title: Need to change source code of an installed library
body: <p>I am using Python3.4. I have installed a certain "itunespy" library from GitHub with pip, to work with iTunes API.<br>
  (<a href="https://github.com/spaceisstrange/itunespy" rel="nofollow">https://github.com/spaceisstrange/itunespy</a>)</p>
  
  <p>I can now access it from console by</p>
  
  <pre><code>import itunespy
  </code></pre>
  
  <p>Except the library is only searching the US store through iTunes Api, whereas I need to access the UK store. I looked into the code and found I only need to change two lines to fix my problem. </p>
  
  <p>Please can you tell me how I can access and change the source code of an already installed library.</p>
  
  <p>Thank you.</p>