title: Problems with umlauts in python appdata environvent variable
body: <p>I can't find a correct way to get the environment variable for the appdata path in python.</p>
  
  <p>The problem is that my user name includes special characters (the german ae and ue).
  I made a workaround wit PyQt for Vista and Windows 7 but it doesn't work for XP Systems.</p>
  
  <p>Does anybody know the correct encoding of these environment variables or another solution for this problem?</p>