 return AsyncResponseWrapper(streamer)
 return _AsyncTracedStream(raw_response, streamer)
 else:
 log_response = _try_to_dict(raw_response)
 event_data = self._parse_event_from_result(log_response)
Expand Down

271 changes: 271 additions & 0 deletions
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Abhijeet Prasad (AbhiPrasad)
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fix(openai): add context manager support to traced stream wrappers
#120
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fix(openai): add context manager support to traced stream wrappers


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10 changes: 10 additions & 0 deletions
py/noxfile.py

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -210,6 +210,16 @@ def test_openai(session, version):
 _run_core_tests(session)


@nox.session()
def test_openai_http2_streaming(session):
 _install_test_deps(session)
 _install(session, "openai")
 # h2 is isolated to this session because it's only needed to force the
 # HTTP/2 LegacyAPIResponse streaming path used by the regression test.
 session.install("h2")
 _run_tests(session, f"{WRAPPER_DIR}/test_openai_http2.py")


@nox.session()
def test_openrouter(session):
 """Test wrap_openai with OpenRouter. Requires OPENROUTER_API_KEY env var."""
Expand Down

38 changes: 32 additions & 6 deletions
py/src/braintrust/oai.py

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -19,8 +19,14 @@

class NamedWrapper:
 def __init__(self, wrapped: Any):
 # Keep the legacy mangled attribute for existing wrapped-client checks
 # that introspect `_NamedWrapper__wrapped` directly.
 self.__wrapped = wrapped

 @property
 def _wrapped(self) -> Any:
 return self.__wrapped

 def __getattr__(self, name: str) -> Any:
 return getattr(self.__wrapped, name)

Expand All@@ -33,8 +39,8 @@ def __init__(self, response: Any):

 async def __aenter__(self):
 if hasattr(self._response, "__aenter__"):
return await self._response.__aenter__()
 return self._response
 await self._response.__aenter__()
 return self

 async def __aexit__(self, exc_type, exc_val, exc_tb):
 if hasattr(self._response, "__aexit__"):
Expand DownExpand Up@@ -188,7 +194,7 @@ def gen():
 span.end()

 should_end = False
 return gen()
 return _TracedStream(raw_response, gen())
 else:
 log_response = _try_to_dict(raw_response)
 metrics = _parse_metrics_from_usage(log_response.get("usage", {}))
Expand DownExpand Up@@ -244,7 +250,7 @@ async def gen():

 should_end = False
 streamer = gen()
 return AsyncResponseWrapper(streamer)
 return _AsyncTracedStream(raw_response, streamer)
 else:
 log_response = _try_to_dict(raw_response)
 metrics = _parse_metrics_from_usage(log_response.get("usage"))
Expand DownExpand Up@@ -365,6 +371,16 @@ def __iter__(self) -> Any:
 def __next__(self) -> Any:
 return next(self._traced_generator)

 def __enter__(self) -> Any:
 if hasattr(self._wrapped, "__enter__"):
 self._wrapped.__enter__()
 return self

 def __exit__(self, exc_type, exc_val, exc_tb) -> Any:
 if hasattr(self._wrapped, "__exit__"):
 return self._wrapped.__exit__(exc_type, exc_val, exc_tb)
 return None


class _AsyncTracedStream(NamedWrapper):
 """Traced async stream. Iterates via the traced generator while delegating
Expand All@@ -380,6 +396,16 @@ def __aiter__(self) -> Any:
 async def __anext__(self) -> Any:
 return await self._traced_generator.__anext__()

 async def __aenter__(self) -> Any:
 if hasattr(self._wrapped, "__aenter__"):
 await self._wrapped.__aenter__()
 return self

 async def __aexit__(self, exc_type, exc_val, exc_tb) -> Any:
 if hasattr(self._wrapped, "__aexit__"):
 return await self._wrapped.__aexit__(exc_type, exc_val, exc_tb)
 return None


class _RawResponseWithTracedStream(NamedWrapper):
 """Proxy for LegacyAPIResponse that replaces parse() with a traced stream,
Expand DownExpand Up@@ -445,7 +471,7 @@ def gen():
 should_end = False
 if self.return_raw and hasattr(create_response, "parse"):
 return _RawResponseWithTracedStream(create_response, _TracedStream(raw_response, gen()))
 return gen()
 return _TracedStream(raw_response, gen())
 else:
 log_response = _try_to_dict(raw_response)
 event_data = self._parse_event_from_result(log_response)
Expand DownExpand Up@@ -498,7 +524,7 @@ async def gen():
 streamer = gen()
 if self.return_raw and hasattr(create_response, "parse"):
 return _RawResponseWithTracedStream(create_response, _AsyncTracedStream(raw_response, streamer))
 return AsyncResponseWrapper(streamer)
 return _AsyncTracedStream(raw_response, streamer)
 else:
 log_response = _try_to_dict(raw_response)
 event_data = self._parse_event_from_result(log_response)
Expand Down

