python之获取页面标签的方法

from urllib.request import urlopen
from urllib.error import HTTPError
from bs4 import BeautifulSoup

def getTitle(url):
try:
html = urlopen(url)
except HTTPError as e:
return None
try:
bs0bj = BeautifulSoup(html.read(), "html.parser")
title = bs0bj.head.title
except AttributeError as e:
return None
return title

title = getTitle("http://www.baidu.com")
if title == None:
print("Title could not be found !")
else:
print(title)