Question

我正在尝试使用python中的xml.etree创建shibboleth配置文件，并且在输出完成的文档时我忽略了命名空间分配的问题。我很确定这是Outputting an “unused” XML namespace using ElementTree

中描述的问题

我宣布他们......

namespaces = {
    'resolver': 'urn:mace:shibboleth:2.0:resolver',
    'xsi': 'http://www.w3.org/2001/XMLSchema-instance',
    'pc': 'urn:mace:shibboleth:2.0:resolver:pc',
    'ad': 'urn:mace:shibboleth:2.0:resolver:ad',
    'dc': 'urn:mace:shibboleth:2.0:resolver:dc',
    'enc': 'urn:mace:shibboleth:2.0:attribute:encoder',
    'sec': 'urn:mace:shibboleth:2.0:security',
}

for prefix, uri in namespaces.iteritems():
    ET.register_namespace(prefix, uri)

如果我打印出为文档定义的名称空间......

print json.dumps( ET._namespace_map, indent=True )

我在那里看到我的命名空间..

{
 "urn:mace:shibboleth:2.0:resolver:pc": "pc", 
 "http://schemas.xmlsoap.org/wsdl/": "wsdl", 
 "urn:mace:shibboleth:2.0:resolver:ad": "ad", 
 "urn:mace:shibboleth:2.0:resolver": "resolver", 
 "http://www.w3.org/1999/xhtml": "html", 
 "http://www.w3.org/1999/02/22-rdf-syntax-ns#": "rdf", 
 "urn:mace:shibboleth:2.0:security": "sec", 
 "urn:mace:shibboleth:2.0:attribute:encoder": "enc", 
 "http://www.w3.org/2001/XMLSchema": "xs", 
 "http://www.w3.org/2001/XMLSchema-instance": "xsi", 
 "http://www.w3.org/XML/1998/namespace": "xml", 
 "urn:mace:shibboleth:2.0:resolver:dc": "dc"
}

当我将文档写入文件或将其转储到stdout时，它会省略“enc”和“pc”命名空间。与其他问题一样，“enc”和“pc”不用于限定元素，但用于限定属性值。我可以通过手动将它们添加到文档来强制它们出现......

root.set("xmlns:enc", "urn:mace:shibboleth:2.0:attribute:encoder")
root.set("xmlns:pc", "urn:mace:shibboleth:2.0:resolver:pc")

感觉我不应该来做到这一点。有没有办法在输出文档时强制xml.etree输出所有已定义的命名空间？

利安

强制xml.etree输出“unused”命名空间

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