mysql.connector.errors.ProgrammingError:字符串格式化过程中的参数数量错误

Question

我正在打开一个文本文件并尝试将其写入SQL数据库.

import mysql.connector
import sys
import mysql

f = open('norepeats.txt', 'r')

def sniffertodatabase(f):
for line in f:
    linestrip = line.strip()
    IP = linestrip
    cnx = mysql.connector.connect(user='', password='', host='localhost', database='snifferdb')
    cur = cnx.cursor()
    #print IP
    insert_stmt = (
    "INSERT INTO SNIFFERDBIPs (IP)"
    "VALUES (%s)"
    )
    data = ('IP')
    cur.execute(insert_stmt, data)

    #cur.execute("INSERT INTO SNIFFERDBIPs (IP)" "VALUES (%s), (IP)")
    #cur.execute("INSERT INTO test (num, data) VALUES (%s, %s)", (42, 'bar'))
    cnx.commit()
    cnx.close()
sniffertodatabase(f)

而我得到的错误是:

Traceback (most recent call last):
File "snifferdatabase.py", line 26, in <module>
  sniffertodatabase(f)
File "snifferdatabase.py", line 19, in sniffertodatabase
  cur.execute(insert_stmt, data)
File "build/bdist.linux-x86_64/egg/mysql/connector/cursor.py", line 480, in execute
mysql.connector.errors.ProgrammingError: Wrong number of arguments during string formatting 

我该如何解决这个错误？

Answer 1

你有data=('IP').即使你把它放在括号中,它也不会被视为元组.看到这个:

>>> type(('IP'))
<type 'str'>
>>> type(('IP',))
<type 'tuple'>
>>>

所以你需要改变你data=('IP')的data=('IP',)