<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def register_prefix(self, nspair):
 """ Register with ElementTree a set of namespaces :param nspair: A dictionary of prefixes and uris to use when constructing the text representation. :return: """

        for prefix, uri in nspair.items():
            try:
                ElementTree.register_namespace(prefix, uri)
            except AttributeError:
                # Backwards compatibility with ET < 1.3
                ElementTree._namespace_map[uri] = prefix
            except ValueError:
                pass