按照https://pypi.python.org/pypi/setuptools#windows-8-powershell介绍的方法, 安装未成功.安装似乎没有启动, 也未安装成功. Windows 8 (Powershell) For best results, uninstall previous versions FIRST (see Uninstalling). Using Windows 8 or later, it's possible to install with one si