I second request for tag names not prefixed with a root namespace in python,
mostly because of ugly code, as performance degradation is negligible on relatively small files. But this ubiquitous repeating (even in the case if you're appending a variable to every tag name) is just against the DRY principle, and I don't like it.
I think an extra option to pass list of namespaces that should NOT be prepended to the tag names would be sufficient.