python 提取出所有学生的序号，姓名，成绩(简单易懂，代码可以直接运行)(正则表达式提取)
数据如下：
<tbody><tr><td><span><span class="c-index c-index-hot1 c-gap-icon-right-small">1</span>张婷婷</span></td><td class="opr-toplist-right">92<i class="opr-toplist-st c-icon c-icon-down"></i></td></tr><tr><td><span><span class="c-index c-index-hot1 c-gap-icon-right-small">2</span>王华</span></td><td class="opr-toplist-right">91<i class="opr-toplist-st c-icon c-icon-down"></i></td></tr><tr><td><span><span class="c-index c-index-hot1 c-gap-icon-right-small">3</span>张岚</span></td><td class="opr-toplist-right">90<i class="opr-toplist-st c-icon c-icon-down"></i></td></tr><tr><td><span><span class="c-index c-gap-icon-right-small">4</span>孙鸿峰</span></td><td class="opr-toplist-right">90<i class="opr-toplist-st c-icon c-icon-down"></i></td></tr><tr><td><span><span class="c-index c-gap-icon-right-small">5</span>周海栋</span></td><td class="opr-toplist-right">89<i class="opr-toplist-st c-icon c-icon-down"></i></td></tr><tr><td><span><span class="c-index c-gap-icon-right-small">6</span>武静</span></td><td class="opr-toplist-right">88<i class="opr-toplist-st c-icon c-icon-down"></i></td></tr></tbody>
我一共是用来两种方法解开了这个题，一个将数据存入了字典，一个将数据存入了元组中，第一种方法麻烦一点，但是可以用于正则表达式爬取网络中的信息，点个👍吧，代码如下：
import reimport requests#提取所有学生的序号，姓名，成绩str='''<tbody><tr><td><span><span class="c-index c-index-hot1 c-gap-icon-right-small">1</span>张婷婷</span></td><td class="opr-toplist-right">92<i class="opr-toplist-st c-icon c-icon-down"></i></td></tr><tr><td><span><span class="c-index c-index-hot1 c-gap-icon-right-small">2</span>王华</span></td><td class="opr-toplist-right">91<i class="opr-toplist-st c-icon c-icon-down"></i></td></tr><tr><td><span><span class="c-index c-index-hot1 c-gap-icon-right-small">3</span>张岚</span></td><td class="opr-toplist-right">90<i class="opr-toplist-st c-icon c-icon-down"></i></td></tr><tr><td><span><span class="c-index c-gap-icon-right-small">4</span>孙鸿峰</span></td><td class="opr-toplist-right">90<i class="opr-toplist-st c-icon c-icon-down"></i></td></tr><tr><td><span><span class="c-index c-gap-icon-right-small">5</span>周海栋</span></td><td class="opr-toplist-right">89<i class="opr-toplist-st c-icon c-icon-down"></i></td></tr><tr><td><span><span class="c-index c-gap-icon-right-small">6</span>武静</span></td><td class="opr-toplist-right">88<i class="opr-toplist-st c-icon c-icon-down"></i></td></tr></tbody>'''#爬取数据利用则这表达式，一步一步缩小范围#首先建立一个大列表用来存储小字典的信息student = []tr_list = re.findall(r'<tr>(.*?)</tr>',str,re.S)#先将每一个tr一次提出来#print(tr_list)n = 0for tr in tr_list:#num = re.search(r'c-gap-icon-right-small">(.*)?</span>',tr,re.S).group(1),出错会多提取一些元素1</span>张婷婷num = re.search(r'c-gap-icon-right-small">(\d)?</span>',tr,re.S).group(1)name = re.search(r'</span>(.*?)</span>', tr, re.S).group(1)grade = re.search(r'<td class="opr-toplist-right">(.*?)<i class="opr-toplist-st c-icon c-icon-down">', tr, re.S).group(1)n = n+1#建立字典存储信息item = {}#建立一个空字典item['num'] = numitem['name'] = nameitem['grade'] = gradeprint(item.values())student.append(item)# num = re.search(r'<span class="c-index c-index-hot1 c-gap-icon-right-small">(.*?)</span>', tr, re.S)# print(n)print(student)#方法二：正则表达式slt = re.findall(r'c-gap-icon-right-small">(\d+)</span>(\w+)</span></td><td class="opr-toplist-right">(\d+)<i class="opr-toplist-st c-icon c-icon-down">',str,re.S)print(slt)
点个👍吧
