ALL software version info
I am using the latest released versions of all the relevant libraries.
Hvplot 0.5.2
Datshader 0.10.0
Numba 0.48.0
Description of expected behavior and the observed behavior
Complete, minimal, self-contained example code that reproduces the issue
I am trying to plot an xarray dataset backed by dask using hvplot. Here is how I load the data. (Should be reproducible with intake installed.)
from intake import open_catalog
cat = open_catalog("https://raw.githubusercontent.com/pangeo-data/pangeo-datastore/master/intake-catalogs/ocean.yaml")
ds = cat["sea_surface_height"].to_dask()
The following code works fine:
ds.sla.hvplot.image('longitude', 'latitude', rasterize=True, dynamic=True)
However, if I try to do quadmesh instead
ds.sla.hvplot.quadmesh('longitude', 'latitude', rasterize=True, dynamic=True)
I get a big long error.
Stack traceback and/or browser JavaScript console output
WARNING:param.dynamic_operation: Callable raised "TypingError('Failed in nopython mode pipeline (step: nopython frontend)\nnon-precise type pyobject\n[1] During: typing of argument at <extend_cpu> (4)\n\nFile "<extend_cpu>", line 4:\n<source missing, REPL/exec in use?>\n\nThis error may have been caused by the following argument(s):\n- argument 4: cannot determine Numba type of <class \'dask.array.core.Array\'>\n')".
Invoked as dynamic_operation(numpy.datetime64('1993-01-01T00:00:00.000000000'), height=300, scale=1.0, width=700, x_range=None, y_range=None)
WARNING:param.dynamic_operation: Callable raised "TypingError('Failed in nopython mode pipeline (step: nopython frontend)\nnon-precise type pyobject\n[1] During: typing of argument at <extend_cpu> (4)\n\nFile "<extend_cpu>", line 4:\n<source missing, REPL/exec in use?>\n\nThis error may have been caused by the following argument(s):\n- argument 4: cannot determine Numba type of <class \'dask.array.core.Array\'>\n')".
Invoked as dynamic_operation(numpy.datetime64('1993-01-01T00:00:00.000000000'), height=300, scale=1.0, width=700, x_range=None, y_range=None)
---------------------------------------------------------------------------
TypingError Traceback (most recent call last)
/srv/conda/envs/pangeo/lib/python3.7/site-packages/IPython/core/formatters.py in __call__(self, obj, include, exclude)
968
969 if method is not None:
--> 970 return method(include=include, exclude=exclude)
971 return None
972 else:
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/dimension.py in _repr_mimebundle_(self, include, exclude)
1302 combined and returned.
1303 """
-> 1304 return Store.render(self)
1305
1306
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/options.py in render(cls, obj)
1393 data, metadata = {}, {}
1394 for hook in hooks:
-> 1395 ret = hook(obj)
1396 if ret is None:
1397 continue
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/ipython/display_hooks.py in pprint_display(obj)
280 if not ip.display_formatter.formatters['text/plain'].pprint:
281 return None
--> 282 return display(obj, raw_output=True)
283
284
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/ipython/display_hooks.py in display(obj, raw_output, **kwargs)
256 elif isinstance(obj, (HoloMap, DynamicMap)):
257 with option_state(obj):
--> 258 output = map_display(obj)
259 elif isinstance(obj, Plot):
260 output = render(obj)
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/ipython/display_hooks.py in wrapped(element)
144 try:
145 max_frames = OutputSettings.options['max_frames']
--> 146 mimebundle = fn(element, max_frames=max_frames)
147 if mimebundle is None:
148 return {}, {}
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/ipython/display_hooks.py in map_display(vmap, max_frames)
204 return None
205
--> 206 return render(vmap)
207
208
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/ipython/display_hooks.py in render(obj, **kwargs)
66 renderer = renderer.instance(fig='png')
67
---> 68 return renderer.components(obj, **kwargs)
69
70
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/plotting/renderer.py in components(self, obj, fmt, comm, **kwargs)
