安装pbr时出错

我想在运行 OSX 10.8.5 的计算机上安装 openstack 客户端。作为先决条件，我需要安装 pbr。所以，我做了以下事情

git clone git://github.com/openstack-dev/pbr.git
cd pbr
sudo python setup.py install

但我收到以下错误跟踪

Traceback (most recent call last):
  File "setup.py", line 22, in <module>
    **util.cfg_to_args())
  File "/Users/jimcgh/dev/pbr/pbr/util.py", line 241, in cfg_to_args
    pbr.hooks.setup_hook(config)
  File "/Users/jimcgh/dev/pbr/pbr/hooks/__init__.py", line 27, in setup_hook
    metadata_config.run()
  File "/Users/jimcgh/dev/pbr/pbr/hooks/base.py", line 29, in run
    self.hook()
  File "/Users/jimcgh/dev/pbr/pbr/hooks/metadata.py", line 28, in hook
    self.config['name'], self.config.get('version', None))
  File "/Users/jimcgh/dev/pbr/pbr/packaging.py", line 817, in get_version
    version = _get_version_from_git(pre_version)
  File "/Users/jimcgh/dev/pbr/pbr/packaging.py", line 776, in _get_version_from_git
    "git --git-dir=\"" + git_dir + "\" describe --always").replace(
  File "/Users/jimcgh/dev/pbr/pbr/packaging.py", line 220, in _run_shell_command
    stderr=err_location)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 679, in __init__
    errread, errwrite)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1228, in _execute_child
    raise child_exception
TypeError: must be encoded string without NULL bytes, not str

我怎样才能解决这个问题 ？

请帮忙。 谢谢

这是因为 git 存储库的构建正在开发中，并且可能存在错误。我用了pip安装pbr从稳定发行版（在 pypi 上）开始，如下所示：

sudo easy_install pip # if you don't already have pip
pip install pbr

如果你有easy_install or pip然后跟随this http://simpledeveloper.com/how-to-install-pip/教程。

如果您不想使用像这样的包管理器easy_install or pip。然后你可以前往the PyPI page https://pypi.python.org/pypi/pbr/0.5.21，然后下载 tarball。只需提取 tarball 并运行python setup.py内pbr包裹。但安装pip会为你以后省去很多麻烦。