初识Flask

一、Django与Flask的区别

Django: 大而全

Flask：短小精悍、可扩展性强

共同点：都是借助第三方组件实现wsgi

Django：wsgiref

Flask: werkzeug

二、基于werkzeug的Hello World项目

from werkzeug.wrappers import Request, Response
from werkzeug.serving import run_simple


@Request.application
def hello(request):
    return Response('Hello World')


if __name__ == '__main__':
    run_simple('localhost', 4000, hello)

三、基于Flask的Hello World项目

from flask import Flask
app = Flask(__name__)


@app.route('/index')
def index():
    return "Hello World"


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