'åªèŸåºcookieçkey-valueå­äž².
æ¯åŠ: HISTORY=21341; PHPSESSION=3289012u39jsdijf28; token=233129'

def header_output(self):

    result = []
    for key in self.keys():
        result.append(((key + '=') + self.get(key).value))
    return ';    '.join(result)
