> I wander how to setup the enumeration type > and constant in Python,
These concepts do not exist in Python per se. The convention is to make constant names uppercase: PI = 3.1415926 Enums are a little more variable in implementation depending on what you want to do with them. If you need to iterate over them a tuple might be a choice with strings as values. But if you need to use them as indices into a list a dictionary might be better.(But you could use them as keys into a dictionary instead of course!) Other more sophisticated options include creating classes. These can implement restricted ranges etc In practice I rarely find I need enums in Python because the wealth of data types (lists, tupoles, sets, dictionaries, classes) means I rarely need and extra symbolic values. I usually find myself using enums in other languages because I don't have quite the right data type available and an enum helps fake it. HTH, Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor