[BUG CLIENT]: Attribute error raised when trying to httpx content in otel.py module

[panagiotisrit]

Python -VV

Python 3.12.8 (main, Jul 24 2025, 15:51:39) [Clang 16.0.0 (clang-1600.0.26.6)]

Pip Freeze

annotated-types==0.7.0
anyio==4.11.0
asttokens==3.0.0
backoff==2.2.1
beautifulsoup4==4.14.3
certifi==2025.8.3
cfgv==3.4.0
charset-normalizer==3.4.4
click==8.3.0
cobble==0.1.4
coverage==7.10.7
decorator==5.2.1
distlib==0.4.0
distro==1.9.0
docstring-parser-fork==0.0.14
dynaconf==3.2.11
eval-type-backport==0.3.1
executing==2.2.1
fastapi==0.117.1
filelock==3.19.1
googleapis-common-protos==1.72.0
h11==0.16.0
httpcore==1.0.9
httpx==0.28.1
identify==2.6.14
idna==3.10
importlib-metadata==8.7.1
iniconfig==2.1.0
invoke==2.2.1
ipython==9.5.0
ipython-pygments-lexers==1.1.1
jedi==0.19.2
jiter==0.13.0
langfuse==3.13.0
librt==0.7.7
mammoth==1.11.0
markdownify==0.14.1
matplotlib-inline==0.1.7
mistralai==1.12.0
mypy==1.19.1
mypy-extensions==1.1.0
nodeenv==1.9.1
openai==2.17.0
opentelemetry-api==1.38.0
opentelemetry-exporter-otlp-proto-common==1.38.0
opentelemetry-exporter-otlp-proto-http==1.38.0
opentelemetry-proto==1.38.0
opentelemetry-sdk==1.38.0
opentelemetry-semantic-conventions==0.59b0
packaging==25.0
parso==0.8.5
pathspec==1.0.2
pexpect==4.9.0
pip==25.3
platformdirs==4.4.0
pluggy==1.6.0
pre-commit==4.3.0
prompt-toolkit==3.0.52
protobuf==6.33.4
ptyprocess==0.7.0
pure-eval==0.2.3
pydantic==2.11.9
pydantic-core==2.33.2
pydoclint==0.8.3
pygments==2.19.2
pytest==8.4.2
pytest-asyncio==1.3.0
pytest-cov==7.0.0
python-dateutil==2.9.0.post0
python-multipart==0.0.21
pyyaml==6.0.2
requests==2.32.5
ruff==0.13.1
six==1.17.0
sniffio==1.3.1
soupsieve==2.8.1
stack-data==0.6.3
starlette==0.46.2
structlog==24.4.0
tenacity==9.1.2
tqdm==4.67.3
traitlets==5.14.3
typing-extensions==4.15.0
typing-inspection==0.4.1
unoserver==3.6
urllib3==2.6.3
uv==0.9.11
uvicorn==0.37.0
virtualenv==20.34.0
wcwidth==0.2.14
wrapt==1.17.3
zipp==3.23.0

Reproduction Steps

from mistralai import Mistral

Use provided client

    mistral_client =  Mistral(api_key=settings.mistral_api_key)

    # Upload file
    uploaded = await mistral_client.files.upload_async(
        file={"file_name": file_input.filename, "content": file_input.content},
        purpose="ocr",
    )

    # inside parse_pdf_to_markdown
    with langfuse.start_as_current_observation(name="mistral_ocr", as_type="tool", metadata={
        "model": settings.mistral_model,
    }) as tool:

        # Get signed URL
        signed_url = await mistral_client.files.get_signed_url_async(file_id=uploaded.id)

        # Process with OCR
        response = await mistral_client.ocr.process_async(
            model=settings.mistral_model,
            document={"type": "document_url", "document_url": signed_url.url},
            include_image_base64=False,
            image_limit=0,
        )

Expected Behavior

mistral's otel implementation enrich_span_from_request is trying to access request._content, but httpx's Request object at 0.28.1 does not contain such an object, therefore throwing an attribute error.

Here's the error:
Failed to create span for request. Traceback (most recent call last):
File "/Users/user/Documents/Repos/my-repo/.venv/lib/python3.12/site-packages/mistralai/extra/observability/otel.py", line 250, in get_traced_request_and_span
span = enrich_span_from_request(span, request)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/user/Documents/Repos/my-repo/.venv/lib/python3.12/site-packages/mistralai/extra/observability/otel.py", line 94, in enrich_span_from_request
if request._content:
^^^^^^^^^^^^^^^^
AttributeError: 'Request' object has no attribute '_content'. Did you mean: 'content'?

Otel.py was introduced on tag 1.10.0.

Additional Context

No response

Suggested Solutions

No response