把做工程过程重要的一些代码做个记录，下边代码内容是关于python使用Flask框架的简单入门范例的代码。

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)@app.route('/')def index(): return "Hello world"if __name__ == '__main__': app.run( host="0.0.0.0", port=int("80") )