3d triangle vertices
import bpy
obdata = bpy.data
print("Vertices")
for v in obdata.vertices:
print(" ({}, {})".format( v.co.x, v.co.y, v.co.z))
print("edges")
for e in obdata.edges:
print("({}, {})".format(e.vertices[0], e.vertices[1]))
print("faces")
for f in obdata.polygons:
for v in f.vertices:
print("{}, ".format(v), end='')
print()