271 changes: 271 additions & 0 deletions
...s/cassettes/test_openai_chat_streaming_async_http2_context_manager_preserves_wrapper.yaml

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fix(openai): add context manager support to traced stream wrappers#120

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Abhijeet Prasad (AbhiPrasad)
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fix(openai): add context manager support to traced stream wrappers
#120
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fix(openai): add context manager support to traced stream wrappers


AbhiPrasad Mar 23, 2026
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10 changes: 10 additions & 0 deletions
py/noxfile.py

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -210,6 +210,16 @@ def test_openai(session, version):
 _run_core_tests(session)


@nox.session()
def test_openai_http2_streaming(session):
 _install_test_deps(session)
 _install(session, "openai")
 # h2 is isolated to this session because it's only needed to force the
 # HTTP/2 LegacyAPIResponse streaming path used by the regression test.
 session.install("h2")
 _run_tests(session, f"{WRAPPER_DIR}/test_openai_http2.py")


@nox.session()
def test_openrouter(session):
 """Test wrap_openai with OpenRouter. Requires OPENROUTER_API_KEY env var."""
Expand Down

38 changes: 32 additions & 6 deletions
py/src/braintrust/oai.py

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Original file line numberDiff line numberDiff line change
Expand Up@@ -19,8 +19,14 @@

class NamedWrapper:
 def __init__(self, wrapped: Any):
 # Keep the legacy mangled attribute for existing wrapped-client checks
 # that introspect `_NamedWrapper__wrapped` directly.
 self.__wrapped = wrapped

 @property
 def _wrapped(self) -> Any:
 return self.__wrapped

 def __getattr__(self, name: str) -> Any:
 return getattr(self.__wrapped, name)

Expand All@@ -33,8 +39,8 @@ def __init__(self, response: Any):

 async def __aenter__(self):
 if hasattr(self._response, "__aenter__"):
return await self._response.__aenter__()
 return self._response
 await self._response.__aenter__()
 return self

 async def __aexit__(self, exc_type, exc_val, exc_tb):
 if hasattr(self._response, "__aexit__"):
Expand DownExpand Up@@ -188,7 +194,7 @@ def gen():
 span.end()

 should_end = False
 return gen()
 return _TracedStream(raw_response, gen())
 else:
 log_response = _try_to_dict(raw_response)
 metrics = _parse_metrics_from_usage(log_response.get("usage", {}))
Expand DownExpand Up@@ -244,7 +250,7 @@ async def gen():

 should_end = False
 streamer = gen()
 return AsyncResponseWrapper(streamer)
 return _AsyncTracedStream(raw_response, streamer)
 else:
 log_response = _try_to_dict(raw_response)
 metrics = _parse_metrics_from_usage(log_response.get("usage"))
Expand DownExpand Up@@ -365,6 +371,16 @@ def __iter__(self) -> Any:
 def __next__(self) -> Any:
 return next(self._traced_generator)

 def __enter__(self) -> Any:
 if hasattr(self._wrapped, "__enter__"):
 self._wrapped.__enter__()
 return self

 def __exit__(self, exc_type, exc_val, exc_tb) -> Any:
 if hasattr(self._wrapped, "__exit__"):
 return self._wrapped.__exit__(exc_type, exc_val, exc_tb)
 return None


class _AsyncTracedStream(NamedWrapper):
 """Traced async stream. Iterates via the traced generator while delegating
Expand All@@ -380,6 +396,16 @@ def __aiter__(self) -> Any:
 async def __anext__(self) -> Any:
 return await self._traced_generator.__anext__()

 async def __aenter__(self) -> Any:
 if hasattr(self._wrapped, "__aenter__"):
 await self._wrapped.__aenter__()
 return self

