ElementTree(元素树)

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python

ElementTree就像一个轻量级的DOM，具有方便友好的API。代码可用性好，速度快，消耗内存少，这里主要
介绍ElementTree。

下面是例子：（这是一个jmeter执行结果jtl文件）

kmtest071009.xm<?xml version="1.0" encoding="UTF-8"?>
<testResults version="1.2">
<httpSample t="636" lt="636" ts="1437376387035" s="true" lb="HTTP??" rc="200" rm="OK" tn="??? 1-81" dt="text" by="288"/>
<httpSample t="1184" lt="1184" ts="1437376386488" s="true" lb="HTTP??" rc="200" rm="OK" tn="??? 1-46" dt="text" by="288"/>
<httpSample t="964" lt="964" ts="1437376386708" s="true" lb="HTTP??" rc="200" rm="OK" tn="??? 1-8" dt="text" by="288"/>
<httpSample t="648" lt="648" ts="1437376387024" s="true" lb="HTTP??" rc="200" rm="OK" tn="??? 1-80" dt="text" by="288"/>
<httpSample t="701" lt="701" ts="1437376386971" s="true" lb="HTTP??" rc="200" rm="OK" tn="??? 1-73" dt="text" by="288"/>
<httpSample t="983" lt="983" ts="1437376386689" s="true" lb="HTTP??" rc="200" rm="OK" tn="??? 1-16" dt="text" by="288"/>
<httpSample t="951" lt="951" ts="1437376386721" s="true" lb="HTTP??" rc="200" rm="OK" tn="??? 1-20" dt="text" by="288"/>
<httpSample t="955" lt="955" ts="1437376386717" s="true" lb="HTTP??" rc="200" rm="OK" tn="??? 1-63" dt="text" by="288"/>
</testResults>

1.加载xml文件

加载XML文件共有2种方法,一是加载指定字符串，二是加载指定文件

2.获取element的方法

a) 通过getiterator

b) 过 getchildren

c) find方法

d) findall方法

python事例

#!/usr/bin/evn python
#coding:utf-8
try:
    import xml.etree.cElementTree as ET
except ImportError:
    import xml.etree.ElementTree as ET
import sys

try:
    tree = ET.parse(r'kmtest071009.xml')
    #tree = ET.parse(r'country.xml')
#root = ET.fromstring(country_string)
    #tree = ET.parse(r'test.xml')
    root = tree.getroot()
    print root
    print root.tag
    print root.attrib
    print "-----------"
    #per=ET.parse(r'test.xml')
    p=tree.findall('httpSample')
    for x in p:
        print "x:", x.attrib
    print "new------"

#能取到
<httpSample t="955" lt="955" ts="1437376386717" s="true" lb="HTTP??" rc="200" rm="OK" tn="??? 1-63" dt="text" by="288"/> 这个中的值

    for oneper in p:
        #for child in oneper.getchildren():
            #print child.tag,':',child.text
        print 't:',oneper.get('t')
        print 'tl:',oneper.get('tl')
        print 'ts:',oneper.get('ts')
        print 's:',oneper.get('s')
        print 'lb:',oneper.get('lb')
        print 'rc:',oneper.get('rc')
        print 'rm:',oneper.get('rm')
        print 'tn:',oneper.get('tn')
        print 'dt:',oneper.get('dt')
        print 'by',oneper.get('by')

        print '############'
    #children = httpSample[0].getchildren()
    #print children
    #print "tag:",children[0].tag
    #print "text:",children[0][1].text
    #print "-----------"
    #print root[0][0].text
    print "find"
    children = root.find("httpSample")
    print children
    print "attrib:",children.attrib
    print "tag:",children.tag
    print "text:",children.text
    #print "-------------1"
    #print "attrib1:",children[0].attrib
    print "--------------1"
    #children = root.findall("httpSample/t")[0]
    #print children
    #print "attrib:",children[1].attrib
    #print "tag:",children[1].tag
    #print "text:",children[1].text
    p = tree.findall("httpSample")
    for x in p:
        print "x.attrib:",x.attrib
        #print "x.attrib.text:",x.attrib.text
        #print "lt:",p.get('lt')
except Exception, e:
    print "Error:cannot parse file:kmtest071009.xml."
    sys.exit(1)
#print root.tag, "---", root.attrib
#for child in root:
    #print child.tag, "---", child.attrib
    #print child.attrib[0]
print "11111111"
#childs = item.getchildren()
    #for subItem in childs:
        #:print subItem.get("ts")

显示运行结果：

new------
t: 636
tl: None
ts: 1437376387035
s: true
lb: HTTP??
rc: 200
rm: OK
tn: ??? 1-81
dt: text
by 288
############
t: 1184
tl: None
ts: 1437376386488
s: true
lb: HTTP??
rc: 200
rm: OK
tn: ??? 1-46
dt: text
by 288
############
t: 964
tl: None
ts: 1437376386708
s: true
lb: HTTP??
rc: 200
rm: OK
tn: ??? 1-8
dt: text
by 288
############
t: 648
tl: None
ts: 1437376387024
s: true
lb: HTTP??
rc: 200
rm: OK
tn: ??? 1-80
dt: text
by 288
############
t: 701
tl: None
ts: 1437376386971
s: true
lb: HTTP??
rc: 200
rm: OK
tn: ??? 1-73
dt: text
by 288
############
t: 983
tl: None
ts: 1437376386689
s: true
lb: HTTP??
rc: 200
rm: OK
tn: ??? 1-16
dt: text
by 288
############
t: 951
tl: None
ts: 1437376386721
s: true
lb: HTTP??
rc: 200
rm: OK
tn: ??? 1-20
dt: text
by 288
############
t: 955
tl: None
ts: 1437376386717
s: true
lb: HTTP??
rc: 200
rm: OK
tn: ??? 1-63
dt: text
by 288
############
find