title: How to install python package in a specific directory
body: <p>I'm developing a twitter app on google appengine - for that I want to use the Twython library. I tried installing it using pip - but it either installs it in the main python dir, or doesn't import all dependencies.</p>
  
  <p>I can simply copy all the files of Twython to the appengine root dir, and also import manually all the dependency libraries, but that seems awfully wrong. How do I install a package in a specific folder including all it's dependencies?</p>
  
  <p>Thanks</p>