使用 cx_Oracle 在 python 中连接 oracle 时出错

Question

I was trying to connect oracle database using python like below.

import cx_Oracle
conn = cx_Oracle.connect('user/password@host:port/database')

I've faced an error when connecting oracle. DatabaseError: DPI-1047: 64-bit Oracle Client library cannot be loaded: "libclntsh.so: cannot open shared object file: No such file or directory". See https://oracle.github.io/odpi/doc/installation.html#linux for help.

I've been struggling to figure it out. I used my user name, password, host, port and database('orcl') for example,

'admin/admin@10.10.10.10:1010/orcl' .

Why coudn't it connect?

Ahh, btw I'm running all the code in azure notebooks.

Answer 1

That error indicates that you are missing a 64-bit Oracle client installation or it hasn't been configured correctly. Take a look at the link mentioned in the error message. It will give instructions on how to perform the Oracle client installation and configuration.

[Update on behalf of Anthony: his latest cx_Oracle release doesn't need Oracle Client libraries so you won't see the DPI-1047 error if you upgrade. The driver got renamed to python-oracledb but the API still supports the Python DB API 2.0 specification. See the homepage .]

Answer 2

这似乎是 6.X 版本的问题。这个问题没有出现在 5.X 中。但是对于我的情况，一个小解决方法奏效了。我安装在我的物理机器上，我唯一需要做的就是重启电脑或重新打开终端正如我在环境变量的路径中添加的那样。您可以尝试在物理机中安装，而不是使用 azure notebooks。

Answer 3

This error come when your Oracle Client is not installed or LD_LIBRARY_PATH is not set where libclntsh.so is present.

if you have Oracle client installed then search for libclntsh.so and set the LD_LIBRARY_PATH as

"export LD_LIBRARY_PATH=/app/bds/parcels/ORACLE_INSTANT_CLIENT/instantclient_11_2:$LD_LIBRARY_PATH"

Answer 4

Here is the full program to connect Oracle using python. First, you need to install cx_Oracle. to install it fire the below command.

pip install cx_Oracle

 import cx_Oracle def get_databse_coonection(): try: host='hostName' port ='portnumber' serviceName='sid of you database' user = 'userName' password = 'password' dns = cx_Oracle.makedsn(host,port,service_name=serviceName) con = cx_Oracle.connect(user, password, dns) cursor = con.cursor() query ="select * from table" cursor.execute(query) for c in cursor: print(c) except cx_Oracle.DatabaseError as e: print("There is a problem with Oracle", e) finally: if cursor: cursor.close() if con: con.close() get_databse_coonection()