python进行爬虫的处理（Html转DOM），使用bs4的BeautifulSoup这个类_网页爬虫结果 dom实例化

from urllib import request
from bs4 import BeautifulSoup
 
headers = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3894.0 Safari/537.36"
}
 
req = request.Request("https://blog.csdn.net/wtl1992",headers=headers)
 
connection = request.urlopen(req)
 
html = connection.read().decode("utf-8")
 
document = BeautifulSoup(html,features="lxml")
 
print(document.select_one("div.avatar-box.d-flex.justify-content-center.flex-column"))
print(document.select("div.avatar-box.d-flex.justify-content-center.flex-column"))
 

document.select : 选择器选择匹配的所有内容

document.select_one：选择器选择匹配的第一个