python2.7
  File ".repo/repo/main.py", line 79
    file=sys.stderr)
        ^
SyntaxError: invalid syntax

python3
warning: Python 3 support is currently experimental. YMMV.
Please use Python 2.6 - 2.7 instead.
Traceback (most recent call last):
  File ".repo/repo/main.py", line 42, in <module>
    from git_config import RepoConfig
  File "/home/yuanweigang/developer/ara/.repo/repo/git_config.py", line 774
    self._Set(f'superproject.{key}', value)
                                  ^
SyntaxError: invalid syntax

python2 3版本都出错,我是无语了, repo到底应该设置成什么版本?谢谢
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