dict changing size in iteration

[jasongrout]

@SylvainCorlay, it looks like this might be from some of the recent traitlet changes?

jupyter/jupyter_notebook/jupyter_notebook/widgets/widget_int.pyc in __init__(self, *pargs, **kwargs)
     35     def __init__(self, *pargs, **kwargs):
     36         """Constructor"""
---> 37         super(_BoundedInt, self).__init__(*pargs, **kwargs)
     38 
     39     def _value_validate(self, value, trait):

jupyter/jupyter_notebook/jupyter_notebook/widgets/widget_int.pyc in __init__(self, value, **kwargs)
     23         if value is not None:
     24             kwargs['value'] = value
---> 25         super(_Int, self).__init__(**kwargs)
     26 
     27 

jupyter/jupyter_notebook/jupyter_notebook/widgets/widget.pyc in __init__(self, *pargs, **kwargs)
    505 
    506     def __init__(self, *pargs, **kwargs):
--> 507         super(DOMWidget, self).__init__(*pargs, **kwargs)
    508 
    509         def _validate_border(name, old, new):

jupyter/jupyter_notebook/jupyter_notebook/widgets/widget.pyc in __init__(self, **kwargs)
    170         """Public constructor"""
    171         self._model_id = kwargs.pop('model_id', None)
--> 172         super(Widget, self).__init__(**kwargs)
    173 
    174         Widget._call_widget_constructed(self)

jupyter/traitlets/traitlets/config/configurable.pyc in __init__(self, **kwargs)
     72 
     73         # load kwarg traits, other than config
---> 74         super(Configurable, self).__init__(**kwargs)
     75 
     76         # load config

jupyter/traitlets/traitlets/traitlets.pyc in __init__(self, *args, **kw)
    582         with self.hold_trait_notifications():
    583             for key, value in iteritems(kw):
--> 584                 setattr(self, key, value)
    585 
    586     @contextlib.contextmanager

contextlib.pyc in __exit__(self, type, value, traceback)
     22         if type is None:
     23             try:
---> 24                 self.gen.next()
     25             except StopIteration:
     26                 return

jupyter/traitlets/traitlets/traitlets.pyc in hold_trait_notifications(self)
    614                 self._cross_validation_lock = True
    615                 yield
--> 616                 for name in cache:
    617                     if hasattr(self, '_%s_validate' % name):
    618                         cross_validate = getattr(self, '_%s_validate' % name)

RuntimeError: dictionary changed size during iteration

[minrk]

Is this fixed by #3?

[SylvainCorlay]

It should be fixed with this PR yes.

[minrk]

Perfect, thanks!