title: Newbie : installing and upgrading python module
body: <p>I have downloaded and install a python library, via setup.py , python2.5 setup.py install ...</p>
  
  <p>now the version is changed at the source . a newer library is available. originally , i have clone it via mercurial, and install it. right now , i have updated repository. </p>
  
  <p>how do i use the newer version ? overwrite the installation ?</p>
  
  <p>by simply doing setup.py install again ?</p>