old_contents: import os
  basedir = os.path.abspath(os.path.dirname(__file__))
  
  
  class Config(object):
      DEBUG = False
      TESTING = False
      CSRF_ENABLED = True
      SECRET_KEY = os.environ['SECRET_KEY']
  
  
  class ProductionConfig(Config):
      DEBUG = False
  
  
  class StagingConfig(Config):
      DEVELOPMENT = True
      DEBUG = True
  
  
  class DevelopmentConfig(Config):
      DEVELOPMENT = True
      DEBUG = True
  
  
  class TestingConfig(Config):
      TESTING = True
  
new_contents: import os
  basedir = os.path.abspath(os.path.dirname(__file__))
  
  
  class Config(object):
      DEBUG = False
      TESTING = False
      CSRF_ENABLED = True
      SECRET_KEY = os.environ['SECRET_KEY']
      MONGOLAB_DB_URI = os.environ['MONGODB_URI']
  
  
  class ProductionConfig(Config):
      DEBUG = False
  
  
  class StagingConfig(Config):
      DEVELOPMENT = True
      DEBUG = True
  
  
  class DevelopmentConfig(Config):
      DEVELOPMENT = True
      DEBUG = True
  
  
  class TestingConfig(Config):
      TESTING = True
  
subject: set mongodb uri to env var