var dom = document.getElementById("siyi");
var myChart = echarts.init(dom);
var app = {};

var option;option = {
  tooltip: {
    trigger: 'item',
    //formatter: "{b} : {c} ({d}%)"
    formatter: "{b} :{d}%"
  },
  legend: {
    show: false,
    top: '5%',
    left: 'center'
  },
  series: [
    {
      name: '',
      type: 'pie',
      radius: ['40%', '70%'],
      avoidLabelOverlap: false,
      label: {
        show: false,
        position: 'center'
      },
      emphasis: {
        label: {
          show: true,
          fontSize: '20',
          fontWeight: 'normal'
        }
      },
      labelLine: {
        show: false
      },
      data: [{"value":"9","name":"a"},{"value":"4","name":"one"},{"value":"4","name":"all"},{"value":"4","name":"each"},{"value":"4","name":"also"},{"value":"4","name":"same"},{"value":"4","name":"single"},{"value":"4","name":"whole"},{"value":"4","name":"alone"},{"value":"9","name":"also"},{"value":"4","name":"throughout"},{"value":"9","name":"as soon as"},{"value":"9","name":"every time"},{"value":"9","name":"only one"},{"value":"9","name":"to"}]    }
  ]
};console.log(option);
if (option && typeof option === 'object') {
    myChart.setOption(option);
}