import urllib.request
from bs4 import BeautifulSoup
while True:
web_road=input("输入网络的网址:")
response=urllib.request.urlopen(str(web_road))
html=response.read()
soup=BeautifulSoup(html,features="html.parser")
print("以下是处理后的源码")
print(soup)
response=urllib.request.urlopen(str(web_road))
总是说:ValueError: unknown url type: 'www.baidu.com'
这是什么意思?如何解决,求大神帮忙!感谢!