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python - 如何删除与python中的tagName和属性匹配的所有XML标签

问题描述

我有一个大的扁平 xsd 文件，其中每个标签前面都有“xs:Something”。我已经在我的扁平化 XML 中编译了一个未使用类型的列表，我想要一种自动化的方法来删除开始、结束标记以及介于两者之间的所有内容。

示例 XSD：

<!--W3C XML Schema generated by XMLSpy v2019 rel. 3 sp1 (x64) (http://www.altova.com)-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns="http://www.opentravel.org/OTA/2003/05" targetNamespace="http://www.opentravel.org/OTA/2003/05" elementFormDefault="qualified">
    <xs:annotation>
        <xs:documentation xml:lang="en">All Schema files in the OpenTravel Alliance specification are made available according to the terms defined by the OpenTravel License Agreement at http://www.opentravel.org/Specifications/Default.aspx.</xs:documentation>
    </xs:annotation>
    <xs:simpleType name="AvailabilityStatusType">
        <xs:annotation>
            <xs:documentation xml:lang="en">Identifies the availability status of an item.</xs:documentation>
        </xs:annotation>
        <xs:restriction base="xs:NMTOKENS">
            <xs:enumeration value="Open">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory is available for sale.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="Close">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory is not available for sale.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="ClosedOnArrival">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory is not available for sale to arriving guests.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="ClosedOnArrivalOnRequest">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory may not be available for sale to arriving guests.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="OnRequest">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory may be available.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="RemoveCloseOnly">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Remove Close restriction while keeping other restrictions in place.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
        </xs:restriction>
    </xs:simpleType>
    <xs:simpleType name="RatePlanEnum">
        <xs:annotation>
            <xs:documentation xml:lang="en">Identifies rate plan types.</xs:documentation>
        </xs:annotation>
        <xs:restriction base="xs:NMTOKENS">
            <xs:enumeration value="Government">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory is available for sale.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="Negotiated">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory is not available for sale.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="Preferred">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory is not available for sale to arriving guests.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="Other_">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory may not be available for sale to arriving guests.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
        </xs:restriction>
    </xs:simpleType>

假设我未使用的类型列表如下：myTypes = [RatePlanEnum]

这意味着我想删除整个 simpleType name=RatePlanEnum 节点。

我试过：

from lxml import etree 
doc = etree.parse('myfile.xml') 
for elem in doc.findall('.//xs:simpleType'): 
    parent = elem.getparent() 
    if(elem.attrib.get('name') = 'RatePlanEnum'): 
        parent.remove(elem)

我如何以编程方式执行此操作并在所有修改后吐出 xml？

标签： pythonxmlxsdlxmlelementtree

解决方案

此文件使用命名空间xmlns:xs="http://www.w3.org/2001/XMLSchema"，您必须使用{http://www.w3.org/2001/XMLSchema}而不是xs:infindall()

 doc.findall('.//{http://www.w3.org/2001/XMLSchema}simpleType'):

文档：lxml - 命名空间

完整示例：

from lxml import etree 

data = '''<!--W3C XML Schema generated by XMLSpy v2019 rel. 3 sp1 (x64) (http://www.altova.com)-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns="http://www.opentravel.org/OTA/2003/05" targetNamespace="http://www.opentravel.org/OTA/2003/05" elementFormDefault="qualified">
    <xs:annotation>
        <xs:documentation xml:lang="en">All Schema files in the OpenTravel Alliance specification are made available according to the terms defined by the OpenTravel License Agreement at http://www.opentravel.org/Specifications/Default.aspx.</xs:documentation>
    </xs:annotation>
    <xs:simpleType name="AvailabilityStatusType">
        <xs:annotation>
            <xs:documentation xml:lang="en">Identifies the availability status of an item.</xs:documentation>
        </xs:annotation>
        <xs:restriction base="xs:NMTOKENS">
            <xs:enumeration value="Open">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory is available for sale.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="Close">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory is not available for sale.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="ClosedOnArrival">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory is not available for sale to arriving guests.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="ClosedOnArrivalOnRequest">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory may not be available for sale to arriving guests.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="OnRequest">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory may be available.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="RemoveCloseOnly">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Remove Close restriction while keeping other restrictions in place.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
        </xs:restriction>
    </xs:simpleType>
    <xs:simpleType name="RatePlanEnum">
        <xs:annotation>
            <xs:documentation xml:lang="en">Identifies rate plan types.</xs:documentation>
        </xs:annotation>
        <xs:restriction base="xs:NMTOKENS">
            <xs:enumeration value="Government">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory is available for sale.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="Negotiated">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory is not available for sale.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="Preferred">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory is not available for sale to arriving guests.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="Other_">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Inventory may not be available for sale to arriving guests.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
        </xs:restriction>
    </xs:simpleType>
</xs:schema>'''

doc = etree.fromstring(data)

for elem in doc.findall('.//{http://www.w3.org/2001/XMLSchema}simpleType'):
    parent = elem.getparent()
    if elem.attrib.get('name') == 'RatePlanEnum':
        parent.remove(elem)

print(etree.tostring(doc).decode())

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