Method Error in Notebook example

[jmatsushita]

Hi there,

I'm trying to run this example notebook in VS Code. I'm using the Julia 1.8.3 kernel and I've just did add AlgebraicRelations in the package manager.

When I run the second cell (the using first cell runs) I get the following error:

MethodError: no method matching present_to_schema(::Presentation{Catlab.Theories.ThSymmetricMonoidalCategory, Symbol})
Closest candidates are:
  present_to_schema(!Matched::Symbol, !Matched::Symbol) at ~/.julia/packages/AlgebraicRelations/VrfVu/src/Presentations.jl:48

Stacktrace:
 [1] top-level scope
   @ ~/dev/workshop/julia/AlgebraicRelations.jl/examples/ml_workflow_demo/ml_demo.ipynb:18

I'm new to both Julia and the Catlab ecosystem, so apologies if I've missed something obvious!

Cheers,

Jun

[jmatsushita]

I think I found the problem.

• Looking at this test it seems that the way to call present_to_schema is to use the macro
• If I replace
  TrainDB = present_to_schema(present);
  with
  @present_to_schema TrainDB(present);
  the cell runs correctly and draws the schema.

I'll submit a PR to fix the notebook.

[epatters]

Hi, thanks for tracking down this problem and suggesting a fix. This package has been without a maintainer for a little while, but @TheCedarPrince is going to start working on it, beginning with the big refactor in #31. It may take awhile to triage these issues. Thanks for your interest and your patience!

[TheCedarPrince]

Yup! I am ramping up on this and will come back to this error @jmatsushita -- sorry you ran into problems! Like @epatters , I'll be picking up with a major refactor and then can revisit not only this issue but others that are outstanding. Thanks for coming through! If you have any more questions, feel free to also follow-up with us in Zulip