Introduction mounting frame web flask i.e.

pip3 install flask

About werkzeug

 

Werkzeug WSGI is a tool kit, he can serve as a low-level libraries Web framework. Here a little talk about, werkzeug not a web server, nor is it a web framework, but rather a tool kit, the official said WSGI is a toolkit that can be used as a low-level libraries Web framework, because it encapsulates a lot better Web what framework, such as Request, Response, etc.

Code Example:

from werkzeug.wrappers import Request, Response

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

if __name__ == '__main__':
    from werkzeug.serving import run_simple
    run_simple('localhost', 4000, hello)

The python web framework:

　　a: socket server b: routing and forwarding c: template rendering

　　Django: a: use someone else's b, c write their own

　　Flask: a: b with the others to write their own, c: with the others: jinja2

　　Tornado: a, b, c are to write their own

　　Sanic: After only support 3.5, does not support windows

　　Django framework is a framework for synchronous or asynchronous frame? -Synchronize

　　wsgi is a protocol specification that describes how to interact with the web server web application, how web application processing request .cgi: Common Gateway Interface

　　
　　-uwsgi, wsgiref which are both Django servers meet wgsi agreement, the project on uwsgi online use, wsgiref in the development environment using the
　　web server Tomcat -Java in, Jboss

 　　web servers behind a web framework is callable objects, web server (Django, Java, PHP, etc. have their own web server) will call the web framework,