Consider making it check the imports after generating any new code and either directly add it or tab to it. Cursor already knows I’m missing it because it will immediately autocomplete the import as soon as I move my caret to the end of the list of inputs (in this case “from io import StringIO”).
Granted, if I ask composer to do the same thing, in this case: “take a dataframe and drop it onto the existing s3 bucket”, it will add the import I was missing.