title: Temporary PYTHONPATH in Windows
body: <p>How do I set, temporarily, the PYTHONPATH environment variable just before executing a Python script?</p>
  
  <p>In *nix, I can do this:</p>
  
  <pre><code>$ PYTHONPATH='.' python scripts/doit.py
  </code></pre>
  
  <p>In Windows, this syntax does not work, of course. What is the equivalent, though?</p>