`sys.dont_write_bytecode` is True, but .pyc files are still generated
<p>I'm setting the <strong><em>PYHTONDONTWRITEBYTECODE</em></strong> environment variable to avoid .pyc files, and  I have checked that <code>sys.dont_write_bytecode</code> is True.</p>

<p>But .pyc files are still generated everywhere.</p>

<p>PS: I'm using Python 2.6.6</p>

<p><strong>The reason is that my script is running under <code>env -i</code>.</strong></p>
