title: Runtime Error with copy.deepcopy in Python
body: <p>I need to manipulate a large list of objects. Now, I need to invoke <code>copy.deepcopy</code> and it raises a <code>RunTimeError: maximum recursion depth exceeded</code> (Its OK when I try it with a smaller list.). My question is: Is there any other way to get the feature of <code>copy.deepcopy</code> which does not have this problem? Regards.</p>