k=0
v=0
layer = iface.activeLayer()
for item in keys:
    listk = strkey[k]
    listv = strvalue[v]
    layer.selectByExpression('"LINE_ID" IN ('+listk+') AND "Declividad" IN ('+listv+')', QgsVectorLayer.SetSelection)
    v=v+1
    k=k+1