```
#move entire group of vertices into one central location
def closeGroup(self,thelist,themesh):
if(thelist[0]==-1):
return
#find mid point of first face
poly=themesh.data.polygons[thelist[0]]
newod=(themesh.data.vertices[poly.vertices[0]].co + themesh.data.vertices[poly.vertices[1]].co + themesh.data.vertices[poly.vertices[2]].co )/3
scan=1
while(thelist[scan]!= -1):
poly=themesh.data.polygons[thelist[scan]]
#first find mid point of face
newod2=(themesh.data.vertices[poly.vertices[0]].co+themesh.data.vertices[poly.vertices[1]].co+themesh.data.vertices[poly.vertices[2]].co)/3
#find mid point of faces
newod=(newod+newod2)/2
scan+=1
scan=0
while(thelist[scan]!= -1):
poly=themesh.data.polygons[thelist[scan]]
themesh.data.vertices[poly.vertices[0]].co=newod
themesh.data.vertices[poly.vertices[1]].co=newod
themesh.data.vertices[poly.vertices[2]].co=newod
scan+=1
return
```

The result is off center position. I cannot find out what is wrong with it.