 async def __aexit__(self, exc_type, exc_val, exc_tb) -> Any:
 if hasattr(self._wrapped, "__aexit__"):
 return await self._wrapped.__aexit__(exc_type, exc_val, exc_tb)
 return None


class _RawResponseWithTracedStream(NamedWrapper):
 """Proxy for LegacyAPIResponse that replaces parse() with a traced stream,
Expand DownExpand Up@@ -445,7 +471,7 @@ def gen():
 should_end = False
 if self.return_raw and hasattr(create_response, "parse"):
 return _RawResponseWithTracedStream(create_response, _TracedStream(raw_response, gen()))
 return gen()
 return _TracedStream(raw_response, gen())
 else:
 log_response = _try_to_dict(raw_response)
 event_data = self._parse_event_from_result(log_response)
Expand DownExpand Up@@ -498,7 +524,7 @@ async def gen():
 streamer = gen()
 if self.return_raw and hasattr(create_response, "parse"):
 return _RawResponseWithTracedStream(create_response, _AsyncTracedStream(raw_response, streamer))
 return AsyncResponseWrapper(streamer)
 return _AsyncTracedStream(raw_response, streamer)
 else:
 log_response = _try_to_dict(raw_response)
 event_data = self._parse_event_from_result(log_response)
Expand Down

271 changes: 271 additions & 0 deletions
...s/cassettes/test_openai_chat_streaming_async_http2_context_manager_preserves_wrapper.yaml

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Original file line numberDiff line numberDiff line change
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Abhijeet Prasad (AbhiPrasad)
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fix(openai): add context manager support to traced stream wrappers
#120
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fix(openai): add context manager support to traced stream wrappers


AbhiPrasad Mar 23, 2026
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10 changes: 10 additions & 0 deletions
py/noxfile.py

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -210,6 +210,16 @@ def test_openai(session, version):
 _run_core_tests(session)


@nox.session()
def test_openai_http2_streaming(session):
 _install_test_deps(session)
 _install(session, "openai")
 # h2 is isolated to this session because it's only needed to force the
 # HTTP/2 LegacyAPIResponse streaming path used by the regression test.
 session.install("h2")
 _run_tests(session, f"{WRAPPER_DIR}/test_openai_http2.py")


@nox.session()
def test_openrouter(session):
 """Test wrap_openai with OpenRouter. Requires OPENROUTER_API_KEY env var."""
Expand Down

38 changes: 32 additions & 6 deletions
py/src/braintrust/oai.py

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Original file line numberDiff line numberDiff line change
Expand Up@@ -19,8 +19,14 @@

class NamedWrapper:
 def __init__(self, wrapped: Any):
 # Keep the legacy mangled attribute for existing wrapped-client checks
 # that introspect `_NamedWrapper__wrapped` directly.
 self.__wrapped = wrapped

 @property
 def _wrapped(self) -> Any:
 return self.__wrapped

 def __getattr__(self, name: str) -> Any:
 return getattr(self.__wrapped, name)

Expand All@@ -33,8 +39,8 @@ def __init__(self, response: Any):

 async def __aenter__(self):
 if hasattr(self._response, "__aenter__"):
return await self._response.__aenter__()
 return self._response
 await self._response.__aenter__()
 return self

 async def __aexit__(self, exc_type, exc_val, exc_tb):
 if hasattr(self._response, "__aexit__"):
Expand DownExpand Up@@ -188,7 +194,7 @@ def gen():
 span.end()

 should_end = False
 return gen()
 return _TracedStream(raw_response, gen())
 else:
 log_response = _try_to_dict(raw_response)
 metrics = _parse_metrics_from_usage(log_response.get("usage", {}))
Expand DownExpand Up@@ -244,7 +250,7 @@ async def gen():

 should_end = False
 streamer = gen()
 return AsyncResponseWrapper(streamer)
 return _AsyncTracedStream(raw_response, streamer)
 else:
 log_response = _try_to_dict(raw_response)
 metrics = _parse_metrics_from_usage(log_response.get("usage"))
Expand DownExpand Up@@ -365,6 +371,16 @@ def __iter__(self) -> Any:
 def __next__(self) -> Any:
 return next(self._traced_generator)

 def __enter__(self) -> Any:
 if hasattr(self._wrapped, "__enter__"):
 self._wrapped.__enter__()
 return self

