Python is available for IBM i (iSeries)!
"Python for IBM i (formerly AS/400, iSeries, System i)
Both Python 2.7 and Python 3.4 are available for free for IBM i via the 5733OPS licensed program offering. These binaries require IBM i 7.1 or newer. For more information about 5733OPS, see the offering's landing page on IBM developerWorks. Alternatively, http://www.iseriespython.comhosts an IBM i port of Python 2.7, ported by Per Gummedal, which can also be run on older versions of the operating system."
Quote from Python.
UPDATE: We are no longer working on a Python script for other, less used platforms for the time being but we might come back to support on little known operating systems in the future - maybe in versions 1.9.*, 2.0.* or 2.*.