class Person:
def setName(self, name):
self.name = name
def getName(self):
return self.name
def greet(self):
print "Hello, world! I'm %s." % self.name
foo = Person()
bar = Person()
foo.setName('A')
bar.setName('B')
foo.greet()
bar.greet()
print foo.name
bar.greet()