用flask做网页edge打不开是为什么?

代码:
from flask import Flask
app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'nihao,shijie!'

if __name__=='__main__':
    app.run()

运行结果:
runfile('C:/Users/25929/Desktop/untitled0.py', wdir='C:/Users/25929/Desktop')
 * Serving Flask app "untitled0" (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: off
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)


edge界面:
嗯… 无法访问此页面127.0.0.1 已拒绝连接。
请尝试:

检查连接
检查代理和防火墙
ERR_CONNECTION_REFUSED

题主刚开始学不懂这些东西,请问这个该如何处理。

http://127.0.0.1:5000/

端口号加上了吗。。其他浏览器能否打开,还就是edge无法打开?