从XML python检索数据

Question

我试图遍历Google XML来检索大约6个字段。我正在使用Google提供的gdata为我的Google应用程序域中的用户配置文件提取XML提要。结果是：

<?xml version="1.0"?>
-<ns0:feed ns1:etag="W/"LIESANDCRAPfyt7I2A9WhHERE."" xmlns:ns4="http://www.w3.org/2007/app" xmlns:ns3="http://schemas.google.com/contact/2008" xmlns:ns2="http://a9.com/-/spec/opensearchrss/1.0/" xmlns:ns1="http://schemas.google.com/g/2005" xmlns:ns0="http://www.w3.org/2005/Atom">
    <ns0:updated>2012-01-25T14:52:12.867Z</ns0:updated>
    <ns0:category term="http://schemas.google.com/contact/2008#profile" scheme="http://schemas.google.com/g/2005#kind"/>
    <ns0:id>domain.com</ns0:id>
    <ns0:generator version="1.0" uri="http://www.google.com/m8/feeds">Contacts</ns0:generator>
    <ns0:author>
        <ns0:name>domain.com</ns0:name>
    </ns0:author>
    <ns0:link type="text/html" rel="alternate" href="http://www.google.com/"/>
    <ns0:link type="application/atom+xml" rel="http://schemas.google.com/g/2005#feed" href="https://www.google.com/m8/feeds/profiles/domain/domain.com/full"/>
    <ns0:link type="application/atom+xml" rel="http://schemas.google.com/g/2005#batch" href="https://www.google.com/m8/feeds/profiles/domain/domain.com/full/batch"/>
    <ns0:link type="application/atom+xml" rel="self" href="https://www.google.com/m8/feeds/profiles/domain/domain.com/full?max-results=300"/>
    <ns2:startIndex>1</ns2:startIndex>
    <ns2:itemsPerPage>300</ns2:itemsPerPage>
    <ns0:entry ns1:etag=""CRAPQR4KTit7I2A4"">
        <ns0:category term="http://schemas.google.com/contact/2008#profile" scheme="http://schemas.google.com/g/2005#kind"/>
        <ns0:id>http://www.google.com/m8/feeds/profiles/domain/domain.com/full/nperson</ns0:id>
        <ns1:name>
            <ns1:familyName>Person</ns1:familyName>
            <ns1:fullName>Name Person</ns1:fullName>
            <ns1:givenName>Name</ns1:givenName>
        </ns1:name>
        <ns0:updated>2012-01-25T14:52:13.081Z</ns0:updated>
        <ns1:organization rel="http://schemas.google.com/g/2005#work" primary="true">
            <ns1:orgTitle>JobField</ns1:orgTitle>
            <ns1:orgDepartment>DepartmentField</ns1:orgDepartment>
            <ns1:orgName>CompanyField</ns1:orgName>
        </ns1:organization>
        <ns3:status indexed="true"/>
        <ns0:title>Name Person</ns0:title>
        <ns0:link type="image/*" rel="http://schemas.google.com/contacts/2008/rel#photo" href="https://www.google.com/m8/feeds/photos/profile/domain.com/nperson"/>
        <ns0:link type="application/atom+xml" rel="self" href="https://www.google.com/m8/feeds/profiles/domain/domain.com/full/nperson"/>
        <ns0:link type="application/atom+xml" rel="edit" href="https://www.google.com/m8/feeds/profiles/domain/domain.com/full/nperson"/>
        <ns1:email rel="http://schemas.google.com/g/2005#other" address="nperson@gapps.domain.com"/>
        <ns1:email rel="http://schemas.google.com/g/2005#other" primary="true" address="nperson@domain.com"/>
        <ns4:edited>2012-01-25T14:52:13.081Z</ns4:edited>
    </ns0:entry>
    <ns0:title>domain.com's Profiles</ns0:title>
</ns0:feed>

我试图使用lxml来解析数据，但效果不太好，这是我的代码：

import atom
import gdata.auth
import gdata.contacts
import gdata.contacts.client
from lxml import etree
from lxml import objectify

email = 'admin@domain.com'
password = 'password'
domain = 'domain.com'

gd_client = gdata.contacts.client.ContactsClient(domain=domain)
gd_client.ClientLogin(email, password, 'profileFeedAPI')

profiles_feed = gd_client.GetProfilesFeed('https://www.google.com/m8/feeds/profiles/domain/domain.com/full?max-results=300')

def PrintFeed(feed):
  for i, entry in enumerate(feed.entry):
    print '\n%s %s' % (i+1, entry.title.text)

print(profiles_feed)
PrintFeed(profiles_feed)

profiles_feed2=(str(profiles_feed))

root = objectify.fromstring(profiles_feed2)

print root

print root.tag
print root.text

for e in root.entry():
    print e.tag
    print e.text

我可以让它返回feed然后进入，但是我不能再探索了。我只需要ns1名称中的名称字段和ns1组织中的组织字段的文本。我有点迷路了，所以非常感谢你的帮助。