metricchrono 0.4.0

Python bindings for the MetricChrono Rust C ABI

MetricChrono Python

Production Python bindings for the same metricchrono-ffi native library used by the Rust and C APIs.

When building a wheel from the repository, the package build runs Cargo and bundles the platform native library into the wheel:

python3 -m pip wheel bindings/python --no-deps -w /tmp/metricchrono-wheel
python3 -m pip install /tmp/metricchrono-wheel/metricchrono-0.2.0-*.whl

Cargo must be available for source builds. To use the wrapper directly from the source tree without installing a wheel, build the native library from the repository root:

cargo build -p metricchrono-ffi --release

Then point Python at the library if it is not installed in a standard dynamic loader path:

export METRICCHRONO_FFI_LIB=target/release/libmetricchrono_ffi.dylib

Use .so on Linux and .dll on Windows.

Example

import metricchrono as mc

ladder = mc.geometric_ladder(0.5, 1.0, 2.0, 4, 0.5, 1.0)
print(mc.ladder_distance(3.0, ladder))

with mc.EventLog(2) as log:
    log.append(10, [1.0, 0.0])
    log.append(11, [1.0, 1.0])
    print(log.next_event(0, 0))

API Surface

• Kernel and ladders: Tier, tick_distance, ladder_distance, geometric_ladder, Ladder.
• Serialization: tier_from_schema, tier_to_schema, ladder_from_schema, ladder_to_schema, tick_vector_from_schema, tick_vector_to_schema, consensus_result_from_schema.
• Smooth and adaptive helpers: smooth_tick_distance, smooth_ladder_distance, adaptive_ladder_distance, ZoomDecision.
• Event memory: EventLog.
• Consensus: weighted_consensus, coherence_residuals, simple_weight_update.

Verify

PYTHONPATH=bindings/python METRICCHRONO_FFI_LIB=target/release/libmetricchrono_ffi.dylib \
  python3 bindings/python/tests/golden.py
python3 -m pip install build
python3 -m build bindings/python --sdist --outdir /tmp/metricchrono-sdist
python3 -m pip wheel /tmp/metricchrono-sdist/metricchrono-0.2.0.tar.gz --no-deps -w /tmp/metricchrono-wheel