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Error at initialization:
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call last)
<ipython-input-7-d827d80a32eb> in <module>
----> 1 pn.Column(controller.controls(), controller.view()).app()
~\examples\tutorial\panel_bug_thread.py in view(self)
66 def view(self):
67 pb = hv.DynamicMap(self._make_pb)
---> 68 return pn.Row(pn.Spacer(width=150), pn.Column(self._update_text, pb))
69
70 def layout(self):
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\panel\layout.py in __init__(self, *objects, **params)
49 def __init__(self, *objects, **params):
50 from .pane import panel
---> 51 objects = [panel(pane, _internal=True) for pane in objects]
52 super(Panel, self).__init__(objects=objects, **params)
53
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\panel\layout.py in <listcomp>(.0)
49 def __init__(self, *objects, **params):
50 from .pane import panel
---> 51 objects = [panel(pane, _internal=True) for pane in objects]
52 super(Panel, self).__init__(objects=objects, **params)
53
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\panel\pane.py in panel(obj, **kwargs)
45 return obj
46 internal = kwargs.pop('_internal', False)
---> 47 pane = PaneBase.get_pane_type(obj)(obj, **kwargs)
48 if internal and len(pane.layout) == 1:
49 return pane.layout[0]
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\panel\param.py in __init__(self, object, **params)
392 if p not in self.params()}
393 super(ParamMethod, self).__init__(object, **params)
--> 394 self._pane = Pane(self.object(), name=self.name,
395 **dict(_temporary=True, **self._kwargs))
396 self._inner_layout = Row(self._pane)
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\param\parameterized.py in _depends(*args, **kw)
232 @wraps(func)
233 def _depends(*args,**kw):
--> 234 return func(*args,**kw)
235
236 # storing here risks it being tricky to find if other libraries
~\examples\tutorial\panel_bug_thread.py in _update_text(self)
54 def _update_text(self):
55 if not self._stop:
---> 56 self.count += 1
57 return pn.pane.Markdown('####Working' + ' .' * int(self.t % 6), height=0, width=200)
58 else:
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\param\__init__.py in __set__(self, obj, val)
657
658 if not callable(val): self._check_value(val)
--> 659 super(Number,self).__set__(obj,val)
660
661
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\param\__init__.py in __set__(self, obj, val)
488 If val is dynamic, initialize it as a generator.
489 """
--> 490 super(Dynamic,self).__set__(obj,val)
491
492 dynamic = callable(val)
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\param\parameterized.py in __set__(self, obj, val)
674 obj = self._owner if obj is None else obj
675 for s in watchers:
--> 676 obj.param._call_watcher(s, event)
677
678
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\param\parameterized.py in _call_watcher(self_, watcher, event)
1126 self_._watchers.append(watcher)
1127 elif watcher.mode == 'args':
-> 1128 watcher.fn(self_._update_event_type(watcher, event, self_.self_or_cls.param._TRIGGER))
1129 else:
1130 event = self_._update_event_type(watcher, event, self_.self_or_cls.param._TRIGGER)
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\holoviews\streams.py in _watcher(self, *events)
628 def _watcher(self, *events):
629 self._memoize = not any(e.type == 'triggered' for e in events)
--> 630 self.trigger([self])
631 self._memoize = True
632
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\holoviews\streams.py in trigger(cls, streams)
155 with triggering_streams(streams):
156 for subscriber in subscribers:
--> 157 subscriber(**dict(union))
158
159 for stream in streams:
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\holoviews\plotting\plot.py in refresh(self, **kwargs)
613 stream_key = util.wrap_tuple_streams(key, self.dimensions, self.streams)
614
--> 615 self._trigger_refresh(stream_key)
616 if self.comm is not None and self.top_level:
617 self.push()
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\holoviews\plotting\plot.py in _trigger_refresh(self, key)
622 # Update if not top-level, batched or an ElementPlot
623 if not self.top_level or isinstance(self, GenericElementPlot):
--> 624 self.update(key)
625
626
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\holoviews\plotting\plot.py in update(self, key)
594 if len(self) == 1 and ((key == 0) or (key == self.keys[0])) and not self.drawn:
595 return self.initialize_plot()
--> 596 item = self.__getitem__(key)
597 self.traverse(lambda x: setattr(x, '_updated', True))
598 return item
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\holoviews\plotting\plot.py in __getitem__(self, frame)
259 if not isinstance(frame, tuple):
260 frame = self.keys[frame]
--> 261 self.update_frame(frame)
262 return self.state
263
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\holoviews\plotting\bokeh\element.py in update_frame(self, key, ranges, plot, element)
1133 if not self.overlaid:
1134 self._update_ranges(style_element, ranges)
-> 1135 self._update_plot(key, plot, style_element)
1136 self._set_active_tools(plot)
1137
