嗨我有这个xml，我希望获得与每个Branch元素的Name和Type以及FullProductName字符串元素相关的字符串（＆＃34; Cisco Unified Computing System（管理软件）3.0（1）c＆＃34; ）。我正在尝试使用bs4进行python。但我不知道我该怎么做。
XML：
<?xml version="1.0" encoding="UTF-8"?>
<cvrfdoc xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.icasi.org/CVRF/schema/cvrf/1.1">
<DocumentTitle>Cisco Integrated Management Controller Remote Code Execution Vulnerability</DocumentTitle>
<DocumentType>Cisco Security Advisory</DocumentType>
<DocumentPublisher Type="Vendor">
<ContactDetails>Emergency Support:
+1 877 228 7302 (toll-free within North America)
+1 408 525 6532 (International direct-dial)
Non-emergency Support:
Email: psirt@cisco.com
Support requests that are received via e-mail are typically acknowledged within 48 hours.</ContactDetails>
<IssuingAuthority>Cisco product security incident response is the responsibility of the Cisco Product Security Incident Response Team (PSIRT). The Cisco PSIRT is a dedicated, global team that manages the receipt, investigation, and public reporting of security vulnerability information that is related to Cisco products and networks. The on-call Cisco PSIRT works 24x7 with Cisco customers, independent security researchers, consultants, industry organizations, and other vendors to identify possible security issues with Cisco products and networks.
More information can be found in Cisco Security Vulnerability Policy available at http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html</IssuingAuthority>
</DocumentPublisher>
<DocumentTracking>
<Identification>
<ID>cisco-sa-20170419-cimc3</ID>
</Identification>
<Status>Final</Status>
<Version>1.2</Version>
<RevisionHistory>
<Revision>
<Number>1.0</Number>
<Date>2017-04-18T16:50:37</Date>
<Description>Initial public release.</Description>
</Revision>
<Revision>
<Number>1.1</Number>
<Date>2017-05-22T17:55:14</Date>
<Description>Updated affected products.</Description>
</Revision>
<Revision>
<Number>1.2</Number>
<Date>2017-05-31T20:33:19</Date>
<Description>Added vulnerable releases.</Description>
</Revision>
</RevisionHistory>
<InitialReleaseDate>2017-04-19T16:00:00</InitialReleaseDate>
<CurrentReleaseDate>2017-05-31T20:33:19</CurrentReleaseDate>
<Generator>
<Engine>TVCE</Engine>
</Generator>
</DocumentTracking>
<DocumentNotes>
<Note Title="Summary" Type="General" Ordinal="1">A vulnerability in the web-based GUI of Cisco Integrated Management Controller (IMC) could allow an unauthenticated, remote attacker to perform unauthorized remote command execution on the affected device.
The vulnerability exists because the affected software does not sufficiently sanitize specific values that are received as part of a user-supplied HTTP request. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected software. Successful exploitation could allow an unauthenticated attacker to execute system commands with root-level privileges.
There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-cimc3 ["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-cimc3"]</Note>
<Note Title="CVSS 3.0 Notice" Type="Other" Ordinal="2">Although CVRF version 1.1 does not support CVSS version 3, the CVSS score in this CVRF file is a CVSSv3 base and temporal score, as Cisco is now scoring vulnerabilities in CVSSv3.</Note>
</DocumentNotes>
<DocumentReferences>
<Reference Type="Self">
<URL>https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-cimc3</URL>
<Description>Cisco Integrated Management Controller Remote Code Execution Vulnerability</Description>
</Reference>
</DocumentReferences>
<ProductTree xmlns="http://www.icasi.org/CVRF/schema/prod/1.1">
<Branch Name="Cisco" Type="Vendor">
<Branch Name="Cisco Unified Computing System (Management Software)" Type="Product Name">
<Branch Name="3.0" Type="Product Version">
<Branch Name="(1)c" Type="Service Pack">
<FullProductName ProductID="CVRFPID-203522">Cisco Unified Computing System (Management Software) 3.0(1)c</FullProductName>
</Branch>
</Branch>
</Branch>
</Branch>
</ProductTree>
<Vulnerability Ordinal="1" xmlns="http://www.icasi.org/CVRF/schema/vuln/1.1">
<Title>Cisco Integrated Management Controller Remote Code Execution Vulnerability</Title>
<ID SystemName="Cisco Bug ID">CSCvd14578</ID>
<Notes>
<Note Title="Summary" Type="Summary" Ordinal="1">A vulnerability in the web-based GUI of Cisco Integrated Management Controller (IMC) could allow an unauthenticated, remote attacker to perform unauthorized remote command execution on the affected device.
