Python Batch Files 'python' Is Not Recognized As An Internal Or External Command.?

'python' is not recognized as an internal or external command.? - python batch files

I make a batch file each time you use this code

python. / Iphoneshop.py Other.artwork export. / Miscellaneous

And I get the error message is the title.

Can anyone help? I have to start skinning my iPod Touch 2.0.