classifier error happens in hb9_project

[mlovci]

ValueError: [] cannot be transformed to a Widget

[olgabot]

can you give the full call and traceback?

[mlovci]

sc_study.interactive_classifier()
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-10-28efd125c982> in <module>()
----> 1 sc_study.interactive_classifier()

/Users/lovci/Projects/flotilla/flotilla/_schooner_data_model/_Study.pyc in interactive_classifier(self)
    420                                        not i.startswith("~")],
    421                  feature_score_std_cutoff=(0.1, 20),
--> 422                  draw_labels=False,
    423         )
    424 

/Users/lovci/venv/lib/python2.7/site-packages/IPython/html/widgets/interaction.pyc in interact(__interact_f, **kwargs)
    234         #        ...
    235         f = __interact_f
--> 236         w = interactive(f, **kwargs)
    237         f.widget = w
    238         display(w)

/Users/lovci/venv/lib/python2.7/site-packages/IPython/html/widgets/interaction.pyc in interactive(__interact_f, **kwargs)
    189     getcallargs(f, **{n:v for n,v,_ in new_kwargs})
    190     # Now build the widgets from the abbreviations.
--> 191     kwargs_widgets.extend(_widgets_from_abbreviations(new_kwargs))
    192 
    193     # This has to be done as an assignment, not using container.children.append,

/Users/lovci/venv/lib/python2.7/site-packages/IPython/html/widgets/interaction.pyc in _widgets_from_abbreviations(seq)
    166     result = []
    167     for name, abbrev, default in seq:
--> 168         widget = _widget_from_abbrev(abbrev, default)
    169         if not widget.description:
    170             widget.description = name

/Users/lovci/venv/lib/python2.7/site-packages/IPython/html/widgets/interaction.pyc in _widget_from_abbrev(abbrev, default)
    126             pass
    127     if widget is None:
--> 128         raise ValueError("%r cannot be transformed to a Widget" % (abbrev,))
    129     return widget
    130 

ValueError: [] cannot be transformed to a Widget

EDIT: formatted to code