python2.7 插入列表时的 MySQLdb 语法错误

Question

我正在尝试将抓取的数据插入MySQL数据库.....到目前为止，我从互联网上找到了我需要的所有代码，但可以理解其中的大部分......这是我的代码：

import MySQLdb
from bs4 import BeautifulSoup
import requests
r  = requests.get("http://www.metalinjection.net/")
data = r.text
soup = BeautifulSoup(data, "lxml")
news = soup.find_all("article", {"class": "post"}) 
titles = []
for tits in news:
titles.append(tits.contents[3].find_all("h2", {"class": "title"})
[0].text)
print titles
images = []
for image_link in news:
images.append(image_link.img['src'])
print images    
for link in news: 
l1 = link.a['href']
db = MySQLdb.connect(host="localhost",
user="admin",
passwd="admin",
db="lot_data")
t2 =d2 =i2 = "die"
dbc = db.cursor()
db.set_character_set('utf8')
dbc.execute('SET NAMES utf8;')
dbc.execute('SET CHARACTER SET utf8;')
dbc.execute('SET character_set_connection=utf8;')
sql = "insert into lot_data VALUES('%s', '%s', '%s')" % 
(titles, images , "nothing") 
rows = dbc.execute(sql)
db.commit()
db.close()

当我运行脚本时，它给出了以下错误：

Traceback (most recent call last):
File "C:/Python27/ques.py", line 32, in <module>
rows = dbc.execute(sql)
File "C:Python27libsite-packagesMySQLdbcursors.py", line 205, in execute
self.errorhandler(self, exc, value)
File "C:Python27libsite-packagesMySQLdbconnections.py", line 36, in defaulterrorhandler
raise errorclass, errorvalue
ProgrammingError: (1064, 'You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'The Monday Grind: MELLOW HARSHER Served Cold', u"METALLICA's Former Producer Apo' at line 1')

当我用字符串替换标题或图像时，它们会入而不会出错.....另外，如果有更好，有条理的插入方式，请指出我....

Answer 1

titles和images是列表。不能以这种方式直接插入列表。insert一次创建一行。 您需要循环访问列表并在每次迭代中插入一行。

如果两个列表是对应的(相同的长度，同一索引上的元素属于一起(，你可以重写程序的下半部分，插入到数据库中，如下所示：

sql = "insert into lot_data VALUES(%s, %s, %s)"
for (title, imagelink) in zip(titles, images):
data = (title, imagelink, "nothing")
dbc.execute(sql, data)

此代码循环访问这两个列表，并逐个插入元素。

编辑：优化 sql 语句。用我上面的代码替换dbc.ececute(...和db.commit()之间的现有代码。