网络爬虫通用代码框架

import requests

def getHTMLText(url):
    try:
        kv = {'user-agent':'Mozilla/5.0'}
        r = requests.get(url,headers=kv,timeout = 30)
        r.raise_for_status()
        r.encoding = r.apparent_encoding
        return r.text
    except:
        return "产生异常"

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