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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def namespace(self):
 """ Get the element's namespace. @return: The element's namespace by resolving the prefix, the explicit namespace or the inherited namespace. @rtype: (I{prefix}, I{name}) """

        if self.prefix is None:
            return self.defaultNamespace()
        return self.resolvePrefix(self.prefix)