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[compat] add compat_etree_register_namespace
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@ -2529,6 +2529,24 @@ def compat_etree_fromstring(text):
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el.text = el.text.decode('utf-8')
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return doc
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if hasattr(etree, 'register_namespace'):
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compat_etree_register_namespace = etree.register_namespace
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else:
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def compat_etree_register_namespace(prefix, uri):
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"""Register a namespace prefix.
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The registry is global, and any existing mapping for either the
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given prefix or the namespace URI will be removed.
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*prefix* is the namespace prefix, *uri* is a namespace uri. Tags and
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attributes in this namespace will be serialized with prefix if possible.
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ValueError is raised if prefix is reserved or is invalid.
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"""
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if re.match(r"ns\d+$", prefix):
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raise ValueError("Prefix format reserved for internal use")
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for k, v in list(etree._namespace_map.items()):
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if k == uri or v == prefix:
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del etree._namespace_map[k]
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etree._namespace_map[uri] = prefix
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if sys.version_info < (2, 7):
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# Here comes the crazy part: In 2.6, if the xpath is a unicode,
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# .//node does not match if a node is a direct child of . !
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