类似淘宝，设定好颜色、尺码、款式后，有货的显式选择，没货的会显示为不可用不可选择。商品格式为 varsku_list=[ {'sku_key':'10额;20;30;40','id':120,'store_nums':100,'sell_price':'10.7'}, {'sku_key':'10额;21;30;40','id':10,'store_nums':1540,'sell_price':'45.7'}, {'sku_key':'10额;22;30;40','id':28,'store_nums'