# Copyright (c) 2007, Enthought, Inc. # License: BSD Style. # minimal.py --- Minimal example of using traits. #--[Imports]-------------------------------------------------------------------- from traits.api import HasTraits, Float, TraitError #--[Code]----------------------------------------------------------------------- class Person(HasTraits): weight = Float(150.0) #--[Example*]------------------------------------------------------------------- # instantiate the class joe = Person() # Show the default value print joe.weight # Assign new values joe.weight = 161.9 # OK to assign a float print joe.weight joe.weight = 162 # OK to assign an int print joe.weight # The following line causes a traceback: try: joe.weight = 'average' # Error to assign a string print "You should not see this message." except TraitError: print "You can't assign a string to the 'weight' trait."