Class binder

test/mitmproxy/test_optmanager.py:183–190

    assert len(o._subscriptions) == 0

    class binder:
        def __init__(self):
            self.o = TO()
            self.called = False
            self.o.subscribe(self.bound, ["two"])

        def bound(self, *args, **kwargs):
            self.called = True

    t = binder()
    t.o.one = 3