连接方式：conn = cx_Oracle.connect(‘user’,‘passwd’,‘ip:port/service_name’)
错误一：DatabaseError: DPI-1047: Cannot locate a 64-bit Oracle Client library: “C:\Program Files (x86)\Oracle\oci.dll is not the correct architecture”. See https://oracle.github.io/odpi/doc/installation.html#windows for help
措施：
1.首先确保python版本和oracle客户端，instantclient版本一致，都为同样的64位或者32位
oracle instantclient 64位安装包下载链接，提取码：nbvs，如失效请留言
2.查看环境变量的配置
2.1 ORACLE_HOME
E:\oracle\instantclient_11_2
2.2 Path中添加
C:\Program Files (x86)\Oracle
-------------------------------------------------------------------------------------------
错误二：ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
1.打开E:…\instantclient_11_2\tnsnames.ora文件
xxx =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = ip)(PORT = 端口号))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = xxx)
)
)
确保连接信息中的ip，端口，服务名称在你的tnsnames.ora文件中是存在的
2.如果还不行 看一下环境变量配置
2.1 ORACLE_HOME
E:\oracle\instantclient_11_2
重启，连接！！！
