我一直试图在我的OS X机器上运行Python 3.3的内置“venv”模块.我使用Homebrew安装了Python 3.3.
根据文档,创建和切换虚拟环境的工作方式与您期望的一样：
$python3 -m venv myvenv
$source myvenv/bin/activate
我测试过这样的东西：
$echo "YEAH = 'YEAH!'" > myvenv/lib/python3.3/site-packages/thingy.py
$python
>>> import thingy
>>> print(thingy.YEAH)
'YEAH!'
但是当我尝试安装分发时,它根本就不会进入正确的位置.出于某种原因,它坚持尝试安装到/usr/local/lib/python3.3/site-packages/,它失败并显示以下消息：
No setuptools distribution found
running install
Checking .pth file support in /usr/local/lib/python3.3/site-packages/
/Users/victor/myvenv/bin/python -E -c pass
TEST Failed: /usr/local/lib/python3.3/site-packages/ does NOT support .pth files
error: bad install directory or PYTHONPATH
You are attempting to install a package to a directory that is not
on PYTHONPATH and which Python does not read ".pth" files from. The
installation directory you specified (via --install-dir,--prefix,or
the distutils default setting) was:
/usr/local/lib/python3.3/site-packages/
and your PYTHONPATH environment variable currently contains:
''
无论我是尝试使用distribute_setup.py安装还是直接使用源代码分发,都会发生这种情况.我甚至尝试使用–prefix = / Users / victor / myenv,但它仍然试图将所有内容都放在我的“全局”网站包中.
我无法弄清楚为什么会发生这种情况,但它在我的两台机器上都是一致的.请注意,sys.prefix报告正确的路径(虚拟环境).
这是Homebrew的问题吗？ OS X？ Python 3.3？ VENV？我？
最佳答案
这是Homebrew的一个问题,是的,但它现在自https://github.com/mxcl/homebrew/commit/0b50110107ea2998e65011ec31ce45931b446dab起正在运行.
$brew update
$brew rm python3 #if you have installed it before
$brew install python3
$cd /tmp
$which python3
/usr/local/bin/python3
$python3 -m venv myvenv
$source myvenv/bin/activate
$wget http://python-distribute.org/distribute_setup.py # may need brew install wget
$python3 distribute_setup.py
...
Finished processing dependencies for distribute==0.6.45
After install bootstrap.
Creating /private/tmp/myvenv/lib/python3.3/site-packages/setuptools-0.6c11-py3.3.egg-info
Creating /private/tmp/myvenv/lib/python3.3/site-packages/setuptools.pth
您看到将安装成功分发到/ tmp目录中.