liblrs-python 0.2.5

Python bindings for liblrs: a library to work with linear referencing systems

LibLRS Python

Expose liblrs through pyO3.

Usage

Simply add liblrs-python to your dependencies.

import liblrs_python as lrs

plm = lrs.Lrs(open("path_to_your_lrs_file", "rb").read())

# We build a dict mapping for each LRM id to its handle
lrms = {plm.get_lrm_scale_id(i): i for i in range(plm.lrm_len())}

# We find the handle for the Via Aurelia (https://en.wikipedia.org/wiki/Via_Aurelia)
via_aurelia_handle = [v for k,v in lrms.items() if k.startswith("Via Aurelia")][0]

# We define two measures meaning “100 passus after milestone 50”
# (passus = step in latin, could be any measurement unit)
a = lrs.LrmScaleMeasure("50", 100)
b = lrs.LrmScaleMeasure("60", 200)

# Get the coordinates between those two measures
coordinates = [[p.x, p.y] for p in plm.resolve_range(via_aurelia_handle, a, b)]

Developpment

Create your virtualenv and install maturin:

python -m venv venv-liblrs
source venv-liblrs/bin/activate
pip install
maturin develop

Bindings with PyO3 to liblrs

Publishing

We publish the library to PYPI running:

docker run --rm -e MATURIN_PYPI_TOKEN=PYPI_key -w /io/python -v $(pwd)/..:/io ghcr.io/pyo3/maturin publish