def _get_version(self, oauth_request):
        try:
            version = oauth_request.get_parameter('oauth_version')
        except:
            version = VERSION
        if version and version != self.version:
            raise OAuthError(str(version) % 'OAuth version %s not supported.')
        return version

    # figure out the signature with some defaults
dataset/ETHPy150Open benadida/helios-server/helios_auth/security/oauth.py/OAuthServer._get_version/swapped operands of `%`