如何从python中激活pyvenv vitrualenv? (activate_this.py已删除?) [英] How can I activate a pyvenv vitrualenv from within python? (activate_this.py was removed?)

问题描述

我正在使用Python 3.4，并且已经创建了pyvenv，我希望从python进程中激活它.在virtualenv中，我曾经使用activate_this.py，但是在pyvenv中似乎消失了.

I'm using Python 3.4, and having created a pyvenv, I'm looking to activate it from within a python process. With virtualenv, I used to use activate_this.py, but that appears to be gone in pyvenv.

现在是否有一种简单的方法可以有效地将当前的解释器更改为virtualenv解释器?我可能会弄乱PATH(activate_this.py所做的事情)，但我想使用一种更简单，更稳定的方法.

Is there now an easy way to effectively change the current interpreter to the virtualenv interpreter? I could probably mess around with the PATH (which is what activate_this.py did), but I'd like a simpler and stabler way.

这是在wsgi.py中使用的.

This is for use in a wsgi.py.

推荐答案

pyvenv和venv模块不支持此功能.第三方virtualenv软件包支持使用activate_this.py ，但该功能未包含在内置venv模块中

pyvenv and the venv module don't support this out of the box. The third party virtualenv package does support this using activate_this.py, but that feature was not included in the built-in venv module.

您可以尝试从基于virtualenv的环境借用activate_this.py的副本；似乎可行，尽管我不能发誓它会是完美的(venv/pyvenv在启动过程中使用了一些魔术；尚不清楚是否所有这些都是通过activate_this.py复制的.)

You could try to borrow a copy of activate_this.py from a virtualenv based environment; it seems to work, though I can't swear it will be perfect (venv/pyvenv uses some magic during startup; unclear if all of it is replicated via activate_this.py).

针对它的virtualenv文档在Python 3中已过时(他们声称您使用的是execfile，但不存在).与Python 3兼容的替代方案是:

The virtualenv docs for it are out of date for Python 3 (they claim you use execfile, which doesn't exist). The Python 3 compatible alternative would be:

activator = 'some/path/to/activate_this.py'  # Looted from virtualenv; should not require modification, since it's defined relatively
with open(activator) as f:
    exec(f.read(), {'__file__': activator})

activate_this.py所做的任何事情都不是神奇的事情，因此您可以手动执行相同的更改而不会从virtualenv中抢劫(调整PATH，sys.path，sys.prefix等)，但是借用使操作变得更加简单这种情况.

Nothing activate_this.py does is magical, so you could manually perform the same changes without looting from virtualenv (adjusting PATH, sys.path, sys.prefix, etc.), but borrowing makes it much simpler in this case.

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