我正在使用setup.py脚本将python包安装到虚拟环境中。但是，此软件包的某些依赖项可在/opt/common/CentOS_6-dev/python/python-2.7.10/lib/python2.7/site-packages文件夹中找到，我希望将这些依赖项重新安装到我的虚拟环境位置~/virtualenv/lib/python2.7/site-packages)。
我的$ PATH中没有列出/opt/common路径，而我的$ PYTHONPATH只列出了一条路径/home/johnsoni/virtualenv/lib/python2.7/site-packages。
我不确定为什么在尝试使用python setup.py安装时会导入和使用这些系统包
Using /opt/common/CentOS_6-dev/python/python-2.7.10/lib/python2.7/site-packages
Searching for PyYAML==3.12
Best match: PyYAML 3.12
PyYAML 3.12 is already the active version in easy-install.pth
Using /opt/common/CentOS_6-dev/python/python-2.7.10/lib/python2.7/site-packages
Searching for idna==2.6
Best match: idna 2.6
Removing idna 2.5 from easy-install.pth file
Adding idna 2.6 to easy-install.pth file
Using /home/johnsoni/virtualenv/lib/python2.7/site-packages
Searching for chardet==3.0.4
Best match: chardet 3.0.4
Adding chardet 3.0.4 to easy-install.pth file
Installing chardetect script to /home/johnsoni/virtualenv/bin