Hi, When running a composite_solid we need to output 2 objects. if we run with

@composite_solid(

output_defs=[OutputDefinition(name='path', dagster_type=String),

OutputDefinition(name='dataframe', dagster_type=DataFrame),

])

def my_solid():

...

path = solid_return_path()

dataframe = solid_return_dataframe()

yield Output (path, 'path')

yield Output (dataframe, 'dataframe')

we get the following error:

dagster.core.errors.DagsterInvalidDefinitionError: @composite_solid my_solid returned problematic value of type <class 'generator'>. Expected return value from invoked solid or dict mapping output name to return values from invoked solids.

If we change it to :

return path, dataframe

the pipeline runs. Any suggestions?

@composite_solid

is not actually invoked at run time - like

@pipeline

its purpose is to just create a DAG structure which we do by evaluating the function at init time.

return path, dataframe

will do what you want I believe. It will map based on order to the

output_defs

this is a bad error message