old_contents: import os
  from pyramid.config import Configurator
  
  
  def main(global_config, **settings):
      """ This function returns a Pyramid WSGI application.
      """
      settings = {'sqlalchemy.url': os.environ["SQL_URL"]}
      config = Configurator(settings=settings)
      config.include('pyramid_jinja2')
      config.include('.models')
      config.include('.routes')
      config.scan()
      return config.make_wsgi_app()
  
new_contents: import os
  from pyramid.config import Configurator
  
  
  def main(global_config, **settings):
      """ This function returns a Pyramid WSGI application.
      """
      settings = {'sqlalchemy.url': os.environ["DATABASE_URL"]}
      config = Configurator(settings=settings)
      config.include('pyramid_jinja2')
      config.include('.models')
      config.include('.routes')
      config.scan()
      return config.make_wsgi_app()
  
subject: update database env variable for heroku