I have read previous posts about it, but those don't seem to be working now. I tried
sudo apt-get install python-wxversion python-wxglade
and then
svn checkout
http://google-appengine-wx-launcher.googlecode.com/svn/trunk/
google-appengine-launcher
But got an error
svn: E160013: Unable to connect to a repository at URL 'http://google-appengine-wx-launcher.googlecode.com/svn/trunk/google-appengine-wx-launcher-read-only'
svn: E160013: '/svn/trunk/google-appengine-wx-launcher-read-only' path not found
Please help me with it.