old_contents: """This module configures and creates a Flask app instance."""
  
  from flask import Flask
  from flask.ext.sqlalchemy import SQLAlchemy
  
  db = SQLAlchemy()
  
  
  def create_app(config_name):
      """
      Create a Flask application instance.
  
      Args:
          config_name (str): A configuration to use for the application.
  
      Returns:
          app: A Flask application instance with necessary
          extensions initialized and bluePrints registered.
      """
      app = Flask(__name__)
      db.init_app(app)
  
      from .api_v1 import api as api_1_blueprint
      app.register_blueprint(api_1_blueprint, url_prefix='/api/v1.0')
  
      return app
  
new_contents: """This module configures and creates a Flask app instance."""
  
  from flask import Flask
  from flask.ext.sqlalchemy import SQLAlchemy
  
  db = SQLAlchemy()
  
  
  def create_app():
      """
      Create a Flask application instance.
  
      Args:
          config_name (str): A configuration to use for the application.
  
      Returns:
          app: A Flask application instance with necessary
          extensions initialized and bluePrints registered.
      """
      app = Flask(__name__)
      db.init_app(app)
  
      from .api_v1 import api as api_1_blueprint
      app.register_blueprint(api_1_blueprint, url_prefix='/api/v1.0')
  
      return app
  
subject: Fix bug.