I am writing some code to form a tree of nodes of different types. The idea is to define one class per node type such as
class node_type_1(node): <specific properties by name including other node types> class node_type_2(node): <specific properties by name including other node types> etc (Class "node" would hold any common properties). When walking the tree I need to know what type of node I'm dealing with so polymorphism isn't generally useful. The action to be taken depends on the node type. Two options appear to be useful: __class__ and isinstance. I know the latter will match the instance against any superclass and the former will match one class only. My question is: is this the Pythonic way to deal with such a tree? Is there a better way? In C I would use structs where one field was a tag indicating the kind of struct. James -- http://mail.python.org/mailman/listinfo/python-list
