xpath之string(.)方法

from lxml import  etreehtml = '''    
需要的内容1       需要的内容2    
'''selector =  etree.HTML(html )contents  =  selector.xpath ( '//li[@class = "tag_1"]')contents1  =  selector.xpath ( '//li[@class = "tag_1"]')[0]contents2  =  contents1.xpath('string(.)')contents3  =  selector.xpath ( '//li[@class = "tag_1"]/text()')print(contents)  #[]print(contents1) # print(contents2)print(contents3)

输出

D:\Python\venv\Scripts\python.exe D:/Python/venv/test9.py[]需要的内容1      需要的内容2['需要的内容1\n         ', '\n          ']Process finished with exit code 0

string(.)可以用于提取标签嵌套标签的内容。