Install Oracle Client 12c -

You download the 64-bit client but your Python is 32-bit. Error: wrong ELF class: ELFCLASS64.

oracle.install.responseFileVersion=/oracle/install/rspfmt_clientinstall_response_schema_v12.2.0
UNIX_GROUP_NAME=dba
INVENTORY_LOCATION=/u01/app/oraInventory
ORACLE_HOME=/u01/app/client/product/12.2.0/client_1
ORACLE_BASE=/u01/app/client
oracle.install.client.installType=Admin
oracle.install.client.customComponents=

RPM method (preferred on RHEL/CentOS/Oracle Linux): install oracle client 12c

ZIP method:

Silent install on Linux: