Demonstrates get and set methods and properties : property « Class « Python Tutorial

class MyClass(object):
    def __init__(self, name):

        self.__name = name

    def get_name(self):
        return self.__name

    def set_name(self, new_name):
        if new_name == "":
            print "A MyClass's name can't be the empty string."
        else:
            self.__name = new_name
            print "Name change successful."

    name = property(get_name, set_name)

    def talk(self):
        print "\nHi, I'm", self.name

crit = MyClass("Poochie")
crit.talk()

print crit.name
crit.name = ""
crit.name = "A"

crit.talk()

11.3.property
	11.3.1.	The property Function
	11.3.2.	Objects in the class namespace can be accessed directly using the module name and dot . syntax.
	11.3.3.	An example of using a class data attribute (foo):
	11.3.4.	Demonstrates get and set methods and properties
	11.3.5.	Python properties (or attributes) are dynamic.
	11.3.6.	Define and access Properties