 def __exit__(self, exc_type, exc_val, exc_tb) -> Any:
 if hasattr(self._wrapped, "__exit__"):
 return self._wrapped.__exit__(exc_type, exc_val, exc_tb)
 return None


class _AsyncTracedStream(NamedWrapper):
 """Traced async stream. Iterates via the traced generator while delegating
Expand All@@ -380,6 +396,16 @@ def __aiter__(self) -> Any:
 async def __anext__(self) -> Any:
 return await self._traced_generator.__anext__()

 async def __aenter__(self) -> Any:
 if hasattr(self._wrapped, "__aenter__"):
 await self._wrapped.__aenter__()
 return self

 async def __aexit__(self, exc_type, exc_val, exc_tb) -> Any:
 if hasattr(self._wrapped, "__aexit__"):
 return await self._wrapped.__aexit__(exc_type, exc_val, exc_tb)
 return None


class _RawResponseWithTracedStream(NamedWrapper):
 """Proxy for LegacyAPIResponse that replaces parse() with a traced stream,
Expand DownExpand Up@@ -445,7 +471,7 @@ def gen():
 should_end = False
 if self.return_raw and hasattr(create_response, "parse"):
 return _RawResponseWithTracedStream(create_response, _TracedStream(raw_response, gen()))
 return gen()
 return _TracedStream(raw_response, gen())
 else:
 log_response = _try_to_dict(raw_response)
 event_data = self._parse_event_from_result(log_response)
Expand DownExpand Up@@ -498,7 +524,7 @@ async def gen():
 streamer = gen()
 if self.return_raw and hasattr(create_response, "parse"):
 return _RawResponseWithTracedStream(create_response, _AsyncTracedStream(raw_response, streamer))
 return AsyncResponseWrapper(streamer)
 return _AsyncTracedStream(raw_response, streamer)
 else:
 log_response = _try_to_dict(raw_response)
 event_data = self._parse_event_from_result(log_response)
Expand Down

271 changes: 271 additions & 0 deletions
...s/cassettes/test_openai_chat_streaming_async_http2_context_manager_preserves_wrapper.yaml

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Original file line numberDiff line numberDiff line change
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Abhijeet Prasad (AbhiPrasad)
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fix(openai): add context manager support to traced stream wrappers
#120
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fix(openai): add context manager support to traced stream wrappers


AbhiPrasad Mar 23, 2026
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10 changes: 10 additions & 0 deletions
py/noxfile.py

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Original file line numberDiff line numberDiff line change
Expand Up@@ -210,6 +210,16 @@ def test_openai(session, version):
 _run_core_tests(session)


@nox.session()
def test_openai_http2_streaming(session):
 _install_test_deps(session)
 _install(session, "openai")
 # h2 is isolated to this session because it's only needed to force the
 # HTTP/2 LegacyAPIResponse streaming path used by the regression test.
 session.install("h2")
 _run_tests(session, f"{WRAPPER_DIR}/test_openai_http2.py")


@nox.session()
def test_openrouter(session):
 """Test wrap_openai with OpenRouter. Requires OPENROUTER_API_KEY env var."""
Expand Down

38 changes: 32 additions & 6 deletions
py/src/braintrust/oai.py

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Original file line numberDiff line numberDiff line change
Expand Up@@ -19,8 +19,14 @@

class NamedWrapper:
 def __init__(self, wrapped: Any):
 # Keep the legacy mangled attribute for existing wrapped-client checks
 # that introspect `_NamedWrapper__wrapped` directly.
 self.__wrapped = wrapped

 @property
 def _wrapped(self) -> Any:
 return self.__wrapped

 def __getattr__(self, name: str) -> Any:
 return getattr(self.__wrapped, name)

