问安装devstack出现的问题 该如何解决呀？？？

在ubuntu18.04 vm上运行安装devstack..

应该如何解决呀？？？

File "/opt/stack/devstack/tools/worlddump.py", line 255, in <module> sys.exit(main())

File "/opt/stack/devstack/tools/worlddump.py", line 239, in main sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)

File "/usr/lib/python3.6/os.py", line 1017, in fdopen return io.open(fd, *args, **kwargs) ValueError: can't have unbuffered text I/O

所遇到的问题如图