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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _get_catalog_idstrs(self):
 """Returns the proper list of catalog idstrs based on catalog view"""

        if self._catalog_view == ISOLATED:
            return [str(self._catalog_id)]
        else:
            return self._get_descendent_cat_idstrs(self._catalog_id)