launch.launch_description_sources.frontend_launch_description_source module

Module for the FrontendLaunchDescriptionSource class.

class launch.launch_description_sources.frontend_launch_description_source.FrontendLaunchDescriptionSource

Bases: LaunchDescriptionSource

Encapsulation of a declarative (markup based) launch file.

It can be loaded during launch using an IncludeLaunchDescription action.

__init__(launch_file_path: str | ~launch.substitution.Substitution | ~typing.Iterable[str | ~launch.substitution.Substitution], *, method: str = 'interpreted frontend launch file', parser: ~typing.Type[~launch.frontend.parser.Parser] = <class 'launch.frontend.parser.Parser'>) → None

Create a FrontendLaunchDescriptionSource.

The given file path should be to a launch frontend style file (like xml or yaml). If a relative path is passed, it will be relative to the current working directory wherever the launch file was run from.

Parameters:

• launch_file_path – the path to the launch file. It can be made up of Substitution instances which are expanded when get_launch_description() is called.

• parser – an specific parser implementation