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\holoviews\plotting\bokeh\element.py in _update_plot(self, key, plot, element)
597 if not self.show_grid:
598 plot.xgrid.grid_line_color = None
--> 599 plot.ygrid.grid_line_color = None
600 else:
601 replace = ['bounds', 'bands', 'visible']
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\models\plots.py in __setattr__(self, attr, value)
36 def __setattr__(self, attr, value):
37 for x in self:
---> 38 setattr(x, attr, value)
39
40 def __dir__(self):
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\core\has_props.py in __setattr__(self, name, value)
279
280 if name in props or (descriptor is not None and descriptor.fset is not None):
--> 281 super(HasProps, self).__setattr__(name, value)
282 else:
283 matches, text = difflib.get_close_matches(name.lower(), props), "similar"
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\core\property\descriptors.py in __set__(self, obj, value, setter)
544 raise RuntimeError("%s.%s is a readonly property" % (obj.__class__.__name__, self.name))
545
--> 546 self._internal_set(obj, value, setter=setter)
547
548 def __delete__(self, obj):
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\core\property\descriptors.py in _internal_set(self, obj, value, hint, setter)
768
769 old = self.__get__(obj, obj.__class__)
--> 770 self._real_set(obj, old, value, hint=hint, setter=setter)
771
772 def _real_set(self, obj, old, value, hint=None, setter=None):
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\core\property\descriptors.py in _real_set(self, obj, old, value, hint, setter)
837
838 # for notification purposes, "old" should be the logical old
--> 839 self._trigger(obj, old, value, hint=hint, setter=setter)
840
841 # called when a container is mutated "behind our back" and
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\core\property\descriptors.py in _trigger(self, obj, old, value, hint, setter)
914 '''
915 if hasattr(obj, 'trigger'):
--> 916 obj.trigger(self.name, old, value, hint, setter)
917
918
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\model.py in trigger(self, attr, old, new, hint, setter)
594 self._document._invalidate_all_models()
595 # chain up to invoke callbacks
--> 596 super(Model, self).trigger(attr, old, new, hint=hint, setter=setter)
597
598 def _attach_document(self, doc):
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\util\callback_manager.py in trigger(self, attr, old, new, hint, setter)
118 callback(attr, old, new)
119 if hasattr(self, '_document') and self._document is not None:
--> 120 self._document._notify_change(self, attr, old, new, hint, setter, invoke)
121 else:
122 invoke()
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\document\document.py in _notify_change(self, model, attr, old, new, hint, setter, callback_invoker)
1003
1004 event = ModelChangedEvent(self, model, attr, old, new, serializable_new, hint, setter, callback_invoker)
-> 1005 self._trigger_on_change(event)
1006
1007 def _push_all_models_freeze(self):
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\document\document.py in _trigger_on_change(self, event)
1098 for cb in self._callbacks.values():
1099 cb(event)
-> 1100 self._with_self_as_curdoc(invoke_callbacks)
1101
1102 def _with_self_as_curdoc(self, f):
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\document\document.py in _with_self_as_curdoc(self, f)
1111 else:
1112 set_curdoc(self)
-> 1113 return f()
1114 finally:
1115 set_curdoc(old_doc)
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\document\document.py in invoke_callbacks()
1097 def invoke_callbacks():
1098 for cb in self._callbacks.values():
-> 1099 cb(event)
1100 self._with_self_as_curdoc(invoke_callbacks)
1101
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\document\document.py in <lambda>(event)
667 def on_change_dispatch_to(self, receiver):
668 if not receiver in self._callbacks:
--> 669 self._callbacks[receiver] = lambda event: event.dispatch(receiver)
670
671 def on_session_destroyed(self, *callbacks):
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\document\events.py in dispatch(self, receiver)
243
244 '''
--> 245 super(ModelChangedEvent, self).dispatch(receiver)
246 if hasattr(receiver, '_document_model_changed'):
247 receiver._document_model_changed(self)
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\document\events.py in dispatch(self, receiver)
125 super(DocumentPatchedEvent, self).dispatch(receiver)
126 if hasattr(receiver, '_document_patched'):
--> 127 receiver._document_patched(self)
128
129 def generate(self, references, buffers):
~\Miniconda3\envs\pyviz-tutorial\lib\site-packages\bokeh\server\session.py in _document_patched(self, event)
178
179 if self._pending_writes is None:
--> 180 raise RuntimeError("_pending_writes should be non-None when we have a document lock, and we should have the lock when the document changes")
181
182 # TODO (havocp): our "change sync" protocol is flawed because if both
RuntimeError: _pending_writes should be non-None when we have a document lock, and we should have the lock when the document changes
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