title: How to stop thread freezing when opening programs in python
body: <p>I have a simple program, part of which is to open other programs, for example a web browser. </p>
  
  <p>It does this fine with <code>os.system(sudo "program")</code> but once the program is open I can't do anything with the original python program until the new one closes. Is there any way I could stop this from happening?</p>