title: How to clear os.environ value for only one variable in Python
body: <p>I'm setting <code>os.environ['PYTHONHOME']=&quot;/home/user/OpenPrint/py2.6&quot;</code> in my Python script</p>
  <p>But at the end of the script I need to clear this variable so that I can call another python script from a different location. Can someone tell me how to do that? I tried <code>os.environ.clear()</code> but that clears all the other variables too.</p>