pyros-genmsg

library0.5.8pypypi✓ verified 88d ago

Standalone Python library for generating ROS message and service data structures for various languages. Current version 0.5.8, release cadence is sporadic.

devops

pip install pyros-genmsg

github ↗homepage ↗

INSTALL

IMPORT

SIG · PYROS-GENMSG

pyros-genmsg

devopspythonv0.5.8

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

genmsg

✓ import genmsg

The package provides the 'genmsg' module, not 'pyros_genmsg' or similar.

Import genmsg and use MsgSpec/FieldSpec to define message structures.

import genmsg from genmsg import MsgSpec, FieldSpec # Generate a simple message spec msg_spec = MsgSpec(types=['int32'], names=['x'], text='int32 x', full_name='test/Point2D') print(msg_spec)

Debug

Known issues

gotchaThis library does NOT include ROS 2 support (pyros-genmsg is for ROS 1 genmsg replacement). Do not use with ROS 2.

fix

Use 'ros2' packages or 'genmsg' from ROS 2 distro.

affects: all

deprecatedMsgSpec initialization signature changed in recent versions. Older examples may use positional args differently.

fix

Use keyword arguments: MsgSpec(types=[...], names=[...], text="...", full_name="...").

affects: >=0.4

gotchaThe library expects ROS package paths to be set via environment variable ROS_PACKAGE_PATH, which may not be available in standalone scripts.

fix

Set os.environ['ROS_PACKAGE_PATH'] to the directory containing your .msg files before calling generation functions.

affects: all

Errors

Common errors & fixes

ModuleNotFoundError: No module named 'genmsg'

The package is installed as pyros-genmsg but import uses 'genmsg'.

fix

pip install pyros-genmsg; then import genmsg.

AttributeError: module 'genmsg' has no attribute 'MsgSpec'

Very old version of genmsg (pre-0.4) where MsgSpec was named differently or not exposed.

fix

Upgrade pyros-genmsg to latest: pip install --upgrade pyros-genmsg.

ValueError: Invalid msg specification: 'int32 x'

Provided msg text does not follow ROS msg format (e.g., missing type/name pair).

fix

Ensure text uses ROS format: 'type name' per line, e.g., 'int32 x'.

Upgrade

Version history

0.5.8latest on PyPI · released Apr 18, 2019

Audit

Dependencies

No dependency data recorded yet.

Agent activity

2 hits · last 30 days

node

Resources

githubhttps://github.com/ros/genmsg ↗

homepagehttps://github.com/ros/genmsg ↗