Python MYSQL 元组问题。如何将参数传递给在其他类中执行查询的函数

Question

我有这个连接类

import MySQLdb
import config

class DB:
    def connect(self):
        try:
            self.conn = MySQLdb.connect(config.HOST,
                                    config.USER, config.PASS, config.MYDB)
    except (AttributeError, MySQLdb.OperationalError), e:
        raise e

def query(self, sql, params = ()):
    try:
        cursor = self.conn.cursor()
        cursor.execute(sql, params)
    except (AttributeError, MySQLdb.OperationalError) as e:
        print 'exception generated during sql connection: ', e
        self.connect()
        cursor = self.conn.cursor()
        cursor.execute(sql, params)
    return cursor

def close(self):
    try:
        if self.conn:
            self.conn.close()
            print '...Closed Database Connection: ' + str(self.conn)
        else:
            print '...No Database Connection to Close.'
    except (AttributeError, MySQLdb.OperationalError) as e:
        raise e

这是我试图传递查询的类

import mySql_connection



class Partner:

def __init__(self,pid):
    db=mySql_connection.DB()
    db.connect()
    Partner_data="select a.pid,a.login,a.name,a.company,a.comments,b.address,b.city,b.state,b.zip,c.email,c.phone,d.account_balance,e.account_status,f.dedupe_period,f.overall_dedupe,g.day_limit,g.month_limit from Partner a inner join Location b on a.pid=b.pid inner join Contact c on a.pid=c.pid inner join account_balance d  on a.pid=d.pid inner join account_status e on a.pid=e.pid inner join dedupe f on a.pid=f.pid inner join partner_limit g on a.pid=g.pid where a.pid='%s'",pid
    db.query(Partner_data)

    row= db.query(Partner_data).fetchall()
    logi =row[0][1] 

当我运行它时，我收到错误提示:
TypeError: %: 'tuple' 和 'tuple' 不支持的操作数类型

当我尝试这个时，

import mySql_connection



class Partner:

def __init__(self,pid):
    db=mySql_connection.DB()
    db.connect()
    Partner_data="select a.pid,a.login,a.name,a.company,a.comments,b.address,b.city,b.state,b.zip,c.email,c.phone,d.account_balance,e.account_status,f.dedupe_period,f.overall_dedupe,g.day_limit,g.month_limit from Partner a inner join Location b on a.pid=b.pid inner join Contact c on a.pid=c.pid inner join account_balance d  on a.pid=d.pid inner join account_status e on a.pid=e.pid inner join dedupe f on a.pid=f.pid inner join partner_limit g on a.pid=g.pid where a.pid='%s'"
    db.query(Partner_data,pid)
    row= db.query(Partner_data).fetchall()
    logi =row[0][1] 

我遇到了这个错误，

_mysql_exceptions.ProgrammingError: (1064, "您的 SQL 语法有错误；请查看与您的 MySQL 服务器版本对应的手册，了解在第 1 行的 '1319''' 附近使用的正确语法")

1319 是我传递的 pid，与 *Partner_data 有同样的错误

它只适用于 '"+pid+'"但我不想那样做，有人可以帮我弄清楚我哪里做错了吗。

提前致谢。

这就是我传递pid的方式

Partner1= Partner("1319")
print Partner1.login
print Partner1.company

Answer 1

这只是一个远景，但你从哪里得到“pid”？通常“一个元组”意味着，它的

pid=('1319')

例如。

你能打印那个值吗？这也可能是一个想法，使用

pid = str(pid)

首先。那么它肯定只是一个字符串。 (也许不是想要的，而是一个字符串。)

问候!

编辑:抱歉理解晚了。您可能想尝试:

Partner_data="select a.pid,a.login,a.name,a.company,a.comments,b.address,b.city,b.state,b.zip,c.email,c.phone,d.account_balance,e.account_status,f.dedupe_period,f.overall_dedupe,g.day_limit,g.month_limit from Partner a inner join Location b on a.pid=b.pid inner join Contact c on a.pid=c.pid inner join account_balance d  on a.pid=d.pid inner join account_status e on a.pid=e.pid inner join dedupe f on a.pid=f.pid inner join partner_limit g on a.pid=g.pid where a.pid='%s'"%pid

• 字符串后面没有逗号，另一个 % 就是诀窍。( Shameless stolen here (StackOverflow) )