Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Dagster 0.9.18: @pipeline 'pipeline' has unmapped output 'result'. (my return type is `-> None`)

See original GitHub issue

Hi,

I’m trying to update dagster to the latest version in my pipeline and I’m getting this error because my pipeline function is annotated with -> None as the return type.

The error disappears if I remove the return type, but that would make mypy unhappy (and #type: ignore doesn’t work well with annotated functions).

Should the error be raised if the return type is None? If yes is there any workaround you can suggest? I’d prefer not disabling mypy if possible.

Issue Analytics

State:
Created 3 years ago
Comments:9 (9 by maintainers)

Top GitHub Comments

1reaction

alangenfeldcommented, Nov 12, 2020

fix linked above will go out in the release today

1reaction

amarrellacommented, Nov 12, 2020

Thanks! The speed at which you folks work is incredible!

Top Results From Across the Web

Ops - Dagster Docs

Input and output management: Ops have defined inputs and outputs, analogous to the arguments and return value(s) of a Python function. An input...

dagster Changelog - pyup.io

Fixed a bug where the re-execute button on runs of asset jobs would incorrectly show warning icon, indicating that the pipeline code may...

View Options

Some Dagster packages have more involved test configs or support only certain Python version; ... yield Output(value=table_name, output_name="result").

Dagster with User Code Deployments (gRPC)

Dagster is an open source data orchestrator for machine learning, analytics, and ETL that makes your pipelines more reliable and robust.

How to use the dagster.check.failed function in dagster - Snyk

To help you get started, we've selected a few dagster examples, based on popular ways it is used in public projects. Secure your...