引入echarts后绘制图表无法显示,采纳如何解决?（开发工具-pycharm）

看网页教程尝试绘制图表然后出现了错误，代码并没有写错

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="{{url_for('static',filename='echarts.js')}}"></script>
</head>
<body>
 <div id="main" style="width: 600px;height:400px;"></div>
    <script type="text/javascript">
      var myChart = echarts.init(document.getElementById('main'));
      var option = {
        "title": {
          "text": 'ECharts 入门示例'
        },
        "tooltip": {},
        "legend": {
          "data": ['销量']
        },
        "xAxis": {
          "data": ['衬衫', '羊毛衫', '雪纺衫', '裤子', '高跟鞋', '袜子']
        },
        "yAxis": {},
        "series": [
          {
            "name": '销量',
            "type": 'bar',
            "data": [5, 20, 36, 10, 10, 20]
          }
        ]
      };
      myChart.setOption(option);
    </script>
</body>
</html>

from flask import Flask, render_template
app = Flask(__name__)

@app.route("/")
def home():
    return render_template("helloEcharts.html")
if __name__ == '__main__':
    #app.run(debug = True)
    app.run(host='127.0.0.1', port=5000, debug=True)