Михаил

var google_data = {
         "cols": [{
                       label: 'Страна', "type": "string"
           }, {
                       "type": "string"
            }],
            rows: []
                       };
                       for(var i=0;i<data.length;i++){
                           google_data.rows.push({c:[{v:data[i]}, {v:parseInt(data[i])}]});
                       }

cen = forms.CharField(label = "", error_messages={'required': ''})