Traceback (most recent call last):


 "/home/karin/Documents/git/orange3venv/lib/python3.6/site-packages/orangecanvas/scheme/signalmanager.py", line 936, in __process_next

if self.__process_next_helper(use_max_active=True):


 "/home/karin/Documents/git/orange3venv/lib/python3.6/site-packages/orangecanvas/scheme/signalmanager.py", line 974, in __process_next_helper

self.process_node(selected_node)


 "/home/karin/Documents/git/orange3venv/lib/python3.6/site-packages/orangecanvas/scheme/signalmanager.py", line 605, in process_node

self.send_to_node(node, signals_in)


 "/home/karin/Documents/git/orange-widget-base/orangewidget/workflow/widgetsscheme.py", line 792, in send_to_node

self.process_signals_for_widget(node, widget, signals)


 "/home/karin/Documents/git/orange-widget-base/orangewidget/workflow/widgetsscheme.py", line 826, in process_signals_for_widget

handler(*args)


 "/home/karin/Documents/git/orange3/Orange/widgets/visualize/owheatmap.py", line 557, in set_dataset

self.update_heatmaps()


 "/home/karin/Documents/git/orange3/Orange/widgets/visualize/owheatmap.py", line 589, in update_heatmaps

self.construct_heatmaps_scene(parts, self.effective_data)


 "/home/karin/Documents/git/orange3/Orange/widgets/visualize/owheatmap.py", line 773, in construct_heatmaps_scene

self.setup_scene(parts, data)


 "/home/karin/Documents/git/orange3/Orange/widgets/visualize/owheatmap.py", line 796, in setup_scene

widget.setHeatmaps(parts)


 "/home/karin/Documents/git/orange3/Orange/widgets/visualize/utils/heatmap.py", line 450, in setHeatmaps

data=X_part, span=parts.span, colormap=colormap,


 "/home/karin/Documents/git/orange3/Orange/widgets/visualize/utils/heatmap.py", line 953, in __init__

self.setHeatmapData(data)


 "/home/karin/Documents/git/orange3/Orange/widgets/visualize/utils/heatmap.py", line 987, in setHeatmapData

self.__updatePixmap()


 "/home/karin/Documents/git/orange3/Orange/widgets/visualize/utils/heatmap.py", line 1020, in __updatePixmap

qimage = qimage_from_array(rgb)


 "/home/karin/Documents/git/orange3/Orange/widgets/utils/image.py", line 33, in qimage_from_array

buffer = img.bits().asarray(w * h * 4)
AttributeError: 'NoneType' object has no attribute 'asarray'

Traceback (most recent call last):


 "D:\Anaconda3\lib\site-packages\rqalpha\main.py", line 211, in run

env.set_data_source(BaseDataSource(config.base.data_bundle_path))


 "D:\Anaconda3\lib\site-packages\rqalpha\data\base_data_source.py", line 57, in __init__

self._instruments = InstrumentStore(_p('instruments.pk'))


 "D:\Anaconda3\lib\site-packages\rqalpha\data\instrument_store.py", line 26, in __init__

self._instruments = [Instrument(i) for i in d]


 "D:\Anaconda3\lib\site-packages\rqalpha\data\instrument_store.py", line 26, in <listcomp>

self._instruments = [Instrument(i) for i in d]


 "D:\Anaconda3\lib\site-packages\rqalpha\model\instrument.py", line 44, in __init__

self._ins_dict["listed_date"] = self._fix_date(dic["listed_date"], self.DEFAULT_LISTED_DATE)


 "D:\Anaconda3\lib\site-packages\rqalpha\model\instrument.py", line 35, in _fix_date

year, month, day = ds.split('-')
AttributeError: 'datetime.datetime' object has no attribute 'split'
