PythonValueError中的MySql

ValueError:索引47处的格式字符“”不受支持（0x22） args=（'unsupported format character\'“\'（0x22）位于索引47'，） 带_回溯=

当我尝试执行此代码时：

cursor.execute('SELECT * FROM library WHERE book_name LIKE "%'+bookname+'%" AND author LIKE "%'+author1+'%" AND written BETWEEN %s AND %s',(year1, year2))

当我只输入书名和/或作者时，就可以了。 当我只输入第1年和第2年时，也可以

但如果输入了（作者、书名）和（第1年、第2年）中的一个 它不起作用

该代码运行良好

cursor.execute('SELECT * FROM library WHERE book_name LIKE "%'+bookname+'%" AND author LIKE "%'+author1+'%"')

---

假设您需要curser.execute（）的字符串，如下所示

SELECT * FROM library WHERE book_name LIKE "%chuck%" AND author LIKE "%charmichel%" AND written BETWEEN 2015 AND 2017

然后你可以用

cursor.execute('SELECT * FROM library WHERE book_name LIKE "%'+bookname+'%" AND author LIKE "%'+author1+'%" AND written BETWEEN '+year1+ ' AND '+ year2)

或者如果你需要像

SELECT * FROM library WHERE book_name LIKE chuck AND author LIKE charmichel AND written BETWEEN 2015 AND 2017

然后你可以用

cursor.execute('SELECT * FROM library WHERE book_name LIKE '+bookname+' AND author LIKE '+author1+' AND written BETWEEN '+year1+ ' AND '+ year2)

execute（'SELECT*FROM library，其中图书名为“%”+bookname+'%”，作者名为“%”+author1+'%”，并编写了“+year1+”和“+year2”）-尝试了此操作。它没有像以前那样给出错误，但也没有给出任何结果(((