在python中声明varchar

Question

如何在python中声明sql中的变量?

我已经试了这么久:

import re
import sqlite3
conn = sqlite3.connect('imdb1.db')
c = conn.cursor()
c.execute('''CREATE TABLE imdb1 (ROWID int, Title varchar(40), Rating int)''')
x = open("ratings.list.txt","r")
movread = x.readlines()
x.close()

#s = raw_input('Search: ').lower()
for ns in movread:

    if 'the lord of the' in ns.lower():
        d = re.split('s+',ns,4)
        Title = d[4].rstrip()
        Rating= d[3]
        list = [Title,Rating]
        print list
        # Insert a row of data
        c.execute('INSERT INTO imdb1 ( Title, Rating) values ("%s","%s")'%(list[0],list[1]))
        conn.commit()

输出:

    ---------------------------------------------------------------------------
OperationalError                          Traceback (most recent call last)
<ipython-input-90-0d9cfec4960a> in <module>()
     25         print list
     26         # Insert a row of data
---> 27         c.execute('INSERT INTO imdb1 ( Title, Rating) values ("%s","%s")'%(list[0],list[1]))
     28         conn.commit()
     29 
OperationalError: near "5": syntax error
['The Lord of the Rings: The Return of the King (2003)', '8.9']
['The Lord of the Rings: The Fellowship of the Ring (2001)', '8.8']
['The Lord of the Rings: The Two Towers (2002)', '8.7']
['"5 Second Movies" (2007) {The Lord of the Rings and the Two Towers (#1.63)}', '6.2']

所以它看起来像当我到达底部的"5 "，我不能把列表放入我的sqldb我怎么能做到呢?我试图声明变量类型，但它没有工作!

Answer 1

问题是您所替换的字符串有引号。与其使用python的字符串格式，不如使用sqlite的:

c.execute('INSERT INTO imdb1 ( Title, Rating) values (?, ?)', (list[0],list[1]))

注意，这是在为数据库格式化字符串时应该遵守的一般原则。使用恶意格式化的电影标题，用户可能会破坏数据库¹(称为SQL注入)。

^{1我不确定他们在这里会造成多大的损害，因为sqlite的execute只执行一条语句，但我确信其他比我更有经验的人可能会编造一些相当讨厌的东西。}