title: Install a Python package into a different directory using pip?
body: <p>I know the obvious answer is to use virtualenv and virtualenvwrapper, but for various reasons I can't/don't want to do that.</p>
  
  <p>So how do I modify the command</p>
  
  <pre><code>pip install package_name
  </code></pre>
  
  <p>to make <code>pip</code> install the package somewhere other than the default <code>site-packages</code>?</p>