nucleic/enaml — pull request #82 by sccolbert (2013-11-10 16:14:42+00:00)
Title: fix the potential for unsafe code when running under pyqt

This demonstrates the danger of not have weakref'able object slots:

```python
In [1]: from PyQt4.QtCore import *

In [2]: class Foo(object):
...: __slots__ = ()
...: def foo(self):
...: print 'fired'
...: def __del__(self):
...: print 'collected'
...:

In [3]: class Bar(QObject):
...: triggered = pyqtSignal()
...:

In [4]: f = Foo()

In [5]: b = Bar()

In [6]: b.triggered.connect(f.foo)

In [7]: b.triggered.emit()
fired

In [8]: del f
collected

In [9]: b.triggered.emit()
fired
```