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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_cursor(self):
        '''
        Yield a POSTGRES cursor
        '''
        _options = self._get_options()
        conn = psycopg2.connect(host=_options['host'],
                                user=_options['user'],
                                password=_options['pass'],
                                dbname=_options['db'],
                                port=_options['port'])
        cursor = conn.cursor()
        try:
            yield cursor
            log.debug('Connected to POSTGRES DB')
        except psycopg2.DatabaseError as err:
            log.exception('Error in ext_pillar POSTGRES: %s', err.args)
        finally:
            conn.close()