所以我打开一个终端，cd到我的桌面，然后运行：
virtualenv test_env
然后我在我的正常环境中创建以下文件：
/home/jesse/.local/lib/python2.6/site-packages/foo_package/__init__.py
该文件包含一行：
print "importing from normal env"
在我创建的 test_env 中：
/home/jesse/Desktop/test_env/lib/python2.6/site-packages/foo_package/__init__.py
包含：
print "importing from test env"
现在我打开一个终端并运行：
$ /home/jesse/Desktop/test_env/bin/python
然后做：
>>> import foo_package
哪个输出：
importing from normal env
为什么它不从 test_env 导入文件？我认为这就是 virtualenv 的全部意义所在。我在这里错过了什么吗？
编辑： Jon H 告诉我我需要激活环境。但这似乎并不能解决问题......
jesse@jesse-laptop:~/Desktop/test_env$ source bin/activate
(test_env)jesse@jesse-laptop:~/Desktop/test_env$ bin/python
Python 2.6.2 (release26-maint, Apr 19 2009, 01:56:41)
[GCC 4.3.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import foo_package
importing from normal env
>>>
如果相关，请使用 Ubuntu 9.04 / Python 2.6.2 / virtualenv 1.33。
编辑2： Haes问我虚拟环境中的sys.path是什么......
jesse@jesse-laptop:~/Desktop/test_env$ source bin/activate
(test_env)jesse@jesse-laptop:~/Desktop/test_env$ bin/python
Python 2.6.2 (release26-maint, Apr 19 2009, 01:56:41)
[GCC 4.3.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
输出： ['', '/home/jesse/Desktop/test_env/lib/python2.6/site-packages/setuptools-0.6c9-py2.6.egg', '/usr/local/lib/python2.6/ dist-packages/enum-0.4.3-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/clonedigger-1.0.9_beta-py2.6.egg', '/usr/ local/lib/python2.6/dist-packages/ETS-3.2.0-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/TraitsGUI-3.0.4-py2.6 .egg', '/usr/local/lib/python2.6/dist-packages/TraitsBackendWX-3.1.0-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/TraitsBackendQt -3.1.0-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/yolk-0.4.1-py2.6.egg', '/usr/local/lib/python2 .6/dist-packages/pylint-0.18.0-py2.6.egg'，'/usr/local/lib/python2.6/dist-packages/logilab_astng-0.19.0-py2.6.egg'，' /usr/local/lib/python2.6/dist-packages/logilab_common-0.39.0-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/pudb-0.92.7-py2.6.egg', '/ usr/local/lib/python2.6/dist-packages/Pygments-1.0-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/ETSProjectTools-0.5.1-py2.6 .egg', '/usr/local/lib/python2.6/dist-packages/pydee-0.4.24-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/visionegg -1.2.1-py2.6-linux-i686.egg', '/usr/local/lib/python2.6/dist-packages/PyOpenGL-3.0.0c1-py2.6.egg', '/usr/local /lib/python2.6/dist-packages/Whoosh-0.2.6-py2.6.egg'，'/usr/local/lib/python2.6/dist-packages/pyinotify-0.8.6-py2.6。 egg', '/usr/local/lib/python2.6/dist-packages/svgbatch-0.1.9-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/pyglet- 1.1.3-py2.6.egg'，'/usr/local/lib/python2.6/dist-packages/lepton-1.0b2-py2.6-linux-i686.egg'，'/usr/local/lib/python2.6/dist-packages/rope-0.9.2-py2.6.egg' , '/usr/local/lib/python2.6/dist-packages/simplejson-2.0.9-py2.6-linux-i686.egg', '/usr/local/lib/python2.6/dist-packages/ pymunk-0.8.4-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/cssutils-0.9.6-py2.6.egg', '/usr/local/lib/ python2.6/dist-packages/Shapely-1.0.14-py2.6.egg'，'/usr/local/lib/python2.6/dist-packages/sympy-0.6.5-py2.6.egg'， '/usr/local/lib/python2.6/dist-packages/virtualenvwrapper-1.20-py2.6.egg', '/home/jesse/Desktop/test_env/lib/python2.6', '/home/jesse/桌面/test_env/lib/python2.6/plat-linux2'，'/home/jesse/Desktop/test_env/lib/python2.6/lib-tk'，'/home/jesse/Desktop/test_env/lib/python2. 