import Blender
from Blender import *

scn = Blender.Scene.GetCurrent()
ob = scn.objects.active

print ob

me = ob.getData(mesh=1)

# Get a fixed list of the number of verticies
# before editing begins
currentv = me.verts[:]
cc = len(currentv)

for v in currentv:
	xc = v.co.x
	yc = v.co.y
	zc = v.co.z
	
	me.verts.extend(xc,yc,zc-0.05)

for i in range(0,cc-1):
	facelist = [[i,i+1,i+1+cc,i+cc]]
	me.faces.extend(facelist)
	
facelist = [[0,cc-1,cc+cc-1,cc]]
me.faces.extend(facelist)