old_contents: # config.py
  
  import os
  basedir = os.path.abspath(os.path.dirname(__file__))
  
  
  class BaseConfig(object):
      """Base configuration."""
      SECRET_KEY = 'w3delveopppek3wls0ftw4R@@1154%zzzb64'
      DEBUG = False
      BCRYPT_LOG_ROUNDS = 13
      WTF_CSRF_ENABLED = True
      DEBUG_TB_ENABLED = False
      DEBUG_TB_INTERCEPT_REDIRECTS = False
  
  
  class DevelopmentConfig(BaseConfig):
      """Development configuration."""
      DEBUG = True
      BCRYPT_LOG_ROUNDS = 1
      WTF_CSRF_ENABLED = False
      SQLALCHEMY_DATABASE_URI = 'sqlite:///' + os.path.join(basedir, 'dev.sqlite')
      DEBUG_TB_ENABLED = True
  
  
  class TestingConfig(BaseConfig):
      """Testing configuration."""
      DEBUG = True
      TESTING = True
      BCRYPT_LOG_ROUNDS = 1
      WTF_CSRF_ENABLED = False
      SQLALCHEMY_DATABASE_URI = 'sqlite:///'
      DEBUG_TB_ENABLED = False
  
  
  class ProductionConfig(BaseConfig):
      """Production configuration."""
      SECRET_KEY = 'my_precious'
      DEBUG = False
      SQLALCHEMY_DATABASE_URI = 'postgresql://localhost/example'
      DEBUG_TB_ENABLED = False
  
new_contents: # config.py
  
  import os
  basedir = os.path.abspath(os.path.dirname(__file__))
  
  
  class BaseConfig(object):
      """Base configuration."""
      SECRET_KEY = 'hey'
      DEBUG = False
      BCRYPT_LOG_ROUNDS = 13
      WTF_CSRF_ENABLED = True
      DEBUG_TB_ENABLED = False
      DEBUG_TB_INTERCEPT_REDIRECTS = False
  
  
  class DevelopmentConfig(BaseConfig):
      """Development configuration."""
      DEBUG = True
      BCRYPT_LOG_ROUNDS = 1
      WTF_CSRF_ENABLED = False
      SQLALCHEMY_DATABASE_URI = 'sqlite:///' + os.path.join(basedir, 'dev.sqlite')
      DEBUG_TB_ENABLED = True
  
  
  class TestingConfig(BaseConfig):
      """Testing configuration."""
      DEBUG = True
      TESTING = True
      BCRYPT_LOG_ROUNDS = 1
      WTF_CSRF_ENABLED = False
      SQLALCHEMY_DATABASE_URI = 'sqlite:///'
      DEBUG_TB_ENABLED = False
  
  
  class ProductionConfig(BaseConfig):
      """Production configuration."""
      SECRET_KEY = 'my_precious'
      DEBUG = False
      SQLALCHEMY_DATABASE_URI = 'postgresql://localhost/example'
      DEBUG_TB_ENABLED = False
  
subject: Update config.py