Pylint complains about missing arguments when using the solid DSL to define pipelines

e.g.:

from dagster import pipeline, solid


@solid
def hello_world(_):
    return 'hello'

@pipeline
def hello_world_pipeline():
    hello_world()

gives the pylint error: No value for argument '_' in function callpylint(no-value-for-parameter)

This is probably something we can fix with an astroid “brain hint”. See: https://stackoverflow.com/questions/38087760/pylint-coroutines-decorators-and-type-inferencing. Docs are lacking, we would have to work from examples in https://github.com/PyCQA/astroid/tree/master/astroid/brain. Something like (this code doesn’t work):

import astroid

def _is_decorated_solid(node):
    if not node.decorators:
        return False
    return 'dagster.core.definitions.decorators.solid' in node.decoratornames()

@astroid.inference_tip
def _infer_decorated_solid(node, context=None):
    _args = node.args
    _args.defaults = [astroid.nodes.Const(None) for arg in _args]
    node.args = _args
    return node


astroid.MANAGER.register_transform(
    astroid.FunctionDef,
    _infer_decorated_solid,
    _is_decorated_solid
)

[mgasner]

Lol, or, just wait for https://github.com/PyCQA/pylint/pull/2926 to merge

[natekupp]

@mgasner this is resolved now right?