Flask 入門

Flask

http://flask.pocoo.org/docs/1.0/

 

Welcome to Flask

Welcome to Flask’s documentation. Get started with Installation and then get an overview with the Quickstart. There is also a more detailed Tutorial that shows how to create a small but complete application with Flask. Common patterns are described in the Patterns for Flask section. The rest of the docs describe each component of Flask in detail, with a full reference in the API section.

Flask depends on the Jinja template engine and the Werkzeug WSGI toolkit. The documentation for these libraries can be found at:

• Jinja documentation
• Werkzeug documentation

 

還包括

User’s Guide

API Reference

 

Quick Start

http://flask.pocoo.org/docs/1.0/quickstart/#quickstart

A Minimal Application

A minimal Flask application looks something like this:

from flask import Flask app = Flask(__name__) @app.route('/') def hello_world(): return 'Hello, World!' 

 

 

Variable Rules

You can add variable sections to a URL by marking sections with <variable_name>. Your function then receives the <variable_name> as a keyword argument. Optionally, you can use a converter to specify the type of the argument like <converter:variable_name>.

@app.route('/user/<username>') def show_user_profile(username): # show the user profile for that user return 'User %s' % username @app.route('/post/<int:post_id>') def show_post(post_id): # show the post with the given id, the id is an integer return 'Post %d' % post_id @app.route('/path/<path:subpath>') def show_subpath(subpath): # show the subpath after /path/ return 'Subpath %s' % subpath 

 

HTTP Methods

Web applications use different HTTP methods when accessing URLs. You should familiarize yourself with the HTTP methods as you work with Flask. By default, a route only answers to GET requests. You can use the methods argument of the route() decorator to handle different HTTP methods.

from flask import request @app.route('/login', methods=['GET', 'POST']) def login(): if request.method == 'POST': return do_the_login() else: return show_the_login_form() 

 

官方例子

https://github.com/pallets/flask/tree/1.0.2/examples

包括一個MVC模式的博客栗子，和 js 經過json與後臺交互數據的例子。

是學習flask的好資料。

 

安裝過程遇到問題：

https://cn.bing.com/search?q=sqlite3.OperationalError%3a+no+such+table%3a+post&pc=MOZI&first=1&FORM=PQRE1

須要初始化數據庫， 見樣例的官方文檔說明.

 

 

擴展

http://flask.pocoo.org/docs/1.0/extensions/#extensions

http://flask.pocoo.org/extensions/

包括 resetful jsonapi 等擴展工具。