擅长:python、mysql、java
<p><a href="https://virtualenv.pypa.io/en/stable/" rel="nofollow noreferrer">virtualenv</a>是避免Python库版本控制问题的常用方法。在</p>
<p>根据文件:</p>
<blockquote>
<p>virtualenv is a tool to create isolated Python environments.</p>
<p>The basic problem being addressed is one of dependencies and versions, and indirectly permissions. Imagine you have an application that needs version 1 of LibFoo, but another application requires version 2. How can you use both these applications? If you install everything into /usr/lib/python2.7/site-packages (or whatever your platform’s standard location is), it’s easy to end up in a situation where you unintentionally upgrade an application that shouldn’t be upgraded.</p>
<p>Or more generally, what if you want to install an application and leave it be? If an application works, any change in its libraries or the versions of those libraries can break the application.</p>
</blockquote>