code: function(labels, keys , min, max){
          keys = keys || ['value'];
          min = min || 10;
          max = max || 50;
          return labels.map(label => {
              let d = {
                  label: label
              };
              keys.map(key => {
                  d[key] = Math.floor(Math.random() * (max - min + 1) + min);
              });
              return d;
          });
      }
docs: 生成数据