xml是實(shí)現(xiàn)不同語言或程序之間進(jìn)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(shí)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。

1、xml的格式如下，就是通過<>節(jié)點(diǎn)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>

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

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) for i in child: print(i.tag,i.text) #只遍歷year 節(jié)點(diǎn) for node in root.iter('year'): print(node.tag,node.text)

修改和刪除xml文檔內(nèi)容

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") tree.write("xmltest.xml") #刪除node for country in root.findall('country'): rank = int(country.find('rank').text) if rank > 50: root.remove(country) tree.write('output.xml')

3、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(duì)象 et.write("test.xml", encoding="utf-8",xml_declaration=True) ET.dump(new_xml) #打印生成的格式

轉(zhuǎn)載于:https://www.cnblogs.com/xudachen/p/8488114.html

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