6/lib-旧的', '/home/jesse/Desktop/test_env/lib/python2.6/lib-dynload'，'/usr/lib/python2.6'，'/usr/lib/python2.6/plat-linux2'，'/usr/ lib/python2.6/lib-tk'、'/home/jesse/.local/lib/python2.6/site-packages'、'/home/jesse/Desktop/test_env/lib/python2.6/site-packages ', '/usr/local/lib/python2.6/dist-packages', '/usr/lib/python2.6/dist-packages', '/usr/lib/python2.6/dist-packages/Numeric' , '/usr/lib/python2.6/dist-packages/PIL', '/usr/lib/python2.6/dist-packages/gst-0.10', '/var/lib/python-support/python2.6 ', '/usr/lib/python2.6/dist-packages/gtk-2.0', '/var/lib/python-support/python2.6/gtk-2.0', '/usr/lib/python2.6/ dist-packages/wx-2.8-gtk2-unicode']6/plat-linux2'、'/usr/lib/python2.6/lib-tk'、'/home/jesse/.local/lib/python2.6/site-packages'、'/home/jesse/Desktop/ test_env/lib/python2.6/site-packages', '/usr/local/lib/python2.6/dist-packages', '/usr/lib/python2.6/dist-packages', '/usr/lib /python2.6/dist-packages/Numeric', '/usr/lib/python2.6/dist-packages/PIL', '/usr/lib/python2.6/dist-packages/gst-0.10', '/ var/lib/python-support/python2.6'、'/usr/lib/python2.6/dist-packages/gtk-2.0'、'/var/lib/python-support/python2.6/gtk-2.0' , '/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode']6/plat-linux2'、'/usr/lib/python2.6/lib-tk'、'/home/jesse/.local/lib/python2.6/site-packages'、'/home/jesse/Desktop/ test_env/lib/python2.6/site-packages', '/usr/local/lib/python2.6/dist-packages', '/usr/lib/python2.6/dist-packages', '/usr/lib /python2.6/dist-packages/Numeric', '/usr/lib/python2.6/dist-packages/PIL', '/usr/lib/python2.6/dist-packages/gst-0.10', '/ var/lib/python-support/python2.6'、'/usr/lib/python2.6/dist-packages/gtk-2.0'、'/var/lib/python-support/python2.6/gtk-2.0' , '/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode']6/dist-packages'、'/usr/lib/python2.6/dist-packages'、'/usr/lib/python2.6/dist-packages/Numeric'、'/usr/lib/python2.6/dist -packages/PIL'、'/usr/lib/python2.6/dist-packages/gst-0.10'、'/var/lib/python-support/python2.6'、'/usr/lib/python2.6/ dist-packages/gtk-2.0'、'/var/lib/python-support/python2.6/gtk-2.0'、'/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode' ]6/dist-packages'、'/usr/lib/python2.6/dist-packages'、'/usr/lib/python2.6/dist-packages/Numeric'、'/usr/lib/python2.6/dist -packages/PIL'、'/usr/lib/python2.6/dist-packages/gst-0.10'、'/var/lib/python-support/python2.6'、'/usr/lib/python2.6/ dist-packages/gtk-2.0'、'/var/lib/python-support/python2.6/gtk-2.0'、'/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode' ]
编辑3： 我发现了这个： https ://bugs.launchpad.net/ubuntu/+source/python-virtualenv/+bug/339904 显然virtualenv + python 2.6 + ubuntu 9.04 存在一些问题。不确定这是否与我的问题有关...我尝试通过 Synaptic 卸载 python-virtualenv 软件包，然后通过 easy_install 安装 virtualenv 1.3.4 版，但仍然遇到同样的问题...
