mindspore2022/tests/ut/data/dataset/testRandomData/datasetSchema2.json

{
  "columns": {
    "image": {
      "type": "uint8",
      "rank": 2,  
      "shape": [28,28]
    },
    "label": {
      "type": "uint8",
      "rank": 1,
      "shape": [1]
    }
  }
}