xml类的封装

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# coding=UTF-8
import xml.etree.ElementTree as ET
import traceback

#封装自己的xml解析工具类
#创建时传入文件路径
#根据传入的XPath表达式获取结果，返回集合

class XML:
    def __init__(self,path):
        self.path = path
        try:
            #根节点
            self.root = ET.parse(self.path)
        except:
            print u'待解析文件加载异常，未找到根节点'+traceback.print_exc()
            self.root = None

    def getElementText(self,xpath):
        result = None
        if self.root is not None:
            try:
                element = self.root.find(xpath)
                result = element.text
            except:
                print u'未找到对象'+xpath
                traceback.print_exc()
        return result


    def getElementAttrib(self,xpath,attr_name):
        result = None
        if self.root is not None:
            try:
                element = self.root.find(xpath)
                result = element.attrib[attr_name]
            except:
                print u'未找到对象'+xpath
                traceback.print_exc()
        return result

    # def getElements(self,xpath):
    #     if self.root is not None:
    #         try:
    #             elements = self.root.findall(xpath)
    #             result = []
    #             for element in elements:
    #                 return result.append(element)
    #         except:
    #             print u'未找到对象'+xpath
    #             traceback.print_exc()