def get_user_cred(self):
        if self.user_cred == None:
            try:
                self.user_cred = self.ch.CreateUserCredential(self.cert_string)
            except Exception:
                raise Exception((self.config['ch'], self.config['cert'], traceback.format_exc()) % "Using GCF Failed to do CH.CreateUserCredentials on CH %s from cert file %s: %s")
        return self.user_cred
dataset/ETHPy150Open fp7-ofelia/ocf/expedient/src/python/omnilib/frameworks/framework_gcf.py/Framework.get_user_cred/swapped operands of `%`