import requests
url=""
try
    kv = {'user-agent':  'Mozilla/5.0'}
    r = requests.get(url,headers=kv)
    r.raise_for_status()
    r.encoding = r.apparent_encoding
    print(r.text[1000:2000])
except:
    print("false")

'Mozilla/5.0'是通用浏览器标识