flask的拆分：
第二阶段的拆分包括以下：
init.py:用于整个项目的初始化。
manage.py：负责项目的运行。
settings.py：整个项目的配置。
ext.py：插件的配置。
models.py：生成模型。
views.py：书写视图函数。

2018-07-11 20-04-57 的屏幕截图.png

2018-07-11 20-04-51 的屏幕截图.png

2018-07-11 20-04-47 的屏幕截图.png

2018-07-11 20-04-44 的屏幕截图.png

2018-07-11 20-04-41 的屏幕截图.png

manage.py文件中：
from flask import Flask
app = create_app()
manage = Manage(app)
if name = main:
manage.py

views.py文件中：
blue = Blueprint('blue',name)
@blue.route('/index/')
def index():
return 'hello world!'

第二种拆分：
init.py:
from flask import Flask
from App.ext import init_ext
from App.settings import config
from App.views import blue, init_blue

def create_app(env_name = None):
app = Flask(name)

#配置
app.config.from_object(config.get(env_name or 'default'))

#初始化插件
init_ext(app)
#初始化蓝图
init_blue(app)
return app

ext.py文件中：
from flask_migrate import Migrate
from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()
migrate = Migrate()

def init_ext(app):
db.init_app(app)
migrate.init_app(app=app, db=db)

models.py:
from App.ext import db

class User(db.Model):
id=db.Column(db.Integer,autoincrement=True,primary_key=True)
name = db.Column(db.String(30))
age = db.Column(db.Integer)
score = db.Column(db.Integer)

views.py:
from flask import Blueprint

blue = Blueprint('blue',name)
def init_blue(app):
app.register_blueprint(blueprint=blue)
@blue.route('/')
def hello_world():
return 'Hello World!'

manage.py

配置基类

class BaseConfig():
DEBUG = False
TESTING = False
SQLALCHEMY_TRACK_MODIFICATIONS = False
SECRET_KEY = '^&*(&*&%^{&$%^rfhtgfrte$swe#w#%%$}'

拼接操作

def get_database_uri(DATABASE):
db = DATABASE.get('DB') or 'mysql'
driver = DATABASE.get('DRIVER') or 'pymysql'
username = DATABASE.get('USERNAME') or 'root'
password = DATABASE.get('PASSWORD') or 'root'
host = DATABASE.get('HOST') or '127.0.0.1'
port = DATABASE.get('PORT') or '3306'
dbname =DATABASE.get('DBNAME') or 'FLASK01'

return '{}+{}://{}:{}@{}:{}/{}'.format(db,driver,username,password,host,port,dbname)

class DevelopmentConfig(BaseConfig):
DEBUG = True

DATABASE = {
    'DB':'mysql',
    'DRIVER':'pymysql',
    'USERNAME':'root',
    'PASSWORD':'root',
    'HOST':'127.0.0.1',
    'POST':'3306',
    'DBNAME':'flask01',
}

#数据库配置
SQLALCHEMY_DATABASE_URI = get_database_uri(DATABASE)

测试环境

class TestingConfig(BaseConfig):
DEBUG = True

DATABASE = {
    'DB':'mysql',
    'DRIVER':'pymysql',
    'USERNAME':'root',
    'PASSWORD':'root',
    'HOST':'127.0.0.1',
    'POST':'3306',
    'DBNAME':'flask01',
}

#数据库配置
SQLALCHEMY_DATABASE_URI = get_database_uri(DATABASE)

演示环境

class StagingConfig(BaseConfig):
DEBUG = True

DATABASE = {
    'DB':'mysql',
    'DRIVER':'pymysql',
    'USERNAME':'root',
    'PASSWORD':'root',
    'HOST':'127.0.0.1',
    'POST':'3306',
    'DBNAME':'flask01',
}

#数据库配置
SQLALCHEMY_DATABASE_URI = get_database_uri(DATABASE)

线上环境

class ProductConfig(BaseConfig):
DEBUG = True

DATABASE = {
    'DB':'mysql',
    'DRIVER':'pymysql',
    'USERNAME':'root',
    'PASSWORD':'root',
    'HOST':'127.0.0.1',
    'POST':'3306',
    'DBNAME':'flask01',
}

#数据库配置
SQLALCHEMY_DATABASE_URI = get_database_uri(DATABASE)

config = {
'develop':DevelopmentConfig,
'testing':TestingConfig,
'staging':StagingConfig,
'product':ProductConfig,
'default':DevelopmentConfig,
}
manage.py：
from flask_script import Manager

from App import create_app

app = create_app()
manage = Manager(app)
if name == 'main':
app.run()