Adding label to contour * image crashes

[ahuang11]

This works

import hvplot.xarray
import xarray as xr
import holoviews as hv
hv.extension()

ds = xr.tutorial.open_dataset('air_temperature').isel(time=0)
ds.hvplot('lon', 'lat') * ds.hvplot.contour('lon', 'lat').opts(colorbar=False)

This crashes:

import hvplot.xarray
import xarray as xr
import holoviews as hv
hv.extension()

ds = xr.tutorial.open_dataset('air_temperature').isel(time=0)
ds.hvplot('lon', 'lat', label='air') * ds.hvplot.contour('lon', 'lat').opts(colorbar=False)

Error below in comments

[jbednar]

Can you please add the "crash" error messages?

[ahuang11]

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
~/anaconda3/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:

~/anaconda3/lib/python3.7/site-packages/holoviews/core/dimension.py in _repr_mimebundle_(self, include, exclude)
   1292         combined and returned.
   1293         """
-> 1294         return Store.render(self)
   1295 
   1296 

~/anaconda3/lib/python3.7/site-packages/holoviews/core/options.py in render(cls, obj)
   1364         data, metadata = {}, {}
   1365         for hook in hooks:
-> 1366             ret = hook(obj)
   1367             if ret is None:
   1368                 continue

~/anaconda3/lib/python3.7/site-packages/holoviews/ipython/display_hooks.py in pprint_display(obj)
    279     if not ip.display_formatter.formatters['text/plain'].pprint:
    280         return None
--> 281     return display(obj, raw_output=True)
    282 
    283 

~/anaconda3/lib/python3.7/site-packages/holoviews/ipython/display_hooks.py in display(obj, raw_output, **kwargs)
    249     elif isinstance(obj, (CompositeOverlay, ViewableElement)):
    250         with option_state(obj):
--> 251             output = element_display(obj)
    252     elif isinstance(obj, (Layout, NdLayout, AdjointLayout)):
    253         with option_state(obj):

~/anaconda3/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 {}, {}

~/anaconda3/lib/python3.7/site-packages/holoviews/ipython/display_hooks.py in element_display(element, max_frames)
    190         return None
    191 
--> 192     return render(element)
    193 
    194 

~/anaconda3/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 

~/anaconda3/lib/python3.7/site-packages/holoviews/plotting/renderer.py in components(self, obj, fmt, comm, **kwargs)
    319             plot = obj
    320         else:
--> 321             plot, fmt = self._validate(obj, fmt)
    322 
    323         data, metadata = {}, {}

~/anaconda3/lib/python3.7/site-packages/holoviews/plotting/renderer.py in _validate(self, obj, fmt, **kwargs)
    218         if isinstance(obj, tuple(self.widgets.values())):
    219             return obj, 'html'
--> 220         plot = self.get_plot(obj, renderer=self, **kwargs)
    221 
    222         fig_formats = self.mode_formats['fig'][self.mode]

~/anaconda3/lib/python3.7/site-packages/holoviews/plotting/renderer.py in get_plot(self_or_cls, obj, renderer, **kwargs)
    205             init_key = tuple(v if d is None else d for v, d in
    206                              zip(plot.keys[0], defaults))
--> 207             plot.update(init_key)
    208         else:
    209             plot = obj

~/anaconda3/lib/python3.7/site-packages/holoviews/plotting/mpl/plot.py in update(self, key)
    247     def update(self, key):
    248         if len(self) == 1 and ((key == 0) or (key == self.keys[0])) and not self.drawn:
--> 249             return self.initialize_plot()
    250         return self.__getitem__(key)
    251 

~/anaconda3/lib/python3.7/site-packages/holoviews/plotting/mpl/plot.py in wrapper(self, *args, **kwargs)
     52     def wrapper(self, *args, **kwargs):
     53         with _rc_context(self.fig_rcparams):
---> 54             return f(self, *args, **kwargs)
     55     return wrapper
     56 

~/anaconda3/lib/python3.7/site-packages/holoviews/plotting/mpl/element.py in initialize_plot(self, ranges)
   1067 
   1068         if self.show_legend and element is not None:
-> 1069             self._adjust_legend(element, axis)
   1070 
   1071         return self._finalize_axis(key, element=element, ranges=ranges,

~/anaconda3/lib/python3.7/site-packages/holoviews/plotting/mpl/element.py in _adjust_legend(self, overlay, axis)
   1039             leg = axis.legend(list(data.keys()), list(data.values()),
   1040                               title=title, scatterpoints=1,
-> 1041                               **dict(leg_spec, **self._fontsize('legend')))
   1042             title_fontsize = self._fontsize('legend_title')
   1043             if title_fontsize:

~/anaconda3/lib/python3.7/site-packages/matplotlib/axes/_axes.py in legend(self, *args, **kwargs)
    421         if len(extra_args):
    422             raise TypeError('legend only accepts two non-keyword arguments')
--> 423         self.legend_ = mlegend.Legend(self, handles, labels, **kwargs)
    424         self.legend_._remove_method = self._remove_legend
    425         return self.legend_

~/anaconda3/lib/python3.7/site-packages/matplotlib/legend.py in __init__(self, parent, handles, labels, loc, numpoints, markerscale, markerfirst, scatterpoints, scatteryoffsets, prop, fontsize, borderpad, labelspacing, handlelength, handleheight, handletextpad, borderaxespad, columnspacing, ncol, mode, fancybox, shadow, title, title_fontsize, framealpha, edgecolor, facecolor, bbox_to_anchor, bbox_transform, frameon, handler_map)
    554 
    555         # init with null renderer
--> 556         self._init_legend_box(handles, labels, markerfirst)
    557 
    558         # If shadow is activated use framealpha if not

~/anaconda3/lib/python3.7/site-packages/matplotlib/legend.py in _init_legend_box(self, handles, labels, markerfirst)
    813                 # original artist/handle.
    814                 handle_list.append(handler.legend_artist(self, orig_handle,
--> 815                                                          fontsize, handlebox))
    816                 handles_and_labels.append((handlebox, textbox))
    817 

~/anaconda3/lib/python3.7/site-packages/matplotlib/legend_handler.py in legend_artist(self, legend, orig_handle, fontsize, handlebox)
    113         artists = self.create_artists(legend, orig_handle,
    114                                       xdescent, ydescent, width, height,
--> 115                                       fontsize, handlebox.get_transform())
    116 
    117         # create_artists will return a list of artists.

~/anaconda3/lib/python3.7/site-packages/matplotlib/legend_handler.py in create_artists(self, legend, orig_handle, xdescent, ydescent, width, height, fontsize, trans)
    677         for handle1 in orig_handle:
    678             handler = legend.get_legend_handler(handler_map, handle1)
--> 679             _a_list = handler.create_artists(
    680                 legend, handle1,
    681                 next(xds_cycle), ydescent, width, height, fontsize, trans)

AttributeError: 'NoneType' object has no attribute 'create_artists'

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.