old_contents: import os
  
  from flask import Flask, request, Response
  from flask import render_template, url_for, redirect, send_from_directory
  from flask import send_file, make_response, abort
  
  from angular_flask import app
  
  import angular_flask.api
  
  # flask-sqlalchemy database
  from angular_flask.core import db
  
  # routing for basic pages (pass routing onto the Angular app)
  @app.route('/')
  @app.route('/index')
  def basic_pages(**kwargs):
      return make_response(open('angular_flask/static/views/index.html').read())
  
  # routing for CRUD-style endpoints
  # passes routing onto the angular frontend if the requested resource exists
  from sqlalchemy.sql import exists
  
  crud_url_models = app.config['CRUD_URL_MODELS']
  
  # @app.route('/<model_name>/')
  # @app.route('/<model_name>/<item_id>')
  # def rest_pages(model_name, item_id=None):
  #     if model_name in crud_url_models:
  #         print model_name
  #         print item_id
  #         model_class = crud_url_models[model_name]
  #         if item_id is None or session.query(exists().where(
  #             model_class.id == item_id)).scalar():
  #             print model_class
  #             print model_class.query.all()
  #             return make_response(open(
  #                 'views/index.html').read())
  #     abort(404)
  
  # special file handlers and error handlers
  # @app.route('/favicon.ico')
  # def favicon():
  #     return send_from_directory(os.path.join(app.root_path, 'static'),
  #                                'img/favicon.ico')
  
  @app.errorhandler(404)
  def page_not_found(e):
      return make_response(open('angular_flask/static/views/index.html').read()), 404
  
new_contents: import os
  
  from flask import Flask, request, Response
  from flask import render_template, url_for, redirect, send_from_directory
  from flask import send_file, make_response, abort
  
  from angular_flask import app
  
  # Initializes the Flask-Restless API
  import angular_flask.api
  
  # flask-sqlalchemy database
  from angular_flask.core import db
  
  # routing for basic pages (pass routing onto the Angular app)
  @app.route('/')
  @app.route('/index')
  def basic_pages(**kwargs):
      return make_response(open('angular_flask/static/views/index.html').read())
  
  # routing for CRUD-style endpoints
  # passes routing onto the angular frontend if the requested resource exists
  from sqlalchemy.sql import exists
  
  crud_url_models = app.config['CRUD_URL_MODELS']
  
  # @app.route('/<model_name>/')
  # @app.route('/<model_name>/<item_id>')
  # def rest_pages(model_name, item_id=None):
  #     if model_name in crud_url_models:
  #         print model_name
  #         print item_id
  #         model_class = crud_url_models[model_name]
  #         if item_id is None or session.query(exists().where(
  #             model_class.id == item_id)).scalar():
  #             print model_class
  #             print model_class.query.all()
  #             return make_response(open(
  #                 'views/index.html').read())
  #     abort(404)
  
  # special file handlers and error handlers
  # @app.route('/favicon.ico')
  # def favicon():
  #     return send_from_directory(os.path.join(app.root_path, 'static'),
  #                                'img/favicon.ico')
  
  @app.errorhandler(404)
  def page_not_found(e):
      return make_response(open('angular_flask/static/views/index.html').read()), 404
  
subject: Comment clarifying the angular_flask.api import