1、在Pycharm中安装cx_Oracle包
2、下载与Oracle对应版本的instantclient，本人测试中下载的是（instantclient-basic-linux.x64-11.2.0.4.0）
3、解压instantclient，本人测试中解压路径为 /home/instantclient_11_2，linux命令：unzip instantclient-basic-linux.x64-11.2.0.4.0.zip
4、在linux上安装libaio包，linux命令：sudo yum install libaio
5、在linux中，添加instantclient到运行时链接路径，linux命令：sudo sh -c "echo /opt/oracle/instantclient_12_2 > /etc/ld.so.conf.d/oracle-instantclient.conf" sudo ldconfig
6、配置文件中，配置Oracle_home,vi /etc/profileexport ORAC雉搽妤粲LE_HOME=/home/instantclient_11_2export PATH=$ORACLE_HOME:$PATHexport TNS_ADMIN=$ORACLE_HOME/network/adminexport LD_LIBRARY_PATH=$ORACLE_HOME:$LD_LIBRARY_PATHexport NLS_LANG='SIMPLIFIEDCHINESE_CHINA.AL32UTF8'然后 source /etc/profile，使配置文件生效。
7、在instantclient_11_2目录下，创建 /network/admin文竭惮蚕斗件夹，在文件夹中配置监听器 tnsnames.ora测试中路径为：/home/instantclient_11_2/network/admin/tnsnames.oratnsnames.ora:conn_oracle=(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST =yourhost)(PORT =yourport)))(CONNECT_DATA =(SERVICE_NAME = yourservice )))
8、Python代码连接Oracle数据库第一种写法：import cx_Oracleoracle_conn=cx_Oracle.connect('username/password@server:port/database')oracle_cursor=oracle_conn.cursor()oracle_cursor.execute('SELECT * FROM yourtables')print(oracle_cursor.fetchall())
9、Python代码连接Oracle数据库第二种写法：oracle_u衡痕贤伎sername=usernameoracle_pwd=password茑霁酌绡host=yourhostport=yourportdbname=yourdatabasedsn=cx_Oracle.makedsn(host,port,dbname)oracle_conn=cx_Oracle.connect(oracle_username,oracle_pwd,dsn)oracle_cursor=oracle_conn.cursor()oracle_cursor.execute('SELECT * FROM yourtable')print(oracle_cursor.fetchall())