title: Pass a parent class as an argument?
body: <p>Is it possible to leave a parent class unspecified until an instance is created?<br>
  e.g. something like this:</p>
  
  <pre><code>class SomeParentClass:
      # something
  
  class Child(unspecifiedParentClass):
      # something
  
  instance = Child(SomeParentClass)
  </code></pre>
  
  <p>This obviously does not work.  But is it possible to do this somehow?</p>