如何复制virtualenv [英] How to duplicate virtualenv

问题描述

我有一个现成的virtualenv，其中包含很多软件包，但是旧版本的Django。

I have an existing virtualenv with a lot of packages but an old version of Django.

我想做的是重复环境，所以我有另一个环境，它们的软件包完全相同，但 是Django的较新版本。我该怎么做？

What I want to do is duplicate this environment so I have another environment with the exact same packages but a newer version of Django. How can I do this?

推荐答案

最简单的方法是使用pip生成需求文件。需求文件基本上是一个文件，其中包含要安装（或在pip生成文件的情况下已经安装）所有python软件包的列表，以及它们的版本。

The easiest way is to use pip to generate a requirements file. A requirements file is basically a file that contains a list of all the python packages you want to install (or have already installed in case of file generated by pip), and what versions they're at.

要生成需求文件，请进入原始的virtualenv，然后运行：

To generate a requirements file, go into your original virtualenv, and run:

pip freeze > requirements.txt

这将为您生成 requirements.txt 文件。如果在您喜欢的文本编辑器中打开该文件，则会看到类似以下内容的文件：

This will generate the requirements.txt file for you. If you open that file up in your favorite text editor, you'll see something like:

Django==1.3
Fabric==1.0.1
etc...

现在，编辑该行，说 Django == xx 说 Django == 1.3 （或要在新的virtualenv中安装的任何版本） 。

Now, edit the line that says Django==x.x to say Django==1.3 (or whatever version you want to install in your new virtualenv).

最后，激活您的新虚拟环境，然后运行：

Lastly, activate your new virtualenv, and run:

pip install -r requirements.txt

pip将自动下载并安装您指定的任何版本的 requirements.txt 文件中列出的所有python模块！

And pip will automatically download and install all the python modules listed in your requirements.txt file, at whatever versions you specified!

这篇关于如何复制virtualenv的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！