Expand All@@ -33,8 +39,8 @@ def __init__(self, response: Any):

 async def __aenter__(self):
 if hasattr(self._response, "__aenter__"):
return await self._response.__aenter__()
 return self._response
 await self._response.__aenter__()
 return self

 async def __aexit__(self, exc_type, exc_val, exc_tb):
 if hasattr(self._response, "__aexit__"):
Expand DownExpand Up@@ -188,7 +194,7 @@ def gen():
 span.end()

 should_end = False
 return gen()
 return _TracedStream(raw_response, gen())
 else:
 log_response = _try_to_dict(raw_response)
 metrics = _parse_metrics_from_usage(log_response.get("usage", {}))
Expand DownExpand Up@@ -244,7 +250,7 @@ async def gen():

 should_end = False
 streamer = gen()
 return AsyncResponseWrapper(streamer)
 return _AsyncTracedStream(raw_response, streamer)
 else:
 log_response = _try_to_dict(raw_response)
 metrics = _parse_metrics_from_usage(log_response.get("usage"))
Expand DownExpand Up@@ -365,6 +371,16 @@ def __iter__(self) -> Any:
 def __next__(self) -> Any:
 return next(self._traced_generator)

 def __enter__(self) -> Any:
 if hasattr(self._wrapped, "__enter__"):
 self._wrapped.__enter__()
 return self

 def __exit__(self, exc_type, exc_val, exc_tb) -> Any:
 if hasattr(self._wrapped, "__exit__"):
 return self._wrapped.__exit__(exc_type, exc_val, exc_tb)
 return None


class _AsyncTracedStream(NamedWrapper):
 """Traced async stream. Iterates via the traced generator while delegating
Expand All@@ -380,6 +396,16 @@ def __aiter__(self) -> Any:
 async def __anext__(self) -> Any:
 return await self._traced_generator.__anext__()

 async def __aenter__(self) -> Any:
 if hasattr(self._wrapped, "__aenter__"):
 await self._wrapped.__aenter__()
 return self

 async def __aexit__(self, exc_type, exc_val, exc_tb) -> Any:
 if hasattr(self._wrapped, "__aexit__"):
 return await self._wrapped.__aexit__(exc_type, exc_val, exc_tb)
 return None


class _RawResponseWithTracedStream(NamedWrapper):
 """Proxy for LegacyAPIResponse that replaces parse() with a traced stream,
Expand DownExpand Up@@ -445,7 +471,7 @@ def gen():
 should_end = False
 if self.return_raw and hasattr(create_response, "parse"):
 return _RawResponseWithTracedStream(create_response, _TracedStream(raw_response, gen()))
 return gen()
 return _TracedStream(raw_response, gen())
 else:
 log_response = _try_to_dict(raw_response)
 event_data = self._parse_event_from_result(log_response)
Expand DownExpand Up@@ -498,7 +524,7 @@ async def gen():
 streamer = gen()
 if self.return_raw and hasattr(create_response, "parse"):
 return _RawResponseWithTracedStream(create_response, _AsyncTracedStream(raw_response, streamer))
 return AsyncResponseWrapper(streamer)
 return _AsyncTracedStream(raw_response, streamer)
 else:
 log_response = _try_to_dict(raw_response)
 event_data = self._parse_event_from_result(log_response)
Expand Down

271 changes: 271 additions & 0 deletions
...s/cassettes/test_openai_chat_streaming_async_http2_context_manager_preserves_wrapper.yaml

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Abhijeet Prasad (AbhiPrasad)
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Mar 24, 2026
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fix(openai): add context manager support to traced stream wrappers
#120
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fix(openai): add context manager support to traced stream wrappers


AbhiPrasad Mar 23, 2026
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10 changes: 10 additions & 0 deletions
py/noxfile.py

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -210,6 +210,16 @@ def test_openai(session, version):
 _run_core_tests(session)


@nox.session()
def test_openai_http2_streaming(session):
 _install_test_deps(session)
 _install(session, "openai")
 # h2 is isolated to this session because it's only needed to force the
 # HTTP/2 LegacyAPIResponse streaming path used by the regression test.
 session.install("h2")
 _run_tests(session, f"{WRAPPER_DIR}/test_openai_http2.py")


@nox.session()
def test_openrouter(session):
 """Test wrap_openai with OpenRouter. Requires OPENROUTER_API_KEY env var."""
Expand Down

38 changes: 32 additions & 6 deletions
py/src/braintrust/oai.py

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Original file line numberDiff line numberDiff line change
Expand Up@@ -19,8 +19,14 @@

class NamedWrapper:
 def __init__(self, wrapped: Any):
 # Keep the legacy mangled attribute for existing wrapped-client checks
 # that introspect `_NamedWrapper__wrapped` directly.
 self.__wrapped = wrapped

 @property
 def _wrapped(self) -> Any:
 return self.__wrapped

 def __getattr__(self, name: str) -> Any:
 return getattr(self.__wrapped, name)