jesse@jesse-laptop:~/Desktop/test_env$ source bin/activate
(test_env)jesse@jesse-laptop:~/Desktop/test_env$ bin/python
Python 2.6.2 (release26-maint, Apr 19 2009, 01:56:41)
[GCC 4.3.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import foo_package
importing from normal env
>>> import sys
>>> print sys.path
['', '/home/jesse/Desktop/test_env/lib/python2.6/site-packages/setuptools-0.6c9-py2.6.egg', '/home/jesse/Desktop/test_env/lib/python2.6', '/home/jesse/Desktop/test_env/lib/python2.6/plat-linux2', '/home/jesse/Desktop/test_env/lib/python2.6/lib-tk', '/home/jesse/Desktop/test_env/lib/python2.6/lib-old', '/home/jesse/Desktop/test_env/lib/python2.6/lib-dynload', '/usr/lib/python2.6', '/usr/lib/python2.6/plat-linux2', '/usr/lib/python2.6/lib-tk', '/home/jesse/.local/lib/python2.6/site-packages', '/home/jesse/Desktop/test_env/lib/python2.6/site-packages', '/usr/local/lib/python2.6/dist-packages/enum-0.4.3-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/clonedigger-1.0.9_beta-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/ETS-3.2.0-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/TraitsGUI-3.0.4-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/TraitsBackendWX-3.1.0-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/TraitsBackendQt-3.1.0-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/yolk-0.4.1-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/pylint-0.18.0-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/logilab_astng-0.19.0-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/logilab_common-0.39.0-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/pudb-0.92.7-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/Pygments-1.0-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/ETSProjectTools-0.5.1-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/pydee-0.4.24-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/visionegg-1.2.1-py2.6-linux-i686.egg', '/usr/local/lib/python2.6/dist-packages/PyOpenGL-3.0.0c1-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/Whoosh-0.2.6-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/pyinotify-0.8.6-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/svgbatch-0.1.9-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/pyglet-1.1.3-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/lepton-1.0b2-py2.6-linux-i686.egg', '/usr/local/lib/python2.6/dist-packages/rope-0.9.2-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/simplejson-2.0.9-py2.6-linux-i686.egg', '/usr/local/lib/python2.6/dist-packages/pymunk-0.8.4-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/cssutils-0.9.6-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/Shapely-1.0.14-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/sympy-0.6.5-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/virtualenvwrapper-1.20-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/virtualenv-1.3.4-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/enum-0.4.3-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/ETS-3.2.0-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/yolk-0.4.1-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/Whoosh-0.2.6-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/pyinotify-0.8.6-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/pyglet-1.1.3-py2.6.egg', '/usr/local/lib/python2.6/dist-packages/simplejson-2.0.9-py2.6-linux-i686.egg', '/usr/local/lib/python2.6/site-packages', '/usr/local/lib/python2.6/site-packages/gtk-2.0', '/usr/local/lib/python2.6/dist-packages', '/usr/lib/python2.6/dist-packages', '/usr/lib/python2.6/dist-packages/Numeric', '/usr/lib/python2.6/dist-packages/PIL', '/usr/lib/python2.6/dist-packages/gst-0.10', '/var/lib/python-support/python2.6', '/usr/lib/python2.6/dist-packages/gtk-2.0', '/var/lib/python-support/python2.6/gtk-2.0', '/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode']
这看起来像是向前迈了一步，因为test_env路径中出现了一些东西，但它仍然无法正常工作。我认为我当前的问题是 '/home/jesse/.local/lib/python2.6/site-packages' 出现在 '/home/jesse/Desktop/test_env/lib/python2.6/site-packages 之前的路径中'
编辑 4： Roger 建议使用 --no-site-packages 选项创建环境。我试过了。同样的问题。
jesse@jesse-laptop:~/Desktop/test_env$ source bin/activate
(test_env)jesse@jesse-laptop:~/Desktop/test_env$ bin/python
Python 2.6.2 (release26-maint, Apr 19 2009, 01:56:41)
[GCC 4.3.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import foo_package
importing from normal env
>>> import sys
>>> sys.path
['', '/home/jesse/Desktop/test_env/lib/python2.6/site-packages/setuptools-0.6c9-py2.6.egg', '/home/jesse/Desktop/test_env/lib/python2.6', '/home/jesse/Desktop/test_env/lib/python2.6/plat-linux2', '/home/jesse/Desktop/test_env/lib/python2.6/lib-tk', '/home/jesse/Desktop/test_env/lib/python2.6/lib-old', '/home/jesse/Desktop/test_env/lib/python2.6/lib-dynload', '/usr/lib/python2.6', '/usr/lib/python2.6/plat-linux2', '/usr/lib/python2.6/lib-tk', '/home/jesse/.local/lib/python2.6/site-packages', '/home/jesse/Desktop/test_env/lib/python2.6/site-packages']
>>>
再次，看起来问题是我的“.local”中的站点包出现在路径中比“test_env”中的站点包更早。