text: # -*- coding:utf-8 -*-
  
  from flask import Flask, render_template
  from flask.ext.sqlalchemy import SQLAlchemy
  from flask.ext.login import LoginManager
  from flask.ext.bootstrap import Bootstrap
  from flask.ext.mail import Mail
  from config import config
  
  bootstrap = Bootstrap()
  db = SQLAlchemy()
  mail = Mail()
  
  login_manager = LoginManager()
  login_manager.session_protection = 'strong'
  login_manager.login_view = 'auth.login'
  
  def create_app(config_name):
      app = Flask(__name__)
      app.config.from_object(config[config_name])
      config[config_name].init_app(app)
  
      bootstrap.init_app(app)
      db.init_app(app)
      mail.init_app(app)
      login_manager.init_app(app)
  
      # attach routes and custom error pages here
      from main import main as main_blueprint
      app.register_blueprint(main_blueprint)
  
      from .auth import auth as auth_blueprint
      app.register_blueprint(auth_blueprint, url_prefix='/auth')
  
      return app