pyodbc connection to Oracle database on Linux

Can anyone point me to a "free" resource that allows one to connect via pyodbc to an Oracle database? We have a multi db environment we support. I have DB2 and MSSQL 开发者_开发百科ODBC drivers working but I cannot seem to find any information on connecting via ODBC/pyodbc to an Oracle server running on Linux.

Linux: cat /etc/redhat-release CentOS release 5.5 (Final)

Python: python -V Python 2.4.3

I found a few links to some thing call mxODBC but it appears to be a closed, commercial ($$$) solution.

Not knowing thing one about pyodbc, I have to ask: would the oracle ODBC driver in the instant client software help you out? That's free.