'Private method to check section and option types'

def _check_section_option(self, section, option):

    if (section is None):
        section = self.DEFAULT_SECTION_NAME
    elif (not is_text_string(section)):
        raise RuntimeError("Argument    'section'    must    be    a    string")
    if (not is_text_string(option)):
        raise RuntimeError("Argument    'option'    must    be    a    string")
    return section
