PomdpX Reader Class

The type DD of parameter tag yet to be added
If I use  " if var.find('NumValues'): " I get the following warning
FutureWarning: The behavior of this method will change in future versions. Use specific 'len(elem)' or 'elem is not None' test instead.
I cannot use len() for a Nonetype object so this is the only way I can ensure the object to be not None.