title: What's an example use case for a Python classmethod?
body: <p>I've read <a href="https://stackoverflow.com/questions/38238/what-are-class-methods-in-python-for">What are Class methods in Python for?</a> but the examples in that post are complex.  I am looking for a clear, simple, bare-bones example of a particular use case for classmethods in Python.  </p>
  
  <p>Can you name a small, specific example use case where a Python classmethod would be the right tool for the job?</p>