python - urlopen 和 mysql 的问题

Question

我想获取网页的纯文本，其中存储了 url，然后在同一个表中添加文本进行更新。出于某种原因，在打开大约 800 个链接后，程序结束了。以下是部分代码：

db=_mysql.connect("localhost",user="",passwd="",db="noticias")
db.query("""select id,url from news where id>17821""")
results = db.store_result()
numrows = results.num_rows()

for i in range(0,numrows):
 row = results.fetch_row()
 link = row[0][1] # URL to open
  while True:
   try:
    SourceCode = urlopen(link) 
    break
    except:

    .........
SourceCode.read()
    SourceCode.close()
.........

 title = str(title)
 plaintext = str(plaintext)
 query = "UPDATE news SET title = '"+title+"',plaintext ='"+plaintext+"' WHERE id ="+row[0][0]
 try:
  db.query(query)
  break
 except:

db.close()