Braintrust Python SDK
The official Python SDK for logging, tracing, and evaluating AI applications with Braintrust.
Installation
Install the SDK:
pip install braintrust
Quickstart
Run a simple evaluation:
from braintrust import Eval
def is_equal(expected, output):
return expected == output
Eval(
"Say Hi Bot",
data=lambda: [
{"input": "Foo", "expected": "Hi Foo"},
{"input": "Bar", "expected": "Hello Bar"},
],
task=lambda input: "Hi " + input,
scores=[is_equal],
)
Then run:
BRAINTRUST_API_KEY=<YOUR_API_KEY> braintrust eval tutorial_eval.py
Optional Extras
Install extras as needed for specific workflows:
pip install "braintrust[audio]"
pip install "braintrust[cli]"
pip install "braintrust[openai-agents]"
pip install "braintrust[otel]"
pip install "braintrust[temporal]"
pip install "braintrust[all]"
Available extras:
audio: installs PyAV for Opus/Ogg session recording on Python 3.12+performance: installsorjsonfor faster JSON serializationcli: installs optional dependencies used by the Braintrust CLIopenai-agents: installs OpenAI Agents integration supportotel: installs OpenTelemetry integration dependenciestemporal: installs Temporal integration dependenciesall: installs all optional extras
Audio encoding
braintrust[audio] requires Python 3.12+ and uses PyAV's bundled FFmpeg codecs.
On Python 3.10–3.11, the extra does not install PyAV; use PCM/WAV recording.
Each Opus/Ogg segment is an independent file with exact playable duration. Installing the extra does not
enable capture; framework adapters still require their audio opt-ins and privacy
permission. Without PyAV, default recording warns once and uses raw PCM. Explicit
Opus configuration requires the extra. PCM/WAV need no native codecs.
Audio uploads use Attachment.upload() directly. Span customizers and masking
apply to trace records published afterward; removing an attachment reference does
not prevent or undo its upload.
Documentation
- Python SDK docs: https://docs.braintrust.dev/sdks/python/versions/latest
- Braintrust docs: https://docs.braintrust.dev
- Repo publishing guide: https://github.com/braintrustdata/braintrust-sdk-python/blob/main/docs/publishing.md
- Source code: https://github.com/braintrustdata/braintrust-sdk-python/tree/main/py
License
Apache-2.0
1 maintainer
Metadata
1 maintainer
Release files for braintrust 0.50.0
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