363 doc = Document()
364 with config.set(embed=embed):
--> 365 model = plot.layout._render_model(doc, comm)
366 return render_model(model, comm) if embed else render_mimebundle(model, doc, comm)
367 else:
/srv/conda/envs/pangeo/lib/python3.7/site-packages/panel/viewable.py in _render_model(self, doc, comm)
363 if comm is None:
364 comm = state._comm_manager.get_server_comm()
--> 365 model = self.get_root(doc, comm)
366
367 if config.embed:
/srv/conda/envs/pangeo/lib/python3.7/site-packages/panel/viewable.py in get_root(self, doc, comm)
534 """
535 doc = doc or _curdoc()
--> 536 root = self._get_model(doc, comm=comm)
537 self._preprocess(root)
538 ref = root.ref['id']
/srv/conda/envs/pangeo/lib/python3.7/site-packages/panel/layout.py in _get_model(self, doc, root, parent, comm)
134 if root is None:
135 root = model
--> 136 objects = self._get_objects(model, [], doc, root, comm)
137 props = dict(self._init_properties(), objects=objects)
138 model.update(**self._process_param_change(props))
/srv/conda/envs/pangeo/lib/python3.7/site-packages/panel/layout.py in _get_objects(self, model, old_objects, doc, root, comm)
124 else:
125 try:
--> 126 child = pane._get_model(doc, root, model, comm)
127 except RerenderError:
128 return self._get_objects(model, current_objects[:i], doc, root, comm)
/srv/conda/envs/pangeo/lib/python3.7/site-packages/panel/pane/holoviews.py in _get_model(self, doc, root, parent, comm)
225 plot = self.object
226 else:
--> 227 plot = self._render(doc, comm, root)
228
229 plot.pane = self
/srv/conda/envs/pangeo/lib/python3.7/site-packages/panel/pane/holoviews.py in _render(self, doc, comm, root)
284 kwargs = {}
285
--> 286 return renderer.get_plot(self.object, **kwargs)
287
288 def _cleanup(self, root):
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/plotting/bokeh/renderer.py in get_plot(self_or_cls, obj, doc, renderer, **kwargs)
71 combining the bokeh model with another plot.
72 """
---> 73 plot = super(BokehRenderer, self_or_cls).get_plot(obj, doc, renderer, **kwargs)
74 if plot.document is None:
75 plot.document = Document() if self_or_cls.notebook_context else curdoc()
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/plotting/renderer.py in get_plot(self_or_cls, obj, doc, renderer, comm, **kwargs)
200
201 # Initialize DynamicMaps with first data item
--> 202 initialize_dynamic(obj)
203
204 if not renderer:
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/plotting/util.py in initialize_dynamic(obj)
249 continue
250 if not len(dmap):
--> 251 dmap[dmap._initial_key()]
252
253
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/spaces.py in __getitem__(self, key)
1278 # Not a cross product and nothing cached so compute element.
1279 if cache is not None: return cache
-> 1280 val = self._execute_callback(*tuple_key)
1281 if data_slice:
1282 val = self._dataslice(val, data_slice)
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/spaces.py in _execute_callback(self, *args)
1052
1053 with dynamicmap_memoization(self.callback, self.streams):
-> 1054 retval = self.callback(*args, **kwargs)
1055 return self._style(retval)
1056
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/spaces.py in __call__(self, *args, **kwargs)
691
692 try:
--> 693 ret = self.callable(*args, **kwargs)
694 except KeyError:
695 # KeyError is caught separately because it is used to signal
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/util/__init__.py in dynamic_operation(*key, **kwargs)
983
984 def dynamic_operation(*key, **kwargs):
--> 985 key, obj = resolve(key, kwargs)
986 return apply(obj, *key, **kwargs)
987
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/util/__init__.py in resolve(key, kwargs)
976 elif isinstance(map_obj, DynamicMap) and map_obj._posarg_keys and not key:
977 key = tuple(kwargs[k] for k in map_obj._posarg_keys)
--> 978 return key, map_obj[key]
979
980 def apply(element, *key, **kwargs):
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/spaces.py in __getitem__(self, key)
1278 # Not a cross product and nothing cached so compute element.
