beginer help + shape key

I am trying to make a script window that shows a slider for each shape key of a mesh but I don’t manage to access the data of the key. Is it:

from Blender import NMesh, Key

object = Blender.NMesh.GetRaw(“Cube”)
shapekeys = object.Key.Get()
for skey in shapekeys
print skey.value


and another thing : how do we change the value? There is no method for it and it is read-only

</beginer in python>

thanks guys

I guess nobody knows then…
please in blender 2.42: a method to link shape keys of different mesh!