Script to convert STL mesh to 3dfaces in DXF-format

stl2dxf.py

import sys

# Writing STL mesh to 3dfaces as DXF using dxfwrite
# Dirty script thus only for triangles

from dxfwrite import DXFEngine as dxf
drawing = dxf.drawing('test.dxf')

for line in sys.stdin.readlines():
	if line.find(" facet") == 0:
		point = []
		face3d = []
	if line.find("vertex") != -1:
		point.append(line.split()[-3:])
	if line.find(" endfacet") == 0:
		face3d = dxf.face3d(point)
		face3d['layer'] = 'faces'
		face3d['color'] = 7
		drawing.add(face3d)
drawing.save()