爬虫获取列表是空列表

Question

from urllib import requestimport reclass Spider():    url = 'https://www.huya.com/g/lol'    root_pattern = '<span class="txt">([\s\S]*?)</span>'    name_pattern = ' <i class="nick" title="">[\s\S]</i>'    number_pattern= '<span class="num">([\s\S])</span>'    def __fetch_content(self):        r = request.urlopen(Spider.url)        htmls = r.read()        htmls = str(htmls, encoding='utf-8')        return htmls    def __analysis(self,htmls):        root_html = re.findall(Spider.root_pattern,htmls)        anchors = []        for html in root_html:            name = re.findall(Spider.name_pattern,html)            number = re.findall(Spider.number_pattern,html)            anchor = {'name':name}            anchors.append(anchor)        return anchors    def __refine(self,anchors):        l= lambda anchor: {        'name':anchor['name'][0].strip(),        'number':anchor['number'][0]        }        return map(l,anchors)    def __soft(self,anchors):        anchors = sorted(anchors,key=self.__soft_seed,reverse=True)        return anchors    def __soft_seed(self,anchor):        r = re.findall('\d',anchor['number'])        number = float(r[0])        if '万' in anchor['number']:            number *=10000        return number    def __show(self,anchors):        for rank in range(0,len(anchors)):            print('rank'+str(rank+1))            +'  :  '+anchors[rank]['name']            +'     '+anchors[rank]['number']    def go(self):        htmls = self.__fetch_content()        anchors=self.__analysis(htmls)        anchors =list(self.__refine(anchors))        anchors = self.__soft(anchors)        self.__show(anchors)spider = Spider()spider.go()

Answer 1

无非两个方面的错误：

1. 没有抓取到目标页面

2. 正则错误，不能匹配到目标内容