osrm-bindings 0.1.0

Python bindings for the osrm-backend project

osrm-bindings

osrm-bindings is a Python package that binds to osrm-backend using nanobind.

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PyPI Supported Platforms

Platform	Arch
Linux	x86_64
MacOS	x86_64
Windows	x86_64

On PyPI we only distribute abi3 wheels for each platform, i.e. one needs at least Python 3.12 to install the wheels. Of course it'll fall back to attempt an installation from source.

Installation

osrm-bindings is (likely, didn't check) supported from CPython 3.10+ on, and can be installed from source via running the following command in the source folder:

pip install .

OSRM Version

When building from source, the OSRM upstream version is controlled by OSRM_GIT_REPO & OSRM_GIT_TAG in pyproject.toml:

[tool.scikit-build.cmake.define]
OSRM_GIT_REPO = "https://github.com/nilsnolde/osrm-backend"
OSRM_GIT_TAG = "de8a9da93aa09a4943d3964f0fb378a01a66af49"

This accepts any git commit hash, branch name, or tag. To override it without editing the file, pass it as a config setting at install time:

pip install . --config-settings cmake.define.OSRM_GIT_TAG=<commit/tag/branch>

Example

The following example will showcase the process of calculating routes between two coordinates.

First, import the osrm library, and instantiate an instance of OSRM:

import osrm

# Instantiate osrm_py instance
osrm_py = osrm.OSRM("./tests/test_data/ch/monaco.osrm")

Then, declare RouteParameters, and then pass it into the osrm_py instance:

# Declare Route Parameters
route_params = osrm.RouteParameters(
    coordinates = [(7.41337, 43.72956), (7.41546, 43.73077)]
)

# Pass it into the osrm_py instance
res = osrm_py.Route(route_params)

# Print out result output
print(res["waypoints"])
print(res["routes"])

Type Stubs

The file src/osrm/osrm_ext.pyi contains auto-generated type stubs for the C++ extension module. These are used by IDEs for autocompletion and by mkdocstrings to build documentation without compiling the extension.

After changing C++ bindings, rebuild the project to regenerate the stubs:

pip install -e .

Then commit the updated .pyi file. CI will verify that committed stubs are up to date.

Documentation

Documentation Page