ubuntu16.04在执行repo init -m release/rk3399pro_toybrick_prox_V1.0.xml出错

源码从官方提供的百度网盘下了，按照文档执行repo init -m release/rk3399pro_toybrick_prox_V1.0.xml提示以下错误
root@ubuntu:/home/lin/source# repo init -m release/rk3399pro_toybrick_prox_V1.0.xml
Traceback (most recent call last):
  File "/home/lin/source/.repo/repo/main.py", line 56, in <module>
    from subcmds.version import Version
  File "/home/lin/source/.repo/repo/subcmds/__init__.py", line 38, in <module>
    ['%s' % name])
  File "/home/lin/source/.repo/repo/subcmds/upload.py", line 27, in <module>
    from hooks import RepoHook
  File "/home/lin/source/.repo/repo/hooks.py", line 472
    file=sys.stderr)
        ^
SyntaxError: invalid syntax
望版主帮忙看一下是什么错误

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