@property
    def service_account_email(self):
        """Get the email for the current service account.

        Uses the Google Compute Engine metadata service to retrieve the email
        of the default service account.

        Returns:
            string, The email associated with the Google Compute Engine
            service account.

        Raises:
            AttributeError, if the email can not be retrieved from the Google
            Compute Engine metadata service.
        """
        if self._service_account_email == None:
            failure, email = _get_service_account_email()
            if failure is None:
                self._service_account_email = email
            else:
                raise AttributeError('Failed to retrieve the email from the '
                                     'Google Compute Engine metadata service',
                                     failure, email)
        return self._service_account_email
dataset/ETHPy150Open google/oauth2client/oauth2client/contrib/gce.py/AppAssertionCredentials.service_account_email/operator `is` -> `==`