DMN/FEEL in Python

[mengwong]

If there's enough interest I'll try and turn them into pip installable modules and some documentation.

Nice work! I recently conducted a poll about adding DMN support to a number of popular languages and editors.

In my informal poll, Python topped the list: https://twitter.com/mengwong/status/1264118536064004096

To date, DMN implementations have involved a GUI saving to XML (either DMN or XLSX).

My twist: I'd like to propose DMN as Markdown tables, inline.

So the Python interface would be something like this:

var whatdish = dmnmd("""
| U | Season               | Guest Count | Dish (out)                   | # Annotation  |
|---|----------------------|-------------|------------------------------|---------------|
| 1 | Fall                 | <= 8        | Spareribs                    |               |
| 2 | Winter               | <= 8        | Roastbeef                    |               |
| 3 | Spring               | <= 4        | Dry Aged Gourmet Steak       |               |
| 4 | Spring               | [5..8]      | Steak                        |               |
| 5 | Fall, Winter, Spring | > 8         | Stew                         |               |
| 6 | Summer               | -           | Light Salad and a nice Steak | Hey, why not? |
""");

And then whatdish("Fall",4) returns "Spareribs"

Reinventing the wheel slightly, I spent the weekend writing a markdown table parser and FEEL evaluator in Haskell, so I know it can be done … as you've shown with your XLS parser and S/FEEL evaluator.

If this takes off we can imagine extending various IDEs' python modes to do markdown table editing as a submode sort of thing.

Thoughts?