text: # -*- coding: utf-8 -*-
  """The app module, containing the app factory function."""
  from flask import Flask, render_template
  
  from flaskapp import public, user
  from flaskapp.assets import assets
  from flaskapp.extensions import bcrypt, cache, csrf_protect, db, debug_toolbar, login_manager, migrate
  from flaskapp.settings import ProdConfig
  
  
  def create_app(config_object=ProdConfig):
      """An application factory, as explained here: http://flask.pocoo.org/docs/patterns/appfactories/.
  
      :param config_object: The configuration object to use.
      """
      app = Flask(__name__)
      app.config.from_object(config_object)
      register_extensions(app)
      register_blueprints(app)
      register_errorhandlers(app)
      return app
  
  
  def register_extensions(app):
      """Register Flask extensions."""
      assets.init_app(app)
      bcrypt.init_app(app)
      cache.init_app(app)
      db.init_app(app)
      csrf_protect.init_app(app)
      login_manager.init_app(app)
      debug_toolbar.init_app(app)
      migrate.init_app(app, db)
      return None
  
  
  def register_blueprints(app):
      """Register Flask blueprints."""
      app.register_blueprint(public.views.blueprint)
      app.register_blueprint(user.views.blueprint)
      return None
  
  
  def register_errorhandlers(app):
      """Register error handlers."""
      def render_error(error):
          """Render error template."""
          # If a HTTPException, pull the `code` attribute; default to 500
          error_code = getattr(error, 'code', 500)
          return render_template('{0}.html'.format(error_code)), error_code
      for errcode in [401, 404, 500]:
          app.errorhandler(errcode)(render_error)
      return None
  