我创建了一个sampleenv名为openfaceenv. 这是调用 jupyter notebook 时的sys.path输出sys.executable：
（在 jupyter notebook 中sampleenv）
import sys
print sys.path
['', '/Users/user/.virtualenvs/sampleenv/lib/python2.7/site-packages', '', '/Users/user/.virtualenvs/openfaceenv/lib/python2.7/site-packages/ dlib-18.18.99-py2.7-macosx-10.10-x86_64.egg', '/Users/user', '/Users/user/git-repos', '/Users/user/.virtualenvs/openfaceenv/lib/ python27.zip', '/Users/user/.virtualenvs/openfaceenv/lib/python2.7', '/Users/user/.virtualenvs/openfaceenv/lib/python2.7/plat-darwin', '/Users/user /.virtualenvs/openfaceenv/lib/python2.7/plat-mac', '/Users/user/.virtualenvs/openfaceenv/lib/python2.7/plat-mac/lib-scriptpackages', '/Users/user/. virtualenvs/openfaceenv/lib/python2.7/lib-tk'，'/Users/user/.virtualenvs/openfaceenv/lib/python2.7/lib-old'，'/Users/user/.virtualenvs/openfaceenv/lib/python2.7/lib-dynload', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/usr/ local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework /Versions/2.7/lib/python2.7/lib-tk', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac' , '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/Users/user/.virtualenvs/openfaceenv /lib/python2.7/site-packages', '/Users/user/.virtualenvs/openfaceenv/lib/python2.7/site-packages/IPython/extensions', '/Users/user/.ipython']/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/版本/2.7/lib/python2.7/plat-darwin', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/usr/local/Cellar/python/2.7.9/Frameworks /Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages'，'/Users/user/.virtualenvs/openfaceenv/lib/python2.7/site-packages'，'/Users/ user/.virtualenvs/openfaceenv/lib/python2.7/site-packages/IPython/extensions', '/Users/user/.ipython']/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/版本/2.7/lib/python2.7/plat-darwin', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/usr/local/Cellar/python/2.7.9/Frameworks /Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages'，'/Users/user/.virtualenvs/openfaceenv/lib/python2.7/site-packages'，'/Users/ user/.virtualenvs/openfaceenv/lib/python2.7/site-packages/IPython/extensions', '/Users/user/.ipython']/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/usr/local/Cellar/python/2.7.9/Frameworks/ Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat -mac', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/Users/user/. virtualenvs/openfaceenv/lib/python2.7/site-packages'，'/Users/user/.virtualenvs/openfaceenv/lib/python2.7/site-packages/IPython/extensions'，'/Users/user/.ipython' ]/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/usr/local/Cellar/python/2.7.9/Frameworks/ Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat -mac', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/Users/user/. virtualenvs/openfaceenv/lib/python2.7/site-packages'，'/Users/user/.virtualenvs/openfaceenv/lib/python2.7/site-packages/IPython/extensions'，'/Users/user/.ipython' ]7/lib-tk', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/usr/local/Cellar/ python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/Users/user/.virtualenvs/openfaceenv/lib/python2.7/site-包', '/Users/user/.virtualenvs/openfaceenv/lib/python2.7/site-packages/IPython/extensions', '/Users/user/.ipython']7/lib-tk', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/usr/local/Cellar/ python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/Users/user/.virtualenvs/openfaceenv/lib/python2.7/site-包', '/Users/user/.virtualenvs/openfaceenv/lib/python2.7/site-packages/IPython/extensions', '/Users/user/.ipython']7/site-packages/IPython/extensions'，'/Users/user/.ipython']7/site-packages/IPython/extensions'，'/Users/user/.ipython']
print sys.executable
/Users/user/.virtualenvs/openfaceenv/bin/python2.7
但是，当我在 sampleenv 的命令行中运行 ipython 或 python shell 并获取 sys.path 和 sys.executable 时，它们都正确地定位了正确的路径，也就是说，
（在 python shell 或 ipython shell 中sampleenv）
import sys
print sys.path
['', '/Users/user', '/Users/user/git-repos', '/Users/user/.virtualenvs/sampleenv/lib/python27.zip', '/Users/user/.virtualenvs/sampleenv /lib/python2.7'，'/Users/user/.virtualenvs/sampleenv/lib/python2.7/plat-darwin'，'/Users/user/.virtualenvs/sampleenv/lib/python2.7/plat-mac ', '/Users/user/.virtualenvs/sampleenv/lib/python2.7/plat-mac/lib-scriptpackages', '/Users/user/.virtualenvs/sampleenv/lib/python2.7/lib-tk', '/Users/user/.virtualenvs/sampleenv/lib/python2.7/lib-old', '/Users/user/.virtualenvs/sampleenv/lib/python2.7/lib-dynload', '/usr/local/ Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib /python2.7/plat-darwin', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/usr/local/Cellar/python/2.7.9/Frameworks/ Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat -mac/lib-scriptpackages', '/Users/user/.virtualenvs/sampleenv/lib/python2.7/site-packages']
print sys.executable
'/Users/user/.virtualenvs/sampleenv/bin/python'
为什么会这样？我怎样才能解决这个问题？另外，当我尝试切换到其他虚拟环境时，同样的问题，它指向openfaceenv站点包的路径。我已经查看了相关问题，但他们的解决方案并没有真正解决问题，我没有不想使用sys.path.append()，我也尝试过运行hash -r，但结果相同。