The vulnerability exists because the affected software does not sufficiently sanitize specific values that are received as part of a user-supplied HTTP request. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected software. Successful exploitation could allow an unauthenticated attacker to execute system commands with root-level privileges.</Note>
<Note Title="Cisco Bug IDs" Type="Other" Ordinal="3">CSCvd14578</Note>
</Notes>
<CVE>CVE-2017-6616</CVE>
<ProductStatuses>
<Status Type="Known Affected">
<ProductID>CVRFPID-203522</ProductID>
</Status>
</ProductStatuses>
<CVSSScoreSets>
<ScoreSet>
<BaseScore>9.8</BaseScore>
<Vector>CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H</Vector>
</ScoreSet>
</CVSSScoreSets>
<Remediations>
<Remediation Type="Workaround">
<Description>There are no workarounds that address this vulnerability.</Description>
</Remediation>
</Remediations>
<References>
<Reference Type="Self">
<URL>https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-cimc3</URL>
<Description>Cisco Integrated Management Controller Remote Code Execution Vulnerability</Description>
</Reference>
</References>
</Vulnerability>
</cvrfdoc>
的Python：
from bs4 import BeautifulSoup
xmlData = open("test.xml")
soup = BeautifulSoup(xmlData, "lxml")
preoductTree = soup.producttree
vendor = preoductTree.find_all("branch", attrs={"type": "Vendor"})
有什么想法吗？
提前谢谢。
答案 0 :(得分：1)
所以你必须先找到标签，这样我们才能遍历文件。我将使用固有的python xml包。
import xml.etree.ElementTree as ET
tree = ET.parse('test.xml')
root = tree.getroot()
然后让我们找到第一个子标记，以便我们可以浏览该文件。
for child in root:
print child.tag, child.attrib
>>{http://www.icasi.org/CVRF/schema/prod/1.1}Branch, {'Type': 'Vendor', 'Name': 'Cisco'}
因此，您可以看到它不仅仅是您指定的branch。
现在我们可以递归地遍历整个文件并获取所有这些元素。由于您没有指定所需的输出结构，我将把它放在字典中。
val_dict = dict()
for schild in root.iter('{http://www.icasi.org/CVRF/schema/prod/1.1}Branch'):
val = schild.attrib
val_dict[val.get('Type')] = val.get('Name')
>>{'Product Name': 'Cisco Unified Computing System (Management Software)',
'Product Version': '3.0',
'Service Pack': '(1)c',
'Vendor': 'Cisco'}
答案 1 :(得分：-1)
正如我指出的，只是在Cisco CVRF上使用XSL的一个片段：
<xsl:choose>
<xsl:when test="vuln:Remediations">
<xsl:for-each select="vuln:Remediations/vuln:Remediation">
<xsl:if test="vuln:ProductID">
<xsl:for-each select="vuln:ProductID">
<xsl:variable name="currPID" select="."/>
<xsl:value-of
select="//prod:FullProductName[@ProductID=$currPID]/."
/>
</xsl:for-each>
</xsl:if>
<xsl:if test="vuln:GroupID">
<xsl:for-each select="vuln:GroupID">
<xsl:variable name="currGID" select="."/>
<xsl:for-each
select="//prod:Groups[@GroupID=$currGID]/ProductID">
<xsl:value-of select="."/>
</xsl:for-each>
</xsl:for-each>
</xsl:if>
</xsl:for-each>
</xsl:when>
</xsl:choose>