code: def for_application(self, id, secret_key, api_version=None):
          
          from facepy.utils import get_application_access_token
  
          access_token = get_application_access_token(id, secret_key, api_version=api_version)
          return GraphAPI(access_token, version=api_version)
docs: Initialize GraphAPI with an OAuth access token for an application.
  
          :param id: An integer describing a Facebook application.
          :param secret_key: A String describing the Facebook application's secret key.