def __init__(self, *args, **kwargs):
        if kwargs not in 'root_descriptor_id':
            kwargs['root_descriptor_id'] = -1
        DBRegistry.__init__(self, *args, **kwargs)

        self._conversions = dict()
        self._converters = set()

        self.set_defaults()
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/core/modules/module_registry.py/ModuleRegistry.__init__/swapped operands of `not in`