def get_namespace(self, uri):
        key = (self, uri)
        if key in self.context.namespaces:
            return self.context.namespaces[key]
        else:
            ns = TemplateNamespace(uri, self.context._copy(),
                                templateuri=uri,
                                calling_uri=self._templateuri)
            self.context.namespaces[key] = ns
            return ns
Return a :class:`.Namespace` corresponding to the given ``uri``.
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/Mako-0.8.1/mako/runtime.py/Namespace.get_namespace