ldfparser
LDF Language support for Python
Decision gist · record as of 2026-08-14
Yes, if you work with LIN bus protocols and LDF files in automotive or embedded contexts. The package has low install friction, permissive licensing, and no known vulnerabilities. However, be aware that maintenance is aging (last release 564 days ago) and the library is pre-release, so pin versions in production and test upgrades carefully. Not relevant for general-purpose Python development.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires a valid LDF file; the library is in pre-release state, so breaking changes may occur between minor versions—pin to exact version in production.
- Low install friction with three straightforward dependencies (lark, bitstruct, jinja2).
- Maintenance status is aging—last release was 564 days ago—so expect slower response to issues, though the repository remains active and not archived.
License · maintenance · safety
MIT (permissive) — MIT license permits commercial and private use with minimal restrictions; you may use, modify, and distribute the package freely provided you include the original license notice.
last release 2025-01-27 (564 days) · last repo commit 2025-12-09 · 86 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 1,399,749 downloads/mo, #3,953 on PyPI
Alternatives
Verify before relying
pip install ldfparser
import ldfparser
ldf = ldfparser.parse_ldf(path="network.ldf")
frame = ldf.get_unconditional_frame('Frame_1')
message = frame.encode_raw({"Signal_1": 123, "Signal_2": 0})- Whether the library successfully parses all real-world LDF files that conform to LIN 1.3, 2.0, 2.1, or 2.2A standards, or if compatibility gaps remain.
- Current state of checksum calculation for frames (listed as a known missing feature in the description).
- Stability and completeness of the experimental LDF save-to-file feature.
What it is and what it does
ldfparser reads LIN Description Files and extracts their signal and frame metadata, then uses those definitions to encode raw signal values into binary messages and decode binary messages back into signal dictionaries. It implements the LIN protocol standards (1.3, 2.0, 2.1, 2.2A) and provides both programmatic and command-line interfaces for working with LDF files.
The package depends on lark for parsing, bitstruct for bit-level encoding/decoding, and jinja2 for templating. It is designed for automotive and embedded systems work where LIN bus communication requires translating between human-readable signal names and their binary representations. The library is still pre-release, so breaking changes can occur between minor versions; production use should pin to a specific version and test before upgrading.
Use it for
- Decode raw CAN/LIN bus messages captured from a vehicle into human-readable signal values for analysis or logging.
- Encode signal commands (e.g., motor RPM, fan state) into binary frames for transmission over a LIN bus.
- Extract signal definitions and metadata from LDF files to build protocol documentation or validation tools.
- Validate LDF file syntax and semantic correctness before using it in production automotive systems.
- Automate conversion between LDF and other formats (e.g., JSON) for integration with external tools.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you work with LIN bus protocols and LDF files in automotive or embedded contexts.
The package has low install friction, permissive licensing, and no known vulnerabilities. However, be aware that maintenance is aging (last release 564 days ago) and the library is pre-release, so pin versions in production and test upgrades carefully. Not relevant for general-purpose Python development.
Install
ldfparser on PyPI
Before you install
Low install friction with three straightforward dependencies (lark, bitstruct, jinja2). Maintenance status is aging—last release was 564 days ago—so expect slower response to issues, though the repository remains active and not archived.
Requires a valid LDF file; the library is in pre-release state, so breaking changes may occur between minor versions—pin to exact version in production.
License in practice
MIT license permits commercial and private use with minimal restrictions; you may use, modify, and distribute the package freely provided you include the original license notice.
Quickstart
pip install ldfparser
import ldfparser
ldf = ldfparser.parse_ldf(path="network.ldf")
frame = ldf.get_unconditional_frame('Frame_1')
message = frame.encode_raw({"Signal_1": 123, "Signal_2": 0})Verify before relying
- Whether the library successfully parses all real-world LDF files that conform to LIN 1.3, 2.0, 2.1, or 2.2A standards, or if compatibility gaps remain.
- Current state of checksum calculation for frames (listed as a known missing feature in the description).
- Stability and completeness of the experimental LDF save-to-file feature.
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release !=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,<4 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 3 packageslarkbitstructjinja2 |
| Maintenance | Aging 564 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 1,399,749 / month, #3,953 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | License :: OSI Approved :: MIT LicenseOperating System :: OS IndependentProgramming Language :: Python :: 3.6Programming Language :: Python :: 3.7Programming Language :: Python :: 3.8Programming Language :: Python :: 3.9 |
Evidence: ldfparser-0.26.0-py3-none-any.whl
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See also bbpb · cantools · asammdf · rf-protocols · odxtools · canmatrix · pylzss · decord · pamqp · pylspci