Is there python code in the Python standard library that uses variable names that shadow builtins?
<p>[<strong>Excluding any test code that just mocks a builtin</strong>]</p>

<p>Given that many builtins have been added over time, if there are multiple occurrences, I'd accept an answer showing a module or some code that was created <em>after</em> that builtin existed.</p>

<p>My rationale for asking is that after posting a <a href="http://mail.python.org/pipermail/python-list/2011-August/1278554.html" rel="nofollow">question</a> on the python mailing list, some of the responses indicated that there are members of the Python community that think its 
perfectly reasonable to use variable names that shadow builtins when any other name would work just as well.</p>

<p>I'd like to use the standard library as a gauge to how common this practice is among the various Python developers.</p>
