1. 测试HTML代码
# 测试代码test.html<html><head><meta charset="UTF-8"></head><body><div class='main-content'><h1 id="title">This is a test!</h1><p class="main-content ref">This is paragraph1</p><div><p>测试语句1</p></div></div><div><p>This is paragraph2</p><div><p class="ref">测试语句2</p></div></div></body></html>
2. etree.HTML( )
调用HTML类对HTML文本进行初始化，成功构造XPath解析对象，同时可以自动修正HMTL文本（标签缺少闭合自动添加上）
from lxml import etree#首先导入lxml库的etree模块with open('test.html','r') as f:c = f.read()#调用HTML类进行初始化，成功构造XPath解析对象tree = etree.HTML(c)
3. etree.tostring()
tostring( )方法可以输出修正之后的HTML代码，也可以直接读取文本进行解析，但是结果为bytes类型，因此需要利用decode()方法将其转成str类型
具体的decode( )格式需要浏览器审查网页查看
import requestsfrom lxml import etreewith open('real_case.html', 'r', encoding='utf-8') as f:c = f.read()tree = etree.HTML(c)table_element = tree.xpath("//div[@class='table-box'][1]/table/tbody/tr")for row in table_element:try:td1 = row.xpath('td')[0]#具体的转成什么格式，需要审查网页元素，查看s1 = etree.tostring(td1).decode('utf-8')print(s1)except Exception as error:pass
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