Matplotlib 3.4.1 compatibility

[bnavigator]

#4878 is unfortunatly not enough. The following tests fail:

[  615s] =================================== FAILURES ===================================
[  615s] ___________________ TestErrorBarPlot.test_errorbars_color_op ___________________
[  615s] 
[  615s] self = ErrorPlot(apply_extents=True, apply_ranges=True, apply_ticks=True, aspect='square', bgcolor=None, cbar_extend=None, cb...nan), yrotation=None, yticks=None, zaxis=True, zformatter=None, zlabel=None, zlim=(nan, nan), zrotation=0, zticks=None)
[  615s] ranges = OrderedDict([('x', {'data': (0.0, 0.0), 'hard': (nan, nan), 'soft': (nan, nan), 'combined': (0.0, 0.0), 'robust': (nan...#000000', '#FF0000', '#00FF00'], dtype=object)]}, 'factors': array(['#000000', '#FF0000', '#00FF00'], dtype=object)})])
...
[  615s]         plot_data, plot_kwargs, axis_kwargs = self.get_data(element, ranges, style)
[  615s]     
[  615s]         with abbreviated_exception():
[  615s] >           handles = self.init_artists(ax, plot_data, plot_kwargs)
...
[  615s] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
[  615s] 
[  615s] kwargs = {'color': array(['#000000', '#FF0000', '#00FF00'], dtype=object)}
[  615s] k = 'color', v = array(['#000000', '#FF0000', '#00FF00'], dtype=object)
[  615s] 
[  615s]     def _check_color_like(**kwargs):
[  615s]         """
[  615s]         For each *key, value* pair in *kwargs*, check that *value* is color-like.
[  615s]         """
[  615s]         for k, v in kwargs.items():
[  615s]             if not is_color_like(v):
[  615s] >               raise ValueError(f"{v!r} is not a valid value for {k}")
[  615s] E               ValueError: array(['#000000', '#FF0000', '#00FF00'], dtype=object) is not a valid value for color
[  615s] 
[  615s] /usr/lib64/python3.8/site-packages/matplotlib/colors.py:156: ValueError
[  615s] 
[  615s] During handling of the above exception, another exception occurred:
[  615s] 
[  615s] self = <holoviews.tests.plotting.matplotlib.testerrorbarplot.TestErrorBarPlot testMethod=test_errorbars_color_op>
[  615s] 
[  615s]     def test_errorbars_color_op(self):
[  615s]         errorbars = ErrorBars([(0, 0, 0.1, 0.2, '#000000'), (0, 1, 0.2, 0.4, '#FF0000'), (0, 2, 0.6, 1.2, '#00FF00')],
[  615s]                               vdims=['y', 'perr', 'nerr', 'color']).options(color='color')
[  615s] >       plot = mpl_renderer.get_plot(errorbars)
[  615s] 
[  615s] holoviews/tests/plotting/matplotlib/testerrorbarplot.py:19: 
[  615s] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
[  615s] holoviews/plotting/renderer.py:243: in get_plot
[  615s]     plot.update(init_key)
[  615s] holoviews/plotting/mpl/plot.py:251: in update
[  615s]     return self.initialize_plot()
[  615s] holoviews/plotting/mpl/plot.py:47: in wrapper
[  615s]     return f(self, *args, **kwargs)
[  615s] holoviews/plotting/mpl/element.py:517: in initialize_plot
[  615s]     handles = self.init_artists(ax, plot_data, plot_kwargs)
[  615s] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
[  615s] 
[  615s] self = <holoviews.core.options.abbreviated_exception object at 0x7efc85b03160>
[  615s] etype = <class 'ValueError'>
[  615s] value = ValueError("array(['#000000', '#FF0000', '#00FF00'], dtype=object) is not a valid value for color")
[  615s] traceback = <traceback object at 0x7efc86305440>
[  615s] 
[  615s]     def __exit__(self, etype, value, traceback):
[  615s]         if isinstance(value, Exception):
[  615s] >           raise AbbreviatedException(etype, value, traceback)
[  615s] E           holoviews.core.options.AbbreviatedException: ValueError: array(['#000000', '#FF0000', '#00FF00'], dtype=object) is not a valid value for color
[  615s] E           
[  615s] E           To view the original traceback, catch this exception and call print_traceback() method.
[  615s] 
[  615s] holoviews/core/options.py:227: AbbreviatedException
...
[  616s] __________________ TestMplGraphPlot.test_graph_op_node_alpha ___________________
[  616s] 
[  616s] self = <holoviews.tests.plotting.matplotlib.testgraphplot.TestMplGraphPlot testMethod=test_graph_op_node_alpha>
[  616s] 
[  616s]     def test_graph_op_node_alpha(self):
[  616s]         edges = [(0, 1), (0, 2)]
[  616s]         nodes = Nodes([(0, 0, 0, 0.2), (0, 1, 1, 0.6), (1, 1, 2, 1)], vdims='alpha')
[  616s]         graph = Graph((edges, nodes)).options(node_alpha='alpha')
[  616s]         with self.assertRaises(Exception):
[  616s] >           mpl_renderer.get_plot(graph)
[  616s] E           AssertionError: Exception not raised
[  616s] 
[  616s] holoviews/tests/plotting/matplotlib/testgraphplot.py:207: AssertionError
[  616s] ________________ TestMplTriMeshPlot.test_trimesh_op_node_alpha _________________
[  616s] 
[  616s] self = <holoviews.tests.plotting.matplotlib.testgraphplot.TestMplTriMeshPlot testMethod=test_trimesh_op_node_alpha>
[  616s] 
[  616s]     def test_trimesh_op_node_alpha(self):
[  616s]         edges = [(0, 1, 2), (1, 2, 3)]
[  616s]         nodes = [(-1, -1, 0, 0.2), (0, 0, 1, 0.6), (0, 1, 2, 1), (1, 0, 3, 0.3)]
[  616s]         trimesh = TriMesh((edges, Nodes(nodes, vdims='alpha'))).options(node_alpha='alpha')
[  616s]         with self.assertRaises(Exception):
[  616s] >           mpl_renderer.get_plot(trimesh)
[  616s] E           AssertionError: Exception not raised
[  616s] 
[  616s] holoviews/tests/plotting/matplotlib/testgraphplot.py:392: AssertionError
...
[  616s] =========================== short test summary info ============================
[  616s] FAILED holoviews/tests/plotting/matplotlib/testerrorbarplot.py::TestErrorBarPlot::test_errorbars_color_op
[  616s] FAILED holoviews/tests/plotting/matplotlib/testerrorbarplot.py::TestErrorBarPlot::test_errorbars_color_op_update
[  616s] FAILED holoviews/tests/plotting/matplotlib/testgraphplot.py::TestMplGraphPlot::test_graph_op_node_alpha
[  616s] FAILED holoviews/tests/plotting/matplotlib/testgraphplot.py::TestMplTriMeshPlot::test_trimesh_op_node_alpha

Full buildlog:
holoviews_mpl3.4.1_log.txt

• holoviews 1.14.3
• matplotlib 3.4.1

https://matplotlib.org/stable/users/whats_new.html#colors-and-colormaps

Passing with mpl 3.3.4: holowviews-mpl3.3.txt

[philippjfr]

Thanks for reporting this. Guess we'll be releasing 1.14.4 very soon.

[hoxbro]

I'm pretty sure I fixed this in #4860

[github-actions]

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