Retrieve set of inputs and outputs connecting steps.

def _get_step_inout(step):
    """Retrieve set of inputs and outputs connecting steps.
    """
    inputs = []
    outputs = []
    assert step.inputs_record_schema["type"] == "record"
    for inp in step.inputs_record_schema["fields"]:
        source = inp["source"].split("#")[-1].replace("/", ".")
        # Check if we're unpacking from a record, and unpack from our object
        if "valueFrom" in inp:
            attr_access = "['%s']" % inp["name"]
            if inp["valueFrom"].find(attr_access) > 0:
                source += ".%s" % inp["name"]
        inputs.append({"id": inp["name"], "value": source})
    assert step.outputs_record_schema["type"] == "record"
    for outp in step.outputs_record_schema["fields"]:
        outputs.append({"id": outp["name"]})
    return inputs, outputs