+import string
+
+try:
+ from xml.etree.ElementTree import fixtag
+except ImportError:
+ def fixtag(tag, namespaces):
+ # given a decorated tag (of the form {uri}tag), return prefixed
+ # tag and namespace declaration, if any
+ if isinstance(tag, QName):
+ tag = tag.text
+ namespace_uri, tag = string.split(tag[1:], "}", 1)
+ prefix = namespaces.get(namespace_uri)
+ if prefix is None:
+ prefix = _namespace_map.get(namespace_uri)
+ if prefix is None:
+ prefix = "ns%d" % len(namespaces)
+ namespaces[namespace_uri] = prefix
+ if prefix == "xml":
+ xmlns = None
+ else:
+ xmlns = ("xmlns:%s" % prefix, namespace_uri)
+ else:
+ xmlns = None
+ return "%s:%s" % (prefix, tag), xmlns