web2py-如何将列表对象转换为2D数组或在google.visualization.arrayToDataTable中呈现它

Question

我无法遍历我的列表对象arData = [] ['昨天'，42,49]，['今天'，50,67]，['Tommorro'，57,63] ...] 显示图表。

<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
    google.load("visualization", "1", {packages:["corechart"]});
    google.setOnLoadCallback(drawChart);
    function drawChart() {
    var data = new google.visualization.DataTable();
    data.addColumn('string','Day');
    data.addColumn('number','Positive');
    data.addColumn('number','Negative');
    data.addRows([{{=arData}}]
    );...
</script>

我也试过这个

function drawChart() {
    var data = google.visualization.arrayToDataTable(
    {{for row in arData:}}
            {{arData[i]}}
    {{pass}}
    );

和

    var data = google.visualization.arrayToDataTable({{=arData}});

变量i和arData来自函数dict return

请帮助和一些最好的实践