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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 page_str(self):
 """ The RestructuredText documentation page for the enumeration. This is the only API member for the class. """

        tmpl = '.. _%s:\n\n%s\n\n%s\n\n----\n\n%s'
        components = (
            self._ms_name, self._page_title, self._intro_text,
            self._member_defs
        )
        return tmpl % components