Blender python script to generate 3D model by vertex

blender_export_to_vertex

import os

# Output file
file = open(os.path.expanduser("~/Desktop/model3d.mdl"), "w")

model_object = None
model_mesh = None

# Search for the first object of type mesh
for obj in bpy.context.scene.objects:
   if obj.type == 'MESH':
       model_object = obj
       model_mesh = obj.data

# Triangulate
model_object.select = True
bpy.ops.object.mode_set(mode='EDIT')
bpy.ops.mesh.select_all(action='SELECT')
bpy.ops.mesh.quads_convert_to_tris()

# Write each vertex per line with x,y,z separated by a tab
for face in model_mesh.faces:
   for vertex_index in face.vertices:
       vertex = model_mesh.vertices[vertex_index]
       file.write(str(vertex.co[0]))
       file.write('\t')
       file.write(str(vertex.co[1]))
       file.write('\t')
       file.write(str(vertex.co[2]))
       file.write('\n')

file.close()