Expand All@@ -33,8 +39,8 @@ def __init__(self, response: Any):

 async def __aenter__(self):
 if hasattr(self._response, "__aenter__"):
return await self._response.__aenter__()
 return self._response
 await self._response.__aenter__()
 return self

 async def __aexit__(self, exc_type, exc_val, exc_tb):
 if hasattr(self._response, "__aexit__"):
Expand DownExpand Up@@ -188,7 +194,7 @@ def gen():
 span.end()

 should_end = False
 return gen()
 return _TracedStream(raw_response, gen())
 else:
 log_response = _try_to_dict(raw_response)
 metrics = _parse_metrics_from_usage(log_response.get("usage", {}))
Expand DownExpand Up@@ -244,7 +250,7 @@ async def gen():

 should_end = False
 streamer = gen()
 return AsyncResponseWrapper(streamer)
 return _AsyncTracedStream(raw_response, streamer)
 else:
 log_response = _try_to_dict(raw_response)
 metrics = _parse_metrics_from_usage(log_response.get("usage"))
Expand DownExpand Up@@ -365,6 +371,16 @@ def __iter__(self) -> Any:
 def __next__(self) -> Any:
 return next(self._traced_generator)

 def __enter__(self) -> Any:
 if hasattr(self._wrapped, "__enter__"):
 self._wrapped.__enter__()
 return self

 def __exit__(self, exc_type, exc_val, exc_tb) -> Any:
 if hasattr(self._wrapped, "__exit__"):
 return self._wrapped.__exit__(exc_type, exc_val, exc_tb)
 return None


class _AsyncTracedStream(NamedWrapper):
 """Traced async stream. Iterates via the traced generator while delegating
Expand All@@ -380,6 +396,16 @@ def __aiter__(self) -> Any:
 async def __anext__(self) -> Any:
 return await self._traced_generator.__anext__()

 async def __aenter__(self) -> Any:
 if hasattr(self._wrapped, "__aenter__"):
 await self._wrapped.__aenter__()
 return self

 async def __aexit__(self, exc_type, exc_val, exc_tb) -> Any:
 if hasattr(self._wrapped, "__aexit__"):
 return await self._wrapped.__aexit__(exc_type, exc_val, exc_tb)
 return None


class _RawResponseWithTracedStream(NamedWrapper):
 """Proxy for LegacyAPIResponse that replaces parse() with a traced stream,
Expand DownExpand Up@@ -445,7 +471,7 @@ def gen():
 should_end = False
 if self.return_raw and hasattr(create_response, "parse"):
 return _RawResponseWithTracedStream(create_response, _TracedStream(raw_response, gen()))
 return gen()
 return _TracedStream(raw_response, gen())
 else:
 log_response = _try_to_dict(raw_response)
 event_data = self._parse_event_from_result(log_response)
Expand DownExpand Up@@ -498,7 +524,7 @@ async def gen():
 streamer = gen()
 if self.return_raw and hasattr(create_response, "parse"):
 return _RawResponseWithTracedStream(create_response, _AsyncTracedStream(raw_response, streamer))
 return AsyncResponseWrapper(streamer)
 return _AsyncTracedStream(raw_response, streamer)
 else:
 log_response = _try_to_dict(raw_response)
 event_data = self._parse_event_from_result(log_response)
Expand Down

271 changes: 271 additions & 0 deletions
...s/cassettes/test_openai_chat_streaming_async_http2_context_manager_preserves_wrapper.yaml

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fix(openai): add context manager support to traced stream wrappers#120

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Abhijeet Prasad (AbhiPrasad)
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Mar 24, 2026
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fix(openai): add context manager support to traced stream wrappers
#120
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fix(openai): add context manager support to traced stream wrappers


AbhiPrasad Mar 23, 2026
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10 changes: 10 additions & 0 deletions
py/noxfile.py

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Original file line numberDiff line numberDiff line change
Expand Up@@ -210,6 +210,16 @@ def test_openai(session, version):
 _run_core_tests(session)


@nox.session()
def test_openai_http2_streaming(session):
 _install_test_deps(session)
 _install(session, "openai")
 # h2 is isolated to this session because it's only needed to force the
 # HTTP/2 LegacyAPIResponse streaming path used by the regression test.
 session.install("h2")
 _run_tests(session, f"{WRAPPER_DIR}/test_openai_http2.py")


