manyi/venv/Lib/site-packages/nbconvert/tests/exporter_entrypoint/eptest.py

from nbconvert.exporters import Exporter

class DummyExporter(Exporter):
    pass

class DummyScriptExporter(Exporter):
    def from_notebook_node(self, nb, resources=None, **kw):
        return 'dummy-script-exported', resources