Python db。Errno 9坏文件描述符

Question

长话短说，我试图从网站上读取HTML，并将表的值放在本地MySQL数据库中。我成功地使用BeautifulSoup4从表中删除了所有信息，但在将其放入MySQL db时遇到了困难。

我使用的是与Python2.7.5兼容的mysql.connector。这是我的代码：

import urllib2
from bs4 import BeautifulSoup
import mysql.connector
from mysql.connector import errorcode

# Opens MySQL db and handles all connection errors
dbConfig = {'user':'root',
            'password':'pimovi',
            'host':'127.0.0.1',
            'database':'RateYourMusic'}
try:
    db = mysql.connector.connect(**dbConfig)
    cursor = db.cursor()
except mysql.connector.Error as err:
    if err.errno == errorcode.ER_ACCESS_DENIED_ERROR:
        print "Something is wrong with your user name or password"
    elif err.errno == errorcode.ER_BAD_DB_ERROR:
        print "Database does not exist"
    else:
        print err
else:
    db.close()

url = 'http://rateyourmusic.com/customchart'
req = urllib2.Request(url, headers={'User-Agent':'Mozilla/5.0'})
read = urllib2.urlopen(req)
soup = BeautifulSoup(read)

table = soup.find('table', {'class':'mbgen'})

for row in table.findAll('tr'):
    try:
        cells = row.findAll('td')
        rank = int(cells[0].find(class_='ooookiig').text)
        artist = cells[2].find(class_='artist').text
        album = cells[2].find(class_='album').text
        year = cells[2].find(class_='mediumg').text
        year = int(year[1:5])

        entry = {'Rank':rank, 'Artist':artist, 'Album':album, 'Year':year}
        add_album = ("INSERT INTO chartinfo "
                     "(rank_info, artist_info, album_info, year_info) "
                     "VALUES (rank, artist, album, year)")
        cursor.execute(add_album)
        db.commit()
        print entry
    except AttributeError:
        pass

cursor.close()
db.close()

评论-ed的回溯

Traceback (most recent call last): 
File "C:\Programming\RateYourMusicCrawler\AlbumInfoCrawler.py", line 52, in <module> 
    cursor.execute(add_album) 
File "C:\Python27\lib\site-packages\mysql\connector\cursor.py", line 393, in execute
    self._handle_result(self._connection.cmd_query(stmt)) 
File "C:\Python27\lib\site-packages\mysql\connector\connection.py", line 586, in cmd_query 
    statement)) 
File "C:\Python27\lib\site-packages\mysql\connector\connection.py", line 386, in _send_cmd 
    packet_number) 
File "C:\Python27\lib\site-packages\mysql\connector\network.py", line 104, in send_plain
    raise errors.OperationalError(str(err)) 
mysql.connector.errors.OperationalError: [Errno 9] Bad file descriptor

Answer 1

这可能是因为：

else:
    db.close()

如果try块不导致任何异常，则关闭连接。试着把它拿出来。