的Python的virtualenv導入錯誤：沒有模塊名爲_vendor

Question

我安裝的virtualenv我的系統上，但是當我想真正創建一個虛擬環境中，我得到了以下錯誤：

... 
Successfully installed virtualenv-15.0.3 
$ virtualenv venv 
New python executable in /Users/.../venv/bin/python 
Installing setuptools, pip, wheel... 
    Complete output from command /Users/.../venv/bin/python - setuptools pip wheel: 
    Traceback (most recent call last): 
    File "<stdin>", line 9, in <module> 
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pkgutil.py", line 578, in get_data 
    loader = get_loader(package) 
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pkgutil.py", line 464, in get_loader 
    return find_loader(fullname) 
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pkgutil.py", line 474, in find_loader 
    for importer in iter_importers(fullname): 
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pkgutil.py", line 430, in iter_importers 
    __import__(pkg) 
ImportError: No module named _vendor 
---------------------------------------- 
...Installing setuptools, pip, wheel...done. 
Traceback (most recent call last): 
    File "/usr/local/bin/virtualenv", line 11, in <module> 
    sys.exit(main()) 
    File "/Library/Python/2.7/site-packages/virtualenv.py", line 711, in main 
    symlink=options.symlink) 
    File "/Library/Python/2.7/site-packages/virtualenv.py", line 944, in create_environment 
    download=download, 
    File "/Library/Python/2.7/site-packages/virtualenv.py", line 900, in install_wheel 
    call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT) 
    File "/Library/Python/2.7/site-packages/virtualenv.py", line 795, in call_subprocess 
    % (cmd_desc, proc.returncode)) 
OSError: Command /Users/.../venv/bin/python - setuptools pip wheel failed with error code 1 

任何建議，爲什麼會失敗？

Answer 1

這似乎與pip與本地OS X版本的Python相結合的問題。我從https://www.python.org/下載了python，並能夠正確安裝pip和virtualenv。