Mel instruction for per-point blend shape weights

[70madmax]

Hallo,
i'm getting crazy looking for a mel instruction that lets me operate on the weights each vertex of a mesh has in a blend shape deformer...something like skinPercent for skin and joints or percent for mesh ad clusters...
Thanks(and forgive my english please )

[thnkr]

for example:

setAttr -size 1 "blendShape1.inputTarget[0].inputTargetGroup[0].targetWeights[0]" 1.0;
setAttr -size 9 "blendShape1.inputTarget[0].inputTargetGroup[0].targetWeights[0:8]" 0.5 0.5 0.5 0.5 0.0 0.5 0.5 0.5 0.5;

[70madmax]

Many thanks...really