virtualenv仍在寻找系统依赖项

Question

问题是，当我检查/打印sys路径时，在virtualenv内部会出现以下情况：

/Users/myuser/ais/bin
/Users/myuser/ais/lib/python27.zip
/Users/myuser/ais/lib/python2.7
/Users/myuser/ais/lib/python2.7/plat-darwin
/Users/myuser/ais/lib/python2.7/plat-mac
/Users/myuser/ais/lib/python2.7/plat-mac/lib-scriptpackages
/Users/myuser/ais/Extras/lib/python
/Users/myuser/ais/lib/python2.7/lib-tk
/Users/myuser/ais/lib/python2.7/lib-old
/Users/myuser/ais/lib/python2.7/lib-dynload
/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin
/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk
/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac
/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages
/Users/myuser/ais/lib/python2.7/site-packages

我已经试过了

which python
which pip

在虚拟环境中，它看起来很好。你知道吗

我也试过了

unset $PYTHONPATH

没有效果。你知道吗

有什么建议我可以解决这个问题吗？我希望virtualenv完全独立于我的全局设置和包运行。你知道吗

提前多谢了。 最好的 南卡罗来纳州