blocks|key|253899|text|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，其中包含您想要安装的所有python包(如果是pip生成的文件，则已经安装)的列表，以及它们的版本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|253900|要生成需求文件，请进入原始的virtualenv，然后运行：|253901|pip+freeze+>+requirements.txt|code-block|syntax|javascript|253902|这将为您生成requirements.txt文件。如果在您喜欢文本编辑器中打开该文件，您将看到类似以下内容：|253903|Django==1.3
Fabric==1.0.1
etc...|253904|现在，将显示Django==x.x的代码行编辑为Django==1.3+(或者您想要安装到新的virtualenv中的任何版本)。|offset|length|style|CODE|253905|最后，激活您的新+virtualenv，并运行：|BOLD|253906|pip+install+-r+requirements.txt|253907|pip将自动下载并安装requirements.txt文件中列出的所有python模块，无论您指定的是哪种版本！|253908|entityMap^0|0|0|0|0|0|6|B|O|B|0|7|1|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|12|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|13|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|14|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|15|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|16|8|@$O|17|P|18|Q|R]|$O|19|P|1A|Q|R]]|9|@]|A|$]]|$1|S|3|T|5|6|7|1B|8|@$O|1C|P|1D|Q|U]]|9|@]|A|$]]|$1|V|3|W|5|F|7|1E|8|@]|9|@]|A|$G|H]]|$1|X|3|Y|5|6|7|1F|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|10|$]]

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.

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

<pre><code>pip freeze &gt; requirements.txt
</code></pre>

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:

<pre><code>Django==1.3
Fabric==1.0.1
etc...
</code></pre>

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

Lastly, activate your new virtualenv, and run:

<pre><code>pip install -r requirements.txt
</code></pre>

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

blocks|key|3152257|text|另一种选择是使用virtualenv-clone包：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3152258|3152259|用于克隆不可重定位的虚拟环境的脚本non。|blockquote|3152260|3152261|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/edwardgeorge/virtualenv-clone^0|8|G|8|G|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|Z|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|10|8|@]|D|@]|E|$]]|$1|K|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

Another option is to use <a href="https://github.com/edwardgeorge/virtualenv-clone"><code>virtualenv-clone</code></a> package:

<blockquote>
 A script for cloning a non-relocatable virtualenv.
</blockquote>

blocks|key|252309|text|virtualenvwrapper提供了一个command+to+duplicate+virtualenv|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|252310|cpvirtualenv+ENVNAME+[TARGETENVNAME]|code-block|syntax|javascript|252311|entityMap|0|LINK|mutability|MUTABLE|url|https://virtualenvwrapper.readthedocs.io/en/latest/command_ref.html#cpvirtualenv^0|0|H|M|V|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

<code>virtualenvwrapper</code> provides a <a href="https://virtualenvwrapper.readthedocs.io/en/latest/command_ref.html#cpvirtualenv" rel="noreferrer">command to duplicate virtualenv</a>

<pre><code>cpvirtualenv ENVNAME [TARGETENVNAME]
</code></pre>

blocks|key|256249|text|如果你使用的是Anaconda，你可以直接运行：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|256250|conda+create+--name+myclone+--clone+myenv|code-block|syntax|javascript|256251|这会将myenv复制到新创建的名为myclone的环境。|style|CODE|256252|entityMap|0|LINK|mutability|MUTABLE|url|https://conda.io/docs/user-guide/tasks/manage-environments.html^0|7|8|0|0|0|3|5|H|7|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@$A|10|B|11|K|L]|$A|12|B|13|K|L]]|9|@]|C|$]]|$1|M|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

If you are using <a href="https://conda.io/docs/user-guide/tasks/manage-environments.html" rel="noreferrer">Anaconda</a> you can just run:

<pre><code>conda create --name myclone --clone myenv
</code></pre>

This will copy <code>myenv</code> to the newly created environment called <code>myclone</code>.

