xml是實現(xiàn)不同語言或程序之間進行數(shù)據(jù)交換的協(xié)議，跟json差不多，但json使用起來更簡單，不過，古時候，在json還沒誕生的黑暗年代，大家只能選擇用xml呀，至今很多傳統(tǒng)公司如金融行業(yè)的很多系統(tǒng)的接口還主要是xml。

xml的格式如下，就是通過<>節(jié)點來區(qū)別數(shù)據(jù)結(jié)構(gòu)的:

<?xml version='1.0'?><data> <country name='Liechtenstein'> <rank updated='yes'>2</rank> <year>2008</year> <gdppc>141100</gdppc> <neighbor name='Austria' direction='E'/> <neighbor name='Switzerland' direction='W'/> </country> <country name='Singapore'> <rank updated='yes'>5</rank> <year>2011</year> <gdppc>59900</gdppc> <neighbor name='Malaysia' direction='N'/> </country> <country name='Panama'> <rank updated='yes'>69</rank> <year>2011</year> <gdppc>13600</gdppc> <neighbor name='Costa Rica' direction='W'/> <neighbor name='Colombia' direction='E'/> </country></data>二、Python使用xml

xml協(xié)議在各個語言里的都 是支持的，在python中可以用以下模塊操作xml：

# print(root.iter(’year’)) #全文搜索# print(root.find(’country’)) #在root的子節(jié)點找，只找一個# print(root.findall(’country’)) #在root的子節(jié)點找，找所有import xml.etree.ElementTree as ETtree = ET.parse('xmltest.xml')root = tree.getroot()print(root.tag)#遍歷xml文檔for child in root: print(’========>’, child.tag, child.attrib, child.attrib[’name’]) for i in child: print(i.tag, i.attrib, i.text)#只遍歷year 節(jié)點for node in root.iter(’year’): print(node.tag, node.text)#---------------------------------------import xml.etree.ElementTree as ETtree = ET.parse('xmltest.xml')root = tree.getroot()#修改for node in root.iter(’year’): new_year = int(node.text) + 1 node.text = str(new_year) node.set(’updated’, ’yes’) node.set(’version’, ’1.0’)tree.write(’test.xml’)#刪除nodefor country in root.findall(’country’): rank = int(country.find(’rank’).text) if rank > 50: root.remove(country)tree.write(’output.xml’)#在country內(nèi)添加（append）節(jié)點year2import xml.etree.ElementTree as ETtree = ET.parse('a.xml')root = tree.getroot()for country in root.findall(’country’): for year in country.findall(’year’): if int(year.text) > 2000: year2 = ET.Element(’year2’) year2.text = ’新年’ year2.attrib = {’update’: ’yes’} country.append(year2) #往country節(jié)點下添加子節(jié)點tree.write(’a.xml.swap’)三、自己創(chuàng)建xml文檔

import xml.etree.ElementTree as ETnew_xml = ET.Element('namelist')name = ET.SubElement(new_xml, 'name', attrib={'enrolled': 'yes'})age = ET.SubElement(name, 'age', attrib={'checked': 'no'})sex = ET.SubElement(name, 'sex')sex.text = ’33’name2 = ET.SubElement(new_xml, 'name', attrib={'enrolled': 'no'})age = ET.SubElement(name2, 'age')age.text = ’19’et = ET.ElementTree(new_xml) #生成文檔對象et.write('test.xml', encoding='utf-8', xml_declaration=True)ET.dump(new_xml) #打印生成的格式

以上就是python xml模塊的簡單使用的詳細(xì)內(nèi)容，更多關(guān)于python xml模塊使用的資料請關(guān)注好吧啦網(wǎng)其它相關(guān)文章！