Traits_CStr_error.py

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
<ipython-input-1-bcff7cee2750> in <module>()
      1 get_ipython().run_line_magic('matplotlib', 'notebook')
      2 import hyperspy.api as hs
----> 3 hs.preferences.gui()

c:\users\me\documents\github\hyperspy\hyperspy\ui_registry.py in pg(self, display, toolkit, **kwargs)
    172     def pg(self, display=True, toolkit=None, **kwargs):
    173         return get_gui(self, toolkey=toolkey, display=display,
--> 174                        toolkit=toolkit, **kwargs)
    175     return pg
    176 

c:\users\me\documents\github\hyperspy\hyperspy\ui_registry.py in get_gui(self, toolkey, display, toolkit, **kwargs)
    152         if toolkit in toolkits:
    153             used_toolkits.add(toolkit)
--> 154             thisw = f(obj=self, display=display, **kwargs)
    155             if not display:
    156                 widgets[toolkit] = thisw

C:\ProgramData\Anaconda3\envs\py\lib\site-packages\hyperspy_gui_ipywidgets\utils.py in wrapper(*args, **kwargs)
     69     def wrapper(*args, **kwargs):
     70         display = kwargs.pop("display", True)
---> 71         wdict = f(*args, **kwargs)
     72         if display:
     73             IPython.display.display(wdict["widget"])

C:\ProgramData\Anaconda3\envs\py\lib\site-packages\hyperspy_gui_ipywidgets\preferences.py in show_preferences_widget(obj, **kwargs)
     63         for trait_name in getattr(obj, tab).editable_traits():
     64             trait = tabtraits[trait_name]
---> 65             widget = TRAITS2IPYWIDGETS[type(trait.trait_type)](
     66                 trait, get_label(trait, trait_name))
     67             ipytab.append(widget)

KeyError: <class 'traits.trait_types.CStr'>