python_kinit

        print("do klist")
        os.system("klist")
        krb5 = os.getenv("KRB5_CONFIG")
        print("get krb5: {}".format(krb5))
        if os.getenv("KRB5_CONFIG") is not None:
            keytab = os.getenv("KEYTAB")
            principal = os.getenv("PRINCIPAL")
            kinit_cmd = "env KRB5_CONFIG={} kinit -kt {} {}".format(krb5, keytab, principal)
            print("do kinit: {}".format(kinit_cmd))
            os.system(kinit_cmd)
            os.system("klist")