(self,childId)
删除一个child 节点\n
        @param childId: Child ID
删除一个child 节点\n
删除一个child 节点 \ n
def dropChildByID(self,childId):
        '''删除一个child 节点\n
        @param childId: Child ID 
        '''
        try:
            del self._childs[childId]
        except Exception,e:
            log.msg(str(e))
def dropChildByID ( self , childId ) : try : del self . _childs [ childId ] except Exception , e : log . msg ( str ( e ) )