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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 _set_zfcp_config_files(self, fcp, target_wwpn, target_lun):
 """rhel6 set WWPN and LUN in configuration files"""

        device = '0.0.%s' % fcp
        set_zfcp_conf = 'echo "%(device)s %(wwpn)s %(lun)s" >> /etc/zfcp.conf'\
                        % {'device': device, 'wwpn': target_wwpn,
                           'lun': target_lun}
        trigger_uevent = 'echo "add" >> /sys/bus/ccw/devices/%s/uevent\n'\
                         % device
        return '\n'.join((set_zfcp_conf,
                          trigger_uevent))