{
    "name"  : "检查物理口是否插线",
	"precondition" : ["physicalPort", "dailPort"],
    "problems" : {
        "localDefend" : {
            "desc"      : "【问题】物理口未插线",
            "advice"    : "【建议】请检查线路" 
        }
    }
}

---------------------------code-------------------------------

physicalPort = precondition('physicalPort')
print physicalPort