class Example:
    completed = False
    def is_completed(self):
        if self.completed is False:
            return 'Not completed'
        else:
            return 'Completed'
    def completed(self):
        self.completed = True
    def status(self):
        return self.completed
example = Example()
print "Request 1: %s " % example.completed
example.completed()
print "Request 2: %s " % example.completed
print "Request 3: %s " % example.is_completed()

Request 1: <bound method Example.completed of <__main__.Example instance at 0x7f64e5f82248>> 
Request 2: True 
Request 3: Completed 

class completed_class():
  def __call__(self, *args, **kwargs):
    print args, kwargs
    return "call"
  def __repr__(self):
    return "repr"
  def __str__(self):
    return "str"

class A(object):
    x = 123
    @property
    def x(self):
        return 1234
a = A()
print a.x