為什么把下劃線改成了橫線 User-Agent還是settings里面設(shè)置的默認(rèn)的 并沒有隨機改變?。?/h1>

'USER_AGENT': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36'}

三個相關(guān)部分的代碼 哪里有錯嗎

class?my_useragent(object):
????def?process_request(self,?request,?spider):
????????USER_AGENT_LIST?=?[
????????????'MSIE?(MSIE?6.0;?X11;?Linux;?i686)?Opera?7.23',
????????????'Opera/9.20?(Macintosh;?Intel?Mac?OS?X;?U;?en)',
????????????'Opera/9.0?(Macintosh;?PPC?Mac?OS?X;?U;?en)',
????????????'iTunes/9.0.3?(Macintosh;?U;?Intel?Mac?OS?X?10_6_2;?en-ca)',
????????????'Mozilla/4.76?[en_jp]?(X11;?U;?SunOS?5.8?sun4u)',
????????????'iTunes/4.2?(Macintosh;?U;?PPC?Mac?OS?X?10.2)',
????????????'Mozilla/5.0?(Macintosh;?Intel?Mac?OS?X?10.6;?rv:5.0)?Gecko/20100101?Firefox/5.0',
????????????'Mozilla/5.0?(Macintosh;?Intel?Mac?OS?X?10.6;?rv:9.0)?Gecko/20100101?Firefox/9.0',
????????????'Mozilla/5.0?(Macintosh;?Intel?Mac?OS?X?10.8;?rv:16.0)?Gecko/20120813?Firefox/16.0',
????????????'Mozilla/4.77?[en]?(X11;?I;?IRIX;64?6.5?IP30)',
????????????'Mozilla/4.8?[en]?(X11;?U;?SunOS;?5.7?sun4u)'
????????]
????????agent?=?random.choice(USER_AGENT_LIST)
????????request.headers['User-Agent']?=?agent

USER_AGENT?=?'Mozilla/5.0?(Windows?NT?10.0;?Win64;?x64)?AppleWebKit/537.36?(KHTML,?like?Gecko)?Chrome/73.0.3683.103\
?Safari/537.36'

DOWNLOADER_MIDDLEWARES?=?{
????#'douban.middlewares.DoubanDownloaderMiddleware':?543,
????'douban.middlewares.my_useragent':?542,
}