PDDL Output

[mikand]

User Story

As a planning expert/enthusiast I want to be able to emit a PDDL representation of a planning problem modeled in the upf library to interoperate with an external planner manually.

For example, I want to dump a planning model that is generated from a TSB to include it in a planning competition or to experiment with an off-the-shelf planner that is not interfaced with the UPF

Acceptance Criteria

• [ ] The generated PDDL is acceptable by major planners in the category (for now, numeric and classical planners)
• [ ] If needed, options are provided to enable/disable specific dialects
• [ ] The PDDL can be saved to an actual file, showed on the screen or in file-like object for code-level reuse / network transmission

Additional Material

• https://github.com/remykarem/py2pddl
• http://users.cecs.anu.edu.au/~patrik/pddlman/writing.html
• https://planning.wiki/ref/pddl
• http://editor.planning.domains/

An interface like

from upf.io import PDDLPrinter
printer = PDDLPrinter(problem) 
printer.write_domain("domain.pddl")
printer.write_problem("instance.pddl")

could be suitable.

Attention Points

• Using a template library like Jinja could be a good idea
• Avoid writing a "valley of prints"
• Avoid excessive string concatenation (i.e., a + " - " + b)

[haz]

Again, tarski to the rescue ;)

• https://tarski.readthedocs.io/en/latest/notebooks/defining-your-first-planning-problem.html
• http://mulab.ai/tarski/io/fstrips.html#tarski.io.fstrips.FstripsWriter.write

We have some decent experience in building domains/problems dynamically, and then writing out to PDDL.