babon 1.2.0

Babon kinematics-as-a-service client. Video in, movement data out.

babon

Kinematics-as-a-service client. Video in, movement data out.

pip install babon

from babon import Babon

client = Babon()                                              # picks up BABON_API_KEY
analysis = client.analyses.create(video="trial.mp4", wait=True)
print(analysis.metrics["gait_speed_m_s"])                     # 1.32
print(analysis.angles)                                        # DataFrame

That's it. Three lines.

A bit more

# Fire and forget, retrieve later
analysis = client.analyses.create(video="trial.mp4")
# ... save analysis.id somewhere, exit, come back ...
analysis = client.analyses.retrieve("YOUR_ANALYSIS_ID")
print(analysis.status)                                        # queued|processing|completed|failed|canceled

# Cohort
batch = client.batches.create(requests=[
    {"video": "a.mp4"},
    {"video": "b.mp4", "label": "cohort-3"},
    {"video": "c.mp4", "model": "gemx"},
])
for analysis in batch.results(as_completed=True):             # yields as each finishes
    save(analysis.angles)

# Lazy projections (each is one cheap HTTP GET, cached per instance)
analysis.angles                       # DataFrame, all joints
analysis.angles(joint="knee_R")       # filtered
analysis.grf                          # GRF waveform, None for non-walking clips
analysis.events                       # heel-strike / toe-off
analysis.metrics                      # cadence, gait_speed, symmetry_index, ...
analysis.quality                      # tier + z-scores
analysis.skeleton                     # 3D viewer payload
analysis.download("out.zip", include=["angles", "grf"])

# Big files? The SDK auto-switches to presigned PUT above 100 MB.
client.analyses.create(video="4gb_video.mp4")                 # transparent

CLI

babon login                                                   # interactive: paste key
babon analyses create trial.mp4 --wait
babon analyses get YOUR_ANALYSIS_ID
babon analyses list --status completed --limit 20
babon batches create ./study/ --label baseline
babon usage                                                   # seconds used this month

Errors

The client raises typed exceptions:

• BabonAuthError — bad key, wrong environment, DPA not accepted.
• BabonQuotaExceeded — monthly limit, concurrent limit, or rate-limited.
• BabonInvalidVideo — file is not a recognised container.
• BabonInvalidLabel — label looks like a real name (ADR-0002).
• BabonRunFailed — pipeline failed.
• BabonTimeout — wait() exceeded its timeout.

All carry .code (the API error code) and .request_id (the support handle).

The HTTP transport retries 429 (honoring Retry-After), 5xx, and network errors with exponential backoff. POST requests are only retried when sent with Idempotency-Key (the SDK auto-generates one per file). 4xx errors raise immediately.

What we are and are not

• Measurement only. Output is kinematics; clinical interpretation is yours.
• EU-cloud (Scaleway fr-par). Videos never leave the EU.
• Don't put real patient names in label or in your filenames. We reject name-shaped labels server-side.

Configure

client = Babon(
    key="YOUR_KEY",                       # optional, else BABON_API_KEY env
    base_url="https://api.babon.eu",      # optional, override for staging
    timeout_s=600,                        # optional, per-request timeout
    max_retries=5,                        # optional, set 0 to disable retries
)

v0.x → v1.0 migration

The v0.x surface (bb.submit, bb.runs.list, Run.data, Run.angles("knee")) is preserved as a thin shim — your existing code keeps working — but new code should target the v1 resource verbs (client.analyses.create, client.analyses.list, Analysis.metrics, Analysis.angles(joint="knee_R")). The v0.x shims will be removed in v2.0.

Contact

[e-mail] — onboarding, quota, bugs.

Docs: https://app.babon.eu/developers/docs