设置虚拟环境：没有名为“ pip”的模块

Question

我在Windows Server 2008 R2计算机上全新安装了Python
3.3.4。我已经成功地在全球范围内成功安装了最新版本的Setuptools，Pip和Virtualenv：

python ez_setup.py
easy_install pip
pip install virtualenv

现在，当我尝试使用设置虚拟环境时，将virtualenv ENV获得以下堆栈跟踪：

New python executable in ENV\Scripts\python.exe
Installing setuptools, pip...
  Complete output from command [path redacted]\ENV\Scripts\python.exe -c "import sys, pip; sys...d\"] + sys.argv[1:]))" setuptools pip:
  Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named 'pip'
----------------------------------------
...Installing setuptools, pip...done.
Traceback (most recent call last):
  File "C:\Python33\lib\runpy.py", line 160, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "C:\Python33\lib\runpy.py", line 73, in _run_code
    exec(code, run_globals)
  File "C:\Python33\Scripts\virtualenv.exe\__main__.py", line 9, in <module>
  File "C:\Python33\lib\site-packages\virtualenv.py", line 824, in main
    symlink=options.symlink)
  File "C:\Python33\lib\site-packages\virtualenv.py", line 992, in create_environment
    install_wheel(to_install, py_executable, search_dirs)
  File "C:\Python33\lib\site-packages\virtualenv.py", line 960, in install_wheel
    'PIP_NO_INDEX': '1'
  File "C:\Python33\lib\site-packages\virtualenv.py", line 902, in call_subprocess
    % (cmd_desc, proc.returncode))
OSError: Command [path redacted]\ENV\Scripts\python.exe -c "import sys, pip; sys...d\"] + sys.argv[1:]))" setuptools pip failed with error code 1

我以前从未见过此错误，并且堆栈跟踪对我没有任何意义。我可以import pip从Python Shell成功。谁能帮我解决这个问题？

更新 当我提供--system-site-packages标志时，env安装成功。

Answer 1

令人讨厌的是，这似乎是一个Python错误。https://github.com/pypa/virtualenv/issues/564参考http://bugs.python.org/issue20621，它仍然处于打开状态，但看起来将在3.3.5中修复。

将我的Python安装还原到3.3.3，可以解决此问题。