WARNING:vispy:Traceback (most recent call last):


 "c:\Users\Volker\.vscode\extensions\ms-python.python-2019.9.34911\python
s\ptvsd_launcher.py", line 43, in <module>

main(ptvsdArgs)


 "c:\Users\Volker\.vscode\extensions\ms-python.python-2019.9.34911\python
s\lib\python\ptvsd\__main__.py", line 432, in main


run()


 "c:\Users\Volker\.vscode\extensions\ms-python.python-2019.9.34911\python
s\lib\python\ptvsd\__main__.py", line 316, in run_file 

runpy.run_path(target, run_name='__main__')


 "C:\Users\Volker\Anaconda3\envs\napari_new\lib\runpy.py", line 263, in run_path

pkg_name=pkg_name, script_name=fname)


 "C:\Users\Volker\Anaconda3\envs\napari_new\lib\runpy.py", line 96, in _run_module_code

mod_name, mod_spec, pkg_name, script_name)


 "C:\Users\Volker\Anaconda3\envs\napari_new\lib\runpy.py", line 85, in _run_code

exec(code, run_globals)


 "c:\Users\Volker\Dropbox\Github\NapariPlayground\Volume\show_volume.py", line 25, in <module>

viewer.add_image(vol)


 "C:\Users\Volker\Anaconda3\envs\napari_new\lib\contextlib.py", line 119, in __exit__

next(self.gen)


 "C:\Users\Volker\Anaconda3\envs\napari_new\lib\site-packages\napari\_qt\event_loop.py", line 21, in gui_qt

app.exec_()


 "C:\Users\Volker\Anaconda3\envs\napari_new\lib\site-packages\vispy\app\backends\_qt.py", line 501, in event

out = super(QtBaseCanvasBackend, self).event(ev)


 "C:\Users\Volker\Anaconda3\envs\napari_new\lib\site-packages\vispy\app\backends\_qt.py", line 818, in paintGL

self._vispy_canvas.events.draw(region=None)


 "C:\Users\Volker\Anaconda3\envs\napari_new\lib\site-packages\vispy\util\event.py", line 455, in __call__

self._invoke_callback(cb, event)


 "C:\Users\Volker\Anaconda3\envs\napari_new\lib\site-packages\vispy\util\event.py", line 475, in _invoke_callback

self, cb_event=(cb, event))

<< caught exception here: >>


 "C:\Users\Volker\Anaconda3\envs\napari_new\lib\site-packages\OpenGL\latebind.py", line 41, in __call__

return self._finalCall( *args, **named )
TypeError: 'NoneType' object is not callable

C:\ProgramData\Anaconda3\lib\site-packages\lux\core\frame.py:700: UserWarning:Traceback (most recent call last):


 "C:\ProgramData\Anaconda3\lib\site-packages\lux\core\frame.py", line 651, in _repr_html_

self.maintain_recs()


 "C:\ProgramData\Anaconda3\lib\site-packages\lux\core\frame.py", line 480, in maintain_recs

custom_action_collection = custom_actions(rec_df)


 "C:\ProgramData\Anaconda3\lib\site-packages\lux\action\custom.py", line 74, in custom_actions

recommendation = lux.config.actions[action_name].action(ldf, args)


 "C:\ProgramData\Anaconda3\lib\site-packages\lux\action\univariate.py", line 96, in univariate

vlist = VisList(intent, ldf)


 "C:\ProgramData\Anaconda3\lib\site-packages\lux\vis\VisList.py", line 43, in __init__

self.refresh_source(self._source)


 "C:\ProgramData\Anaconda3\lib\site-packages\lux\vis\VisList.py", line 318, in refresh_source

lux.config.executor.execute(self._collection, ldf)


 "C:\ProgramData\Anaconda3\lib\site-packages\lux\executor\PandasExecutor.py", line 98, in execute

PandasExecutor.execute_aggregate(vis, isFiltered=filter_executed)


 "C:\ProgramData\Anaconda3\lib\site-packages\lux\executor\PandasExecutor.py", line 179, in execute_aggregate

vis.data.groupby(groupby_attr.attribute, dropna=False, history=False)


 "C:\ProgramData\Anaconda3\lib\site-packages\lux\core\frame.py", line 932, in groupby

groupby_obj = super(LuxDataFrame, self).groupby(*args, **kwargs)
TypeError: groupby() got an unexpected keyword argument 'dropna'
