Question

我设置的任何虚拟环境的sys.path都发生了奇怪和意外的事情。例如，一个干净的环境：

$ virtualenv test
$ source test/bin/activate
(test) $

这是预期的PYTHONPATH：

(test) $ python
>>> import sys
>>> print '\n'.join(sys.path)

/home/user/test/local/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg
/home/user/test/local/lib/python2.7/site-packages/pip-1.1-py2.7.egg
/home/user/test/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg
/home/user/test/lib/python2.7/site-packages/pip-1.1-py2.7.egg
/home/user/test/lib/python2.7
/home/user/test/lib/python2.7/plat-linux2
/home/user/test/lib/python2.7/lib-tk
/home/user/test/lib/python2.7/lib-old
/home/user/test/lib/python2.7/lib-dynload
/usr/lib/python2.7
/usr/lib/python2.7/plat-linux2
/usr/lib/python2.7/lib-tk
/home/user/test/local/lib/python2.7/site-packages
/home/user/test/lib/python2.7/site-packages

但这是我真正得到的：

(test) $ bpython
>>> import sys
>>> print '\n'.join(sys.path)

/usr/bin
/usr/lib/python2.7
/usr/lib/python2.7/plat-linux2
/usr/lib/python2.7/lib-tk
/usr/lib/python2.7/lib-old
/usr/lib/python2.7/lib-dynload
/usr/local/lib/python2.7/dist-packages
/usr/lib/python2.7/dist-packages

我无法弄清楚两个不同的sys.paths的原因。因此，没有pip安装工作！我正在使用Virtualenv 1.7.2，Ubuntu 12.04，Python 2.7.3。任何帮助将不胜感激。

Answer 1

我没有为每个virtualenv安装一个bpython副本，而是将此函数添加到我的shell配置文件中（例如~/.bashrc或~/.zshrc）。它用一些逻辑包装bpython命令来加载虚拟环境的python路径（如果你有一个活动的虚拟环境）。

bpython() {
    if test -n "$VIRTUAL_ENV"
    then
        PYTHONPATH="$(python -c 'import sys; print ":".join(sys.path)')" \
        command bpython "$@"
    else
        command bpython "$@"
    fi
}

Answer 2

我发现在安装bpython后我需要停用并重新激活我的virtualenv才能工作。

pip install bpython
deactivate
. bin/activate＃或您的等效激活命令

Answer 3

我的假设是你在激活新的virtualenv后没有安装bpython。

我按照你提到的那样跟进了它：

mkvirtualenv bpython
(bpython)~ $ pip install bpython
(bpython)~ $bpython

然后运行命令：

>>> import sys
>>> print '\n'.join(sys.path)

/Users/xxxx/.virtualenvs/bpython/bin
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/site-packages/pip-1.1-py2.7.egg
/Users/xxxx/.virtualenvs/bpython/lib/python27.zip
/Users/xxxx/.virtualenvs/bpython/lib/python2.7
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/plat-darwin
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/plat-mac
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/plat-mac/lib-scriptpackages
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/lib-tk
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/lib-old
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/lib-dynload
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/site-packages

并通过在激活的virtualenv

下运行python再次做同样的事情

(bpython)~ $ python
.....
>>> import sys
>>> print '\n'.join(sys.path)

/Users/xxxx/.virtualenvs/bpython/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/site-packages/pip-1.1-py2.7.egg
/Users/xxxx/.virtualenvs/bpython/lib/python27.zip
/Users/xxxx/.virtualenvs/bpython/lib/python2.7
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/plat-darwin
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/plat-mac
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/plat-mac/lib-scriptpackages
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/lib-tk
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/lib-old
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/lib-dynload
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages
/Users/xxxx/.virtualenvs/bpython/lib/python2.7/site-packages

我发现两个结果没有区别

Answer 4

我还发现，如果您在本地安装了bpython，则需要使用--no-site-packages创建virtualenv才能正常工作。如果您创建了不带该标志的virtualenv，则可以在no-global-site-packages.txt中创建一个名为~/.virtualenvs/<env-name>/lib/python2.7/的空文件，如this Stack Exchange answer中所述。

python和bpython在Virtualenv中使用不同的PYTHONPATH

4 个答案: