Python 新浪实时新闻

'''
Python 新浪实时新闻 by 郑瑞国
'''
import re,time
import urllib.request 
 
def open_url(url):
    return urllib.request.urlopen(url).read().decode("utf-8","ignore")
 
def find_text(url):
    return re.findall('<a.*>(.*?)</a>',open_url(url))
 
def save_text(text):
    t=[]
    try:
        with open(r'd:\test.txt','r') as pre_f:
            t = pre_f.readlines()
    except:
        pass
    with open(r'd:\test.txt','a') as f:
        for i in range(0,len(text)):
            if len(text[i])>8:
                if text[i]+'\n' not in t: 
                    print(text[i])
                    f.write(text[i]+"\n")
    print('*',end=' ')
 
if __name__ == "__main__":
    url = 'http://news.sina.com.cn'
    while True:
        text = find_text(url)
        save_text(text)
        time.sleep(20)