XML 和 Python：获取根元素中声明的命名空间

如何访问多个xmlnsXML 树根元素的声明？例如：

import xml.etree.cElementTree as ET
data = """<root
             xmlns:one="http://www.first.uri/here/"
             xmlns:two="http://www.second.uri/here/">

          ...all other child elements here...
          </root>"""

tree = ET.fromstring(data)
# I don't know what to do here afterwards

我想要一本与此类似的字典，或者至少是某种格式，以便更容易获取 URI 和匹配的标签

{'one':"http://www.first.uri/here/", 'two':"http://www.second.uri/here/"}

我不知道如何做到这一点xml.etree，但与lxml.etree http://codespeak.net/lxml/你可以这样做：

import lxml.etree as le
data = """<root
             xmlns:one="http://www.first.uri/here/"
             xmlns:two="http://www.second.uri/here/">

          ...all other child elements here...
          </root>"""

tree = le.XML(data)
print(tree.nsmap)
# {'two': 'http://www.second.uri/here/', 'one': 'http://www.first.uri/here/'}