RE: [Quantlib-users] Observable Python objects

Posted by Andre Louw-2 on Nov 10, 2003; 9:07pm
URL: http://quantlib.414.s1.nabble.com/Observable-Python-objects-tp10448p10449.html

Luigi,

I probably did not express myself properly.

The Observer side works well (even using inheritance), the problem being
that Python objects can only observe QuantLib C++ objects (those defined as
type 'isObservable' in their SWIG interface files). I'm looking at the other
side where a Python object becomes observable by other Python objects.

Something in the line of

class Foo(Observable):
        def __init__(self):
                Observable.__init__(self)
        def changeMe(self):
                self.notifyObservers()

class FooObserver:
    def __init__(self):
        self.obs = QuantLib.Observer(self.update)
    def update(self):
        print "Happens when Foo changed"
    def registerWith(self,o):
        self.obs.registerWith(o)

f = Foo()
fo = FooObserver()
fo.registerWith(f)
f.changeMe() --> should result in an update in FooObserver...

Andre