Allow multiple nodes to return same output

Description

I want to visualize a particular pipeline in which multiple nodes point to same output. This gives me an error in the current version of kedro 0.17.4. Below is the error that I get:

Error: Output(s) ['target_1', 'target_2'] are returned by more than one nodes. Node outputs must be unique.

node(
        node_dummy_fun,
        inputs=["source_1"],
        outputs="target_1",
        name="job_id_x2",
    ),
node(
        node_dummy_fun,
        inputs=None,
        outputs="target_1",
        name="random",
    ),

Above nodes have different inputs and they point to same outputs.

Context

I just need to use Kedro viz for visualization of data-lineage and this scenario can benefit from this feature.

[CapTen101]

@datajoely Actually, I went into my virtual environment directory and commented the line of code there itself. This way it’ll work for all other visualization projects created inside that virtual environment.

[datajoely]

Well done! Since the constraint is on the Kedro core side rather than the Viz side, perhaps you want to look into generating the JSON yourself longer term?

You can see what Kedro generates using this command:

I’m going to close this issue since it’s an intended constraint on the core side - but Viz doesn’t really care!