Hey. I have an op with an unconnected input defined as follows:

@op(
...
ins={"df": In(input_manager_key="io_manager")}
)
def op_fn(context, df: DataFrame):
    ...

Where

"io_manager"

is an io manager with a

load_input

function. However, this raises a code location error:

DagsterInvalidDefinitionError: Input 'df' of op 'op_fn' has no way of being resolved. Must provide a resolution to this input via another op/graph, or via a direct input value mapped from the top-level graph. To learn more, see the docs for unconnected inputs: <https://docs.dagster.io/concepts/io-management/unconnected-inputs#unconnected-inputs>.

Any ideas on what I’m missing? It looks valid in comparison to the linked docs

Hi! could you elaborate a bit more? was the type hint incorrect? seems like we could raise a more helpful error message here

Sure thing! I got the error when I passed the type hint:

df: DataFrame

- I suppose that by giving it a type hint in the arguments instead of in the

In

object it didn’t connect the unconnected input with the argument provided

ahh ok that makes sense. thanks for the clarification! i’ll see if this is something we can catch earlier and give better error messaging around

Always happy to help. Thanks for your continued support daggy love