turndb for Python

The Python SDK is a thin PyO3 shell over TurnDB's single-file engine. It uses the same capability and structured-query contract as Rust and Node. One dedicated Rust actor owns each writer, so Python threads never concurrently enter mutable engine state.

from turndb import Store

db = Store.open("agent.turndb")
db.write([{"kind": "put", "id": "trace/1", "attrs": [], "contents": []}], durable=True)
db.seal("agent-snapshot.turndb")
db.close()

Attributes, writes, scan requests, and scan results use the canonical data shapes in conformance/v1/query.schema.json. Content bytes in those serializable shapes are base64. The direct read_content() convenience returns bytes.

OpenTelemetry is the Tier-2 entrance. With an SDK provider already configured, tracing to one local file is two lines:

exporter = TurnDbSpanExporter("agent.turndb")
provider.add_span_processor(BatchSpanProcessor(exporter))

The exporter durably acknowledges each export by default, publishes after 512 spans or five seconds, and always syncs and flushes on force_flush() and shutdown().

Provider SDKs remain optional. trace_gen_ai_call() and trace_gen_ai_call_async() wrap any client closure in the canonical gen_ai CLIENT span, move input/output message arrays onto the content-bearing attributes consumed by the exporter, and preserve the exact return value or exception.

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turndb for Python

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