constant keyword a graph ?

[maxenceprog]

Could we add a 'constant' keyword in ewoks graph like

Imagine i have node1 a Task_A with outputs : OUT_0,

Imagine i have:

• node1 is Task1
• node2 is Task2
• node3 is Task2

- Task1
   inputs:
        C
   outputs:
        A

- Task2

   inputs:
       C
       A
   outputs:
       B


- Link1
    A -> B

workflow = {
"constants":
{
"C": "a value"
}
"nodes": [node1, node2],
"links": [link1],
"graph": ...,
}

This may simplify some graph ?

Maybe there is already a feature in graph that allow to do that ?

One use-case :

Create a "constants" or "set up" tool in Orange that allow user to set up these constant before to do anything

But maybe this is breaking the workflow philosophy ?

[woutdenolf]

Related to #437

The idea would be that you define "workflow inputs" and "workflow outputs"

{
    "graph": {
        "inputs": [
            {"name": "C", "target_ids":["task1", "task2", ["subgraph", "subtask1"]]},  # target nodes
            {"name": "Cbis", "target_name": "Cdest"},  # target nodes with Cdest as input
            {"name": "Ctris"},  # target nodes with Ctris as input
        ]
    }
}