1279 if cache is not None: return cache
-> 1280 val = self._execute_callback(*tuple_key)
1281 if data_slice:
1282 val = self._dataslice(val, data_slice)
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/spaces.py in _execute_callback(self, *args)
1052
1053 with dynamicmap_memoization(self.callback, self.streams):
-> 1054 retval = self.callback(*args, **kwargs)
1055 return self._style(retval)
1056
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/spaces.py in __call__(self, *args, **kwargs)
691
692 try:
--> 693 ret = self.callable(*args, **kwargs)
694 except KeyError:
695 # KeyError is caught separately because it is used to signal
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/util/__init__.py in dynamic_operation(*key, **kwargs)
984 def dynamic_operation(*key, **kwargs):
985 key, obj = resolve(key, kwargs)
--> 986 return apply(obj, *key, **kwargs)
987
988 operation = self.p.operation
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/util/__init__.py in apply(element, *key, **kwargs)
980 def apply(element, *key, **kwargs):
981 kwargs = dict(util.resolve_dependent_kwargs(self.p.kwargs), **kwargs)
--> 982 return self._process(element, key, kwargs)
983
984 def dynamic_operation(*key, **kwargs):
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/util/__init__.py in _process(self, element, key, kwargs)
962 elif isinstance(self.p.operation, Operation):
963 kwargs = {k: v for k, v in kwargs.items() if k in self.p.operation.param}
--> 964 return self.p.operation.process_element(element, key, **kwargs)
965 else:
966 return self.p.operation(element, **kwargs)
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/operation.py in process_element(self, element, key, **params)
170 self.p = param.ParamOverrides(self, params,
171 allow_extra_keywords=self._allow_extra_keywords)
--> 172 return self._apply(element, key)
173
174
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/operation.py in _apply(self, element, key)
130 element_pipeline = getattr(element, '_pipeline', None)
131
--> 132 ret = self._process(element, key)
133 for hook in self._postprocess_hooks:
134 ret = hook(self, ret, **kwargs)
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/operation/datashader.py in _process(self, element, key)
1413 if k in transform.param})
1414 op._precomputed = self._precomputed
-> 1415 element = element.map(op, predicate)
1416 self._precomputed = op._precomputed
1417
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/data/__init__.py in pipelined_fn(*args, **kwargs)
212
213 try:
--> 214 result = method_fn(*args, **kwargs)
215
216 op = method_op.instance(
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/data/__init__.py in map(self, *args, **kwargs)
1167
1168 def map(self, *args, **kwargs):
-> 1169 return super(Dataset, self).map(*args, **kwargs)
1170 map.__doc__ = LabelledData.map.__doc__
1171
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/dimension.py in map(self, map_fn, specs, clone)
703 return deep_mapped
704 else:
--> 705 return map_fn(self) if applies else self
706
707
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/operation.py in __call__(self, element, **kwargs)
190 elif ((self._per_element and isinstance(element, Element)) or
191 (not self._per_element and isinstance(element, ViewableElement))):
--> 192 return self._apply(element)
193 elif 'streams' not in kwargs:
194 kwargs['streams'] = self.p.streams
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/core/operation.py in _apply(self, element, key)
130 element_pipeline = getattr(element, '_pipeline', None)
