python 爬虫 requests.get() 所有网页都打不开

python 爬虫 requests.get() 所有网页都打不开
用代码块功能插入代码，请勿粘贴截图
from urllib import request
from bs4 import BeautifulSoup
import requests
import re
from fake_useragent import UserAgent
req_header= {'User-Agent':str(UserAgent().random)}
def getHTMLText(url):
    try:
        r = requests.get(url,timeout=30,headers = req_header)
        r.raise_for_status()  #如果不是200，产生异常requests.HTTPError
        r.encoding = r.apparent_encoding
        return r.text
    except:
        return "产生异常"

url_zhangjie = 'www.qq.com'
url_neirong = getHTMLText(url_zhangjie)
print(url_neirong)
运行结果及报错内容

产生异常

http协议都没加

img