python3----requests

 import requests

 def get_html_text(url):
     try:
         r = requests.get(url, timeout=30)
         r.raise_for_status()   # 如果状态不是200,引发HTTPError 异常
         r.encoding = r.apparent_encoding
         return r.text
     except:
         return "产生异常"

 if __name__ == "__main__":
     url = "http://www.baidu.com"
     print(get_html_text(url))

http://blog.csdn.net/linzch3/article/details/60750355