@nox.session()
def test_openrouter(session):
 """Test wrap_openai with OpenRouter. Requires OPENROUTER_API_KEY env var."""
Expand Down

38 changes: 32 additions & 6 deletions
py/src/braintrust/oai.py

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Original file line numberDiff line numberDiff line change
Expand Up@@ -19,8 +19,14 @@

class NamedWrapper:
 def __init__(self, wrapped: Any):
 # Keep the legacy mangled attribute for existing wrapped-client checks
 # that introspect `_NamedWrapper__wrapped` directly.
 self.__wrapped = wrapped

 @property
 def _wrapped(self) -> Any:
 return self.__wrapped

 def __getattr__(self, name: str) -> Any:
 return getattr(self.__wrapped, name)

Expand All@@ -33,8 +39,8 @@ def __init__(self, response: Any):

 async def __aenter__(self):
 if hasattr(self._response, "__aenter__"):
return await self._response.__aenter__()
 return self._response
 await self._response.__aenter__()
 return self

 async def __aexit__(self, exc_type, exc_val, exc_tb):
 if hasattr(self._response, "__aexit__"):
Expand DownExpand Up@@ -188,7 +194,7 @@ def gen():
 span.end()

 should_end = False
 return gen()
 return _TracedStream(raw_response, gen())
 else:
 log_response = _try_to_dict(raw_response)
 metrics = _parse_metrics_from_usage(log_response.get("usage", {}))
Expand DownExpand Up@@ -244,7 +250,7 @@ async def gen():

 should_end = False
 streamer = gen()
 return AsyncResponseWrapper(streamer)
 return _AsyncTracedStream(raw_response, streamer)
 else:
 log_response = _try_to_dict(raw_response)
 metrics = _parse_metrics_from_usage(log_response.get("usage"))
Expand DownExpand Up@@ -365,6 +371,16 @@ def __iter__(self) -> Any:
 def __next__(self) -> Any:
 return next(self._traced_generator)

 def __enter__(self) -> Any:
 if hasattr(self._wrapped, "__enter__"):
 self._wrapped.__enter__()
 return self

 def __exit__(self, exc_type, exc_val, exc_tb) -> Any:
 if hasattr(self._wrapped, "__exit__"):
 return self._wrapped.__exit__(exc_type, exc_val, exc_tb)
 return None


class _AsyncTracedStream(NamedWrapper):
 """Traced async stream. Iterates via the traced generator while delegating
Expand All@@ -380,6 +396,16 @@ def __aiter__(self) -> Any:
 async def __anext__(self) -> Any:
 return await self._traced_generator.__anext__()

 async def __aenter__(self) -> Any:
 if hasattr(self._wrapped, "__aenter__"):
 await self._wrapped.__aenter__()
 return self

 async def __aexit__(self, exc_type, exc_val, exc_tb) -> Any:
 if hasattr(self._wrapped, "__aexit__"):
 return await self._wrapped.__aexit__(exc_type, exc_val, exc_tb)
 return None


class _RawResponseWithTracedStream(NamedWrapper):
 """Proxy for LegacyAPIResponse that replaces parse() with a traced stream,
Expand DownExpand Up@@ -445,7 +471,7 @@ def gen():
 should_end = False
 if self.return_raw and hasattr(create_response, "parse"):
 return _RawResponseWithTracedStream(create_response, _TracedStream(raw_response, gen()))
 return gen()
 return _TracedStream(raw_response, gen())
 else:
 log_response = _try_to_dict(raw_response)
 event_data = self._parse_event_from_result(log_response)
Expand DownExpand Up@@ -498,7 +524,7 @@ async def gen():
 streamer = gen()
 if self.return_raw and hasattr(create_response, "parse"):
 return _RawResponseWithTracedStream(create_response, _AsyncTracedStream(raw_response, streamer))
 return AsyncResponseWrapper(streamer)
 return _AsyncTracedStream(raw_response, streamer)
 else:
 log_response = _try_to_dict(raw_response)
 event_data = self._parse_event_from_result(log_response)
Expand Down

271 changes: 271 additions & 0 deletions
...s/cassettes/test_openai_chat_streaming_async_http2_context_manager_preserves_wrapper.yaml

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