131
--> 132 ret = self._process(element, key)
133 for hook in self._postprocess_hooks:
134 ret = hook(self, ret, **kwargs)
/srv/conda/envs/pangeo/lib/python3.7/site-packages/holoviews/operation/datashader.py in _process(self, element, key)
1081
1082 vdim = getattr(agg_fn, 'column', element.vdims[0].name)
-> 1083 agg = cvs.quadmesh(data[vdim], x.name, y.name, agg_fn)
1084 xdim, ydim = list(agg.dims)[:2][::-1]
1085 if xtype == "datetime":
/srv/conda/envs/pangeo/lib/python3.7/site-packages/datashader/core.py in quadmesh(self, source, x, y, agg)
770 dims=list(xarr.dims)))
771
--> 772 return bypixel(source, self, glyph, agg)
773
774 # TODO re 'untested', below: Consider replacing with e.g. a 3x3
/srv/conda/envs/pangeo/lib/python3.7/site-packages/datashader/core.py in bypixel(source, canvas, glyph, agg)
1159 with np.warnings.catch_warnings():
1160 np.warnings.filterwarnings('ignore', r'All-NaN (slice|axis) encountered')
-> 1161 return bypixel.pipeline(source, schema, canvas, glyph, agg)
1162
1163
/srv/conda/envs/pangeo/lib/python3.7/site-packages/datashader/utils.py in __call__(self, head, *rest, **kwargs)
91 typ = type(head)
92 if typ in lk:
---> 93 return lk[typ](head, *rest, **kwargs)
94 for cls in getmro(typ)[1:]:
95 if cls in lk:
/srv/conda/envs/pangeo/lib/python3.7/site-packages/datashader/data_libraries/xarray.py in xarray_pipeline(df, schema, canvas, glyph, summary)
17 def xarray_pipeline(df, schema, canvas, glyph, summary):
18 cuda = cupy and isinstance(df[glyph.name].data, cupy.ndarray)
---> 19 return glyph_dispatch(glyph, df, schema, canvas, summary, cuda)
20
21
/srv/conda/envs/pangeo/lib/python3.7/site-packages/datashader/utils.py in __call__(self, head, *rest, **kwargs)
94 for cls in getmro(typ)[1:]:
95 if cls in lk:
---> 96 return lk[cls](head, *rest, **kwargs)
97 raise TypeError("No dispatch for {0} type".format(typ))
98
/srv/conda/envs/pangeo/lib/python3.7/site-packages/datashader/data_libraries/pandas.py in default(glyph, source, schema, canvas, summary, cuda)
43
44 bases = create((height, width))
---> 45 extend(bases, source, x_st + y_st, x_range + y_range)
46
47 return finalize(bases,
/srv/conda/envs/pangeo/lib/python3.7/site-packages/datashader/glyphs/quadmesh.py in extend(aggs, xr_ds, vt, bounds)
186 do_extend = extend_cpu
187
--> 188 do_extend(xs, ys, *aggs_and_cols)
189
190 return extend
/srv/conda/envs/pangeo/lib/python3.7/site-packages/numba/dispatcher.py in _compile_for_args(self, *args, **kws)
399 e.patch_message(msg)
400
--> 401 error_rewrite(e, 'typing')
402 except errors.UnsupportedError as e:
403 # Something unsupported is present in the user code, add help info
/srv/conda/envs/pangeo/lib/python3.7/site-packages/numba/dispatcher.py in error_rewrite(e, issue_type)
342 raise e
343 else:
--> 344 reraise(type(e), e, None)
345
346 argtypes = []
/srv/conda/envs/pangeo/lib/python3.7/site-packages/numba/six.py in reraise(tp, value, tb)
666 value = tp()
667 if value.__traceback__ is not tb:
--> 668 raise value.with_traceback(tb)
669 raise value
670
TypingError: Failed in nopython mode pipeline (step: nopython frontend)
non-precise type pyobject
[1] During: typing of argument at <extend_cpu> (4)
File "<extend_cpu>", line 4:
<source missing, REPL/exec in use?>
This error may have been caused by the following argument(s):
- argument 4: cannot determine Numba type of <class 'dask.array.core.Array'>
I recognize that the best place for this issue might be in another repo, but I thought I would try here first.
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