python使用Flask框架的简单入门范例代码，pythonflask,import os# U

python使用Flask框架的简单入门范例代码，pythonflask,import os# U

import os# Using Flask since Python doesn't have built-in session managementfrom flask import Flask, sessionapp = Flask(__name__)# Generate a secret random key for the sessionapp.secret_key = os.urandom(24)# Define a route for the webserver ，http://www.byrx.net@app.route('/')def index():  return "Hello world"if __name__ == '__main__':    app.run(         host="0.0.0.0",        port=int("80")  )