MySQLdb占位符实现不起作用

Python的MySQLdb模块应该使用SQL语句字符串中的格式说明符来实现占位符。我下面从MySQL食谱MySQLdb占位符实现不起作用

import sys 
import MySQLdb 
import Cookbook 

try: 
    conn = Cookbook.connect() 
    print("Connected") 
except MySQLdb.Error as e: 
    print("Cannot connect to server") 
    print("Error code:", e.args[0]) 
    print("Error message:", e.args[1]) 
    sys.exit (1) 

cursor = conn.cursor() 
cursor.execute (""" 
       INSERT INTO profile (name,birth,color,foods,cats) 
       VALUES(%s,%s,%s,%s,%s) 
       """,("Josef", "1971-01-01", None, "eggroll", 4))

个例但是，当我从壳

mysql> SELECT * FROM profile WHERE name LIKE 'J%'; 
+----+--------+------------+-------+----------------+------+ 
| id | name | birth  | color | foods   | cats | 
+----+--------+------------+-------+----------------+------+ 
| 7 | Joanna | 1952-08-20 | green | lutefisk,fadge | 0 | 
+----+--------+------------+-------+----------------+------+

检查很明显，没有什么是inserted.Why？如果我添加cursor.commit建议

cursor.commit() 
AttributeError: 'Cursor' object has no attribute 'commit'

来源

2017-07-27 MishaVacic

检查编辑的答案。将光标更改为conn – Aniket

您没有提交事务。

最后在执行查询后添加conn.commit()。

cursor = conn.cursor() 
cursor.execute (""" 
      INSERT INTO profile (name,birth,color,foods,cats) 
      VALUES(%s,%s,%s,%s,%s) 
      """,("Josef", "1971-01-01", None, "eggroll", 4)) 
conn.commit()

来源

2017-07-27 10:37:47 Aniket

谢谢，现在按预期工作。 – MishaVacic

很高兴帮助。 – Aniket

MySQLdb占位符实现不起作用

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