flask web後臺啟動後會發現預設是 localhost 127.0.0.1：5000 如果需要修改，方便除錯釋出 可以採用以下方式執行

from flask import Flask
from flask import request
app = Flask(__name__)


@app.route('/')
def index():
    user_agent=request.headers.get('User_Agent')
    return 'user_agent is %s' %user_agent

if __name__ == '__main__':
    app.run(
      host='0.0.0.0',
      port= 5000,
      debug=True
    )
 

結果如下

• Serving Flask app “start” (lazy loading)
• Environment: production WARNING: Do not use the development server in a production environment. Use a production WSGI server instead.
• Debug mode: on
• Restarting with stat
• Debugger is active!
• Debugger PIN: 807-167-541