---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-28-c5961354eefb> in <module>()
----> 1 v = ipyvolume.Volume(opacity2=0.1, opacity3=0)
/Users/maartenbreddels/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py in __new__(cls, *args, **kwargs)
954 else:
955 inst = new_meth(cls, *args, **kwargs)
--> 956 inst.setup_instance(*args, **kwargs)
957 return inst
958
/Users/maartenbreddels/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py in setup_instance(self, *args, **kwargs)
982 self._trait_notifiers = {}
983 self._trait_validators = {}
--> 984 super(HasTraits, self).setup_instance(*args, **kwargs)
985
986 def __init__(self, *args, **kwargs):
/Users/maartenbreddels/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py in setup_instance(self, *args, **kwargs)
973 else:
974 if isinstance(value, BaseDescriptor):
--> 975 value.instance_init(self)
976
977
/Users/maartenbreddels/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py in instance_init(self, obj)
1694 def instance_init(self, obj):
1695 self._resolve_classes()
-> 1696 super(Instance, self).instance_init(obj)
1697
1698 def _resolve_classes(self):
/Users/maartenbreddels/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py in instance_init(self, obj)
516 # use provides a static default, transfer that to obj._trait_values.
517 with obj.cross_validation_lock:
--> 518 if (self._dynamic_default_callable(obj) is None) \
519 and (self.default_value is not Undefined):
520 v = self._validate(obj, self.default_value)
/Users/maartenbreddels/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py in _dynamic_default_callable(self, obj)
499 mro = type(obj).mro()
500 meth_name = '_%s_default' % self.name
--> 501 for cls in mro[:mro.index(self.this_class) + 1]:
502 if hasattr(cls, '_trait_default_generators'):
503 default_handler = cls._trait_default_generators.get(self.name)
ValueError: <class 'ipywidgets.widgets.widget.Widget'> is not in list