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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 get_template_namespace(self) -> Dict[str, Any]: """Returns a dictionary to be used as the default template namespace. May be overridden by subclasses to add or modify values. The results of this method will be combined with additional defaults in the `tornado.template` module and keyword arguments to `render` or `render_string`. """

        namespace = dict(
            handler=self,
            request=self.request,
            current_user=self.current_user,
            locale=self.locale,
            _=self.locale.translate,
            pgettext=self.locale.pgettext,
            static_url=self.static_url,
            xsrf_form_html=self.xsrf_form_html,
            reverse_url=self.reverse_url,
        )
        namespace.update(self.ui)
        return namespace