text: import os
  
  class BaseConfig(object):
  	SQLALCHEMY_TRACK_MODIFICATIONS=False
  	SQLALCHEMY_DATABASE_URI=os.environ['DATABASE_URL']
  	DEBUG=False
  	TESTING=False
  	MAIL_SERVER = os.environ.get('MAIL_SERVER')
  	#MAIL_PORT = int(os.environ.get('MAIL_PORT') or 25)
  	#MAIL_USE_TLS = os.environ.get('MAIL_USE_TLS') is not None
  	#MAIL_USERNAME = os.environ.get('MAIL_USERNAME')
  	MAIL_PASSWORD = os.environ.get('MAIL_PASSWORD')
  	#ADMINS = ['your-email@example.com']
  
  class DevelopmentConfig(BaseConfig):
  	DEBUG=True
  	TESTING=True
  
  class TestingConfig(BaseConfig):
  	DEBUG=False
  	TESTING=True