class Foo(object):
	def __init__(self):
		self._value = "Bar"

def get_value(self):
	return self._value
	
def set_value(self, val):
	self._value = val
	
def del_value(self):
	del self._value
	
Foo.value = property(get_value, set_value, del_value)
f = Foo()

print f.value
f.value = "Foo"
print f.value