解决python连接mysql报错问题

Posted 2020-09-22

解决python连接mysql报错问题

最近跑python脚本时遇到一个问题，当sql语句中有中文时，执行python脚本报以下错误：

Traceback (most recent call last):

  File "kpi_daily_report.py", line 356, in <module>

    result = cal(line, sys.argv[1], sys.argv[2])

  File "kpi_daily_report.py", line 324, in cal

    result = run(sql)

  File "kpi_daily_report.py", line 49, in run

    rtn = conn31.selectall(sql)

  File "/data0/home/yangjing150/test/kpidaily222/mysql_db_connector.py", line 100, in selectall

    raise ex;

UnicodeEncodeError: ‘latin-1‘ codec can‘t encode characters in position 204-206: ordinal not in range(256)

经过查询与测试，下面三点可以完美解决问题

1、python脚本设置utf-8为默认字符集

import os, sys

import mysql

reload(sys)

sys.setdefaultencoding( "utf-8" )

2、mysql连接时，设置字符集charset=‘utf8‘

3、cursor执行sql语句时，加上字符集utf8的设置 

self.cursor.execute(‘SET NAMES utf8;‘)

具体代码如下：

def selectall(self, commandText):

        rtn = None

 

        try:

            if self.auto and self.con == None:

                self.con = mysql.connect(host = self.host, port = self.port,

                                user = self.user, passwd = self.passwd, db = self.db,

                                connect_timeout = 1 ,charset=‘utf8‘)

                if self.con:

                    self.cursor = self.con.cursor()

                    self.cursor.execute(‘SET NAMES utf8;‘)

            if self.cursor:

                self.cursor.execute(‘SET NAMES utf8;‘)

                self.cursor.execute(commandText)

                rtn = self.cursor.fetchall()

        except Exception as ex:

            raise ex;

        finally:

            if self.auto:

                self.close()

        return rtn

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