blocks|key|3152344|text|最简单的选择是使用virtualenv-clone包。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3152345|要将venv1复制到venv2，请执行以下步骤：|3152346|3152347|在venv1或虚拟虚拟环境venv_dummy中安装virtualenv-clone。要创建venv_dummy：|ordered-list-item|3152348|3152349|python+-m+virtualenv+venv_dummy源venv_dummy/bin/activate|3152350|To+install+virtualenv-clone：|unordered-list-item|3152351|3152352|(venv_dummy)：pip+install+virtualenv-clone|3152353|To+duplicate+venv1+to+venv2：|3152354|3152355|(venv_dummy)：virtualenv-clone+venv1/+venv2/|3152356|entityMap|0|LINK|mutability|MUTABLE|url|https://pypi.org/project/virtualenv-clone/^0|9|G|9|G|0|0|2|5|A|5|0|0|1|5|D|A|Q|G|1A|A|0|0|0|B|G|0|0|0|D|5|M|5|0|0|0^^$0|@$1|2|3|4|5|6|7|17|8|@$9|18|A|19|B|C]]|D|@$9|1A|A|1B|1|1C]]|E|$]]|$1|F|3|G|5|6|7|1D|8|@$9|1E|A|1F|B|C]|$9|1G|A|1H|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|1I|8|@]|D|@]|E|$]]|$1|I|3|J|5|K|7|1J|8|@$9|1K|A|1L|B|C]|$9|1M|A|1N|B|C]|$9|1O|A|1P|B|C]|$9|1Q|A|1R|B|C]]|D|@]|E|$]]|$1|L|3|-4|5|6|7|1S|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|1T|8|@]|D|@]|E|$]]|$1|O|3|P|5|Q|7|1U|8|@$9|1V|A|1W|B|C]]|D|@]|E|$]]|$1|R|3|-4|5|6|7|1X|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|1Y|8|@]|D|@]|E|$]]|$1|U|3|V|5|Q|7|1Z|8|@$9|20|A|21|B|C]|$9|22|A|23|B|C]]|D|@]|E|$]]|$1|W|3|-4|5|6|7|24|8|@]|D|@]|E|$]]|$1|X|3|Y|5|6|7|25|8|@]|D|@]|E|$]]|$1|Z|3|-4|5|6|7|26|8|@]|D|@]|E|$]]]|10|$11|$5|12|13|14|E|$15|16]]]]

Easiest option is using <a href="https://pypi.org/project/virtualenv-clone/" rel="noreferrer"><code>virtualenv-clone</code></a> package.

To duplicate <code>venv1</code> to <code>venv2</code>, follow these steps:

<ol>
<li>Install <code>virtualenv-clone</code> in either <code>venv1</code> or a dummy virtual environment <code>venv_dummy</code>. To create <code>venv_dummy</code>:

<pre><code>python -m virtualenv venv_dummy
source venv_dummy/bin/activate
</code></pre></li>
<li>To install <code>virtualenv-clone</code>:

<pre><code>(venv_dummy): pip install virtualenv-clone
</code></pre></li>
<li>To duplicate <code>venv1</code> to <code>venv2</code>:

<pre><code>(venv_dummy): virtualenv-clone venv1/ venv2/
</code></pre></li>
</ol>

blocks|key|3152369|text|以防您使用pip+"venv“。我复制粘贴了保存虚拟环境的文件夹，并手动更改了复制文件夹的bin文件夹中的文件。我不知道它是否有效，但它是有效的！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3152370|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In case you use pip &quot;venv&quot;. I copy pasted the folder holding the virtual environment and manually changed the files in the bin folder of the copied folder.
I don't know if its efficient,but it works!

