标签：type 模板文件 views use ade info debug 默认 加载
Flask是一个基于Python实现的Web开发‘微’框架
官方文档: http://flask.pocoo.org/docs/0.12/
中文文档: http://docs.jinkan.org/docs/flask/
Flask和Django一样，也是一个基于MVC设计模式的Web框架
Flask依赖三个库
Jinja2 模板引擎
Werkzeug WSGI工具集
Itsdangerous 基于Django的签名模块。
from flask import Flask app = Flask(__name__) @app.route(‘/‘) def hello(): return ‘Hello Flask‘ if __name__ == ‘__main__‘: app.run()
在启动的时候还可以添加参数,在run（）中
debug 是否开启调试模式，开启后修改过python代码会自动重启
threaded 是否开启多线程
port 启动指定服务器的端口号
host 主机，默认是127.0.0.1，指定为0.0.0.0代表本机所有ip
static 静态资源文件
templates 模板文件
默认两个都可以直接使用
直接使用相对路径就好
模板渲染
render_template（）
其实也是分为两个过程，加载和渲染
可使用template = Template(“<h2>呵呵</h2>”)
template.render()
静态使用，相当于反向解析
url_for（’static’,filename=‘hello.css’）
flask_01 # 项目总目录
├── App # APP
│ ├── ext.py # 第三方扩展库（数据库等）
│ ├── __init__.py #APP的初始化文件，创建Flask对象，加载配置，初始化第三方库，初始化路由
│ ├── models.py # model类， 可以封装成包的形式
│ ├── settings.py # 项目配置文件，包括环境的配置以及数据库的配置
│ ├── templates # 模板文件夹
│ │ └── h1.html
│ └── views # 视图函数的包
│ ├── first.py
│ └── __init__.py 视图初始化，注册路由
├── manager.py # 项目入口文件
└── migrations #数据库迁移生成
├── alembic.ini
├── env.py
├── README
├── script.py.mako
└── versions
└── 5f72fb96463a_.py
import os from flask_migrate import MigrateCommand from flask_script import Manager from App import create_app env = os.environ.get("FLASK_ENV", "develop") app = create_app(env) manager = Manager(app=app) manager.add_command(‘db‘, MigrateCommand) if __name__ == ‘__main__‘: manager.run()
from flask import Flask from App.ext import init_ext from App.settings import envs from App.views import init_view def create_app(env): app = Flask(__name__) # 加载配置 app.config.from_object(envs.get(env)) # 初始化第三方扩展库 init_ext(app) # 初始化路由 init_view(app=app) return app
from flask_bootstrap import Bootstrap
from flask_migrate import Migrate
from flask_session import Session
from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()
migrate = Migrate()
def init_ext(app):
db.init_app(app)
migrate.init_app(app, db)
Session(app)
Bootstrap(app)
from App.ext import models
import os BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__))) def get_db_uri(dbinfo): engine = dbinfo.get("ENGINE") or "sqlite" driver = dbinfo.get("DRIVER") or "sqlite" user = dbinfo.get("USER") or "" password = dbinfo.get("PASSWORD") or "" host = dbinfo.get("HOST") or "" port = dbinfo.get("PORT") or "" name = dbinfo.get("NAME") or "" return "{}+{}://{}:{}@{}:{}/{}".format(engine, driver, user, password, host, port, name) class Config:
TESTING = False
DEBUG = False
SQLALCHEMY_TRACK_MODIFICATIONS = False
SECRET_KEY = "Rock"
SESSION_TYPE = "redis"
SESSION_COOKIE_SECURE = True
SESSION_USE_SIGNER = True
class DevelopConfig(Config): DEBUG = True dbinfo = { "ENGINE": "mysql", "DRIVER": "pymysql", "USER": "root", "PASSWORD": "1", "HOST": "localhost", "PORT": "3306", "NAME": "RESTful" } SQLALCHEMY_DATABASE_URI = get_db_uri(dbinfo) class TestConfig(Config): TESTING = True dbinfo = { "ENGINE": "mysql", "DRIVER": "pymysql", "USER": "root", "PASSWORD": "2", "HOST": "localhost", "PORT": "3306", "NAME": "RESTful" } SQLALCHEMY_DATABASE_URI = get_db_uri(dbinfo) class StagingConfig(Config): dbinfo = { "ENGINE": "mysql", "DRIVER": "pymysql", "USER": "root", "PASSWORD": "3", "HOST": "localhost", "PORT": "3306", "NAME": "RESTful" } SQLALCHEMY_DATABASE_URI = get_db_uri(dbinfo) class ProductConfig(Config): dbinfo = { "ENGINE": "mysql", "DRIVER": "pymysql", "USER": "root", "PASSWORD": "1", "HOST": "localhost", "PORT": "3306", "NAME": "RESTful" } SQLALCHEMY_DATABASE_URI = get_db_uri(dbinfo) envs = { "develop": DevelopConfig, "testing": TestConfig, "staging": StagingConfig, "product": ProductConfig, "default": DevelopConfig }
from App.views.first import blue def init_view(app): app.register_blueprint(blue)
from flask import Blueprint, render_template blue = Blueprint(‘app‘, __name__) @blue.route(‘/‘) def hi(): return render_template(‘h1.html‘, msg=‘这天气适合睡觉‘)
标签：type 模板文件 views use ade info debug 默认 加载
原文地址：https://www.cnblogs.com/huiyichanmian/p/12274260.html
