ValueError: could not convert string to float: 数值错误

Question

import re

from urllib import request
#断点调试 必须要会
class Spider():
    url = 'https://www.panda.tv/cate/lol'
    root_pattern = '<div class="video-info">([\s\S]*?)</div>'
    name_pattern = '</i>([\s\S]*?)</span>'
    number_pattern = '<span class="video-number">([\s\S]*?)</span>'


    def __fetch_content(self): #私有函数 私有方法
        r = request.urlopen(Spider.url)
        # bytes
        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, 'number':number}
            anchors.append(anchor)

        return anchors

    def __refine(self, anchors): #数据精炼
        l = lambda anchor:{
            'name':anchor['name'][0].strip(),
            'number':anchor['number'][0]
            }
        return map (l, anchors)
    def __sort(self,anchors): #排序函数
        #filter
        anchors = sorted(anchors, key=self.__sort_seed,reverse=True)
        return anchors
    
    def __sort_seed(self, anchor):
        r = re.findall('\d*', anchor['number'])
        number = int(r[0])
        if '万' in anchor['number']:
            number *= 10000
        return number

    def __show(self, anchors):
        for anchor in anchors:
            print(anchor['name'] + '------' + anchor['number'])


    def go(self):
        htmls = self.__fetch_content()
        anchors = self.__analysis(htmls)
        anchors = list(self.__refine(anchors))
        anchors = self.__sort(anchors)
        self.__show(anchors)
        

spider = Spider()
spider.go()
#选区标签要选择具有唯一性得
#启动段点调试是F5 启动一行调试是F10 从一个段点到下一个段点

七月老师可能是熊猫tv得网站已经改变不满足现有要求 输出来之后提示
ValueError: could not convert string to float: 求老师帮我改正

Answer 1

7七月 2019-03-27 05:02:50

熊猫TV 好像没什么人了。你换斗鱼吧，找斗鱼里对应的页面。但是可能正则要改一下。用我们之前学习的正则试着解析一下。