gh-57587: Add the namespaces parameter to the ElementTree serializer - #157523
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serhiy-storchaka wants to merge 3 commits into
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…r_namespace() ValueError is now raised for an invalid prefix, for the reserved xmlns prefix, and for the xml prefix bound to other namespace or other prefix bound to the XML namespace, as the documentation always promised. Only the reserved nsN prefixes were rejected before.
…lizer tostring(), tostringlist() and ElementTree.write() accept a mapping from namespace prefixes to URIs which chooses the prefixes for this serialization, instead of the global registry of register_namespace(). Only the namespaces used in the tree are declared; the empty prefix sets the default namespace; a registered prefix which the mapping reserves for another namespace is not used.
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tostring(),tostringlist()andElementTree.write()accept a mapping from namespace prefixes to URIs which chooses the prefixes for this serialization, instead of the global registry ofregister_namespace(). Only the namespaces used in the tree are declared; the empty prefix sets the default namespace; a registered prefix which the mapping reserves for another namespace is not used.Based on #157521, which adds the validation of prefixes.