RT，官方文檔看的不是很懂：RequestHandler.send_error(status_code=500,kwargs)**SendsthegivenHTTPerrorcodetothebrowser.Ifflush()hasalreadybeencalled,itisnotpossibletosendanerror,sothismethodwillsimplyterminatetheresponse.Ifoutputhasbeenwrittenbutnotyetflushed,itwillbediscardedandreplacedwiththeerrorpage.Overridewrite_error()tocustomizetheerrorpagethatisreturned.Additionalkeywordargumentsarepassedthroughtowrite_error.RequestHandler.write_error(status_code,kwargs)**Overridetoimplementcustomerrorpages.write_errormaycallwrite,render,set_header,etctoproduceoutputasusual.Ifthiserrorwascausedbyanuncaughtexception(includingHTTPError),anexc_infotriplewillbeavailableaskwargs["exc_info"].Notethatthisexceptionmaynotbethe“current”exceptionforpurposesofmethodslikesys.exc_info()ortraceback.format_exc.我理解的是send_error調(diào)用了write_error，所以寫自定義錯(cuò)誤頁面的時(shí)候要自己實(shí)現(xiàn)write_error方法，拋出錯(cuò)誤的時(shí)候使用send_error。那么又該在什么時(shí)候使用rasietornado.web.HTTPError呢？