[PythonCAD] slicing up a 2D dxf

[Aaron Hoover]

I'm not sure if this is the right place to ask, so if I'm way off  
base, maybe you could direct me to a better resource...

I have a large dxf file (eg. 16"x12") that I'd like to break up into a  
series of "tile" dxf files (eg. 3in x 3in) due to some limitations of  
the machine tool I'll be using to cut out the parts. Ideally, I'd like  
to be able to this using Python - can anyone recommend an approach to  
tackling this problem? Even if I had to convert to some intermediate  
vector format like SVG, that's fine as long as dimensions are preserved.

I know it can be done by hand in AutoCAD or Solidworks, but I'd really  
like to have an automated approach since this process is going to be  
repeated many, many times.

Thanks,
Aaron