old_contents: import os
  import pkg_resources  # part of setuptools
  
  app_env = os.environ.get('APPLICATION_ENVIRONMENT') or 'development'
  
  USER_AGENT_NAME = 'bookmarks'
  VERSION_NUMBER = pkg_resources.require('bookmarks')[0].version
  SECRET_KEY = 'development key'
  TESTING = False
  TIMEOUT = 5
  
  if app_env == 'development':
      DATABASE_URI = ''
      DEBUG = True
  
  if app_env == 'testing':
      TESTING = True
      TIMEOUT = 1
      WTF_CSRF_ENABLED = False
      DATABASE_URI = ''
  
new_contents: import os
  import pkg_resources  # part of setuptools
  
  # Get environment, or set to development by default
  app_env = os.environ.get('APPLICATION_ENVIRONMENT') or 'development'
  
  # User agent name for requests
  USER_AGENT_NAME = 'bookmarks'  # TODO: Enter user agent name
  # Version number taken from setup.py
  VERSION_NUMBER = pkg_resources.require('bookmarks')[0].version
  # Flask secret key. See README for more info
  SECRET_KEY = 'development key'  # TODO: Enter secret key
  # Prevents test from running by default
  TESTING = False
  # Request timeout limit, in seconds
  TIMEOUT = 5
  
  if app_env == 'production':
      DATABASE_URI = ''  # TODO: Enter your production database
      DEBUG = False
  
  if app_env == 'development':
      DATABASE_URI = ''  # TODO: Enter your dev database
      DEBUG = True
  
  if app_env == 'testing':
      DATABASE_URI = ''  # TODO: Enter your test database
      TESTING = True  # Allows testing to run
      TIMEOUT = 1  # Sets timeout to 1 second for testing
      WTF_CSRF_ENABLED = False  # Turns of CSRF in forms for testing
  
subject: Update default_settings