blocks|key|2937924|text|下面是我用于克隆python虚拟环境的go+to命令。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2937925|packs=`source-path/bin/pip+freeze`+&&+python3+-m+venv+<env-name>+&&+target-path/bin/pip+install+$packs|code-block|syntax|javascript|2937926|上述命令中使用的约定：|2937927|源路径-|2937928|=要克隆的环境的路径例如/home/john/envs/oldenv.|unordered-list-item|offset|length|style|CODE|2937929|env-name+=克隆环境的名称例如myenv，它也可以是路径例如/home/john/envs/myenv|2937930|target-path+=新克隆环境的路径例如/home/john/envs/<env-name>|2937931|2937932|使用它的优点或我更喜欢它的原因|2937933|2937934|无需生成requirements.txt文件。|ordered-list-item|2937935|克隆要执行的process.|2937936|single命令时，不会激活/停用任何环境(同时运行3个命令)。|2937937|2937938|2937939|在某些情况下，您可能希望在克隆环境时排除全局包。您可以使用source-path/bin/pip+freeze+--local替换source-path/bin/pip+freeze，有关--local+here的更多信息|2937940|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/54931275/pip-freeze-local/54931519^0|0|0|0|0|C|M|0|J|5|Y|L|0|N|Q|0|0|0|0|0|0|0|0|0|T|Y|1T|Q|2M|7|2U|4|0|0^^$0|@$1|2|3|4|5|6|7|1I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1J|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1K|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|1L|8|@]|9|@]|A|$]]|$1|K|3|L|5|M|7|1M|8|@$N|1N|O|1O|P|Q]]|9|@]|A|$]]|$1|R|3|S|5|M|7|1P|8|@$N|1Q|O|1R|P|Q]|$N|1S|O|1T|P|Q]]|9|@]|A|$]]|$1|T|3|U|5|M|7|1U|8|@$N|1V|O|1W|P|Q]]|9|@]|A|$]]|$1|V|3|-4|5|6|7|1X|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|Z|3|10|5|11|7|20|8|@]|9|@]|A|$]]|$1|12|3|13|5|11|7|21|8|@]|9|@]|A|$]]|$1|14|3|15|5|11|7|22|8|@]|9|@]|A|$]]|$1|16|3|-4|5|11|7|23|8|@]|9|@]|A|$]]|$1|17|3|-4|5|6|7|24|8|@]|9|@]|A|$]]|$1|18|3|19|5|6|7|25|8|@$N|26|O|27|P|Q]|$N|28|O|29|P|Q]|$N|2A|O|2B|P|Q]]|9|@$N|2C|O|2D|1|2E]]|A|$]]|$1|1A|3|-4|5|6|7|2F|8|@]|9|@]|A|$]]]|1B|$1C|$5|1D|1E|1F|A|$1G|1H]]]]

Here is my go to command for cloning python virtual environments.
<pre><code>packs=`source-path/bin/pip freeze` &amp;&amp; python3 -m venv &lt;env-name&gt; &amp;&amp; target-path/bin/pip install $packs
</code></pre>
Conventions used in above command:
<ul>
<li>source-path = path to env that you want to clone e.g. <code>/home/john/envs/oldenv</code>.</li>
<li>env-name = name of the cloned env e.g. <code>myenv</code>, it can be a path as well e.g.
<code>/home/john/envs/myenv</code></li>
<li>target-path = path to new cloned env e.g. <code>/home/john/envs/&lt;env-name&gt;</code></li>
</ul>
Advantages of using this or why i prefer this
<ol>
<li>No need to generate a requirements.txt file.</li>
<li>No environment is activated/deactivated during cloning process.</li>
<li>single command to be executed(3 commands ran at once).</li>
</ol>
In some cases you might want to exclude global packages from while cloning env you can replace <code>source-path/bin/pip freeze</code> with <code>source-path/bin/pip freeze --local</code>, more about <code>--local</code> <a href="https://stackoverflow.com/questions/54931275/pip-freeze-local/54931519">here</a>

blocks|key|3152234|text|你能不能简单地说：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3152235|3152236|将现有虚拟环境目录复制到新目录|unordered-list-item|3152237|更新到新的Django?|3152238|3152239|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|L|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|M|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|N|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|P|8|@]|9|@]|A|$]]]|J|$]]

Can you not simply:

<ul>
<li>Copy the existing virtual env directory to a new one</li>
<li>Update to the new Django?</li>
</ul>

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

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?

How to duplicate virtualenv

Django

我有一个现有的virtualenv，里面有很多包，但有一个旧版本的Django。我想做的是Django复制这个环境，这样我就有了另一个环境，其中包含完全相同的包，但是是一个更新版本的。我该怎么做呢？

问如何复制虚拟环境
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