在使用xpath,遇到了报错，记录下。
（python中代码是没有问题）
from lxml import etree
import requests
from constants import headers
def run():
# url = "http://www.gushiju.net/shici/guanyu/%E4%B8%89%E5%9B%BD%E6%BC%94%E4%B9%89"
# page_text = requests.get(url=url, headers=headers).text
tree = etree.parse("2.html")
res = tree.xpath('/html/head/title')
print(res)
if __name__ == '__main__':
run()
发现，其实是html文档有问题。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>hello world</h1>
</body>
</html>
正确的解决方式是：
<meta charset="UTF-8" /> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" />
// 在每一个标签末尾加上“/”号
执行成功了！
标签：__,head,lxml,etree,url,html,line From： https://www.cnblogs.com/shaoyishi/p/16971974.html