Color cycles for Bokeh charts

[schultzmattd]

I noticed that whenever I try to use the bokeh.charts.BoxPlot function I hit an error with plots with more than 6 boxplots.

import numpy as np from bokeh.charts import BoxPlot test = {} for i in range(0,7): test[str(i)] = np.random.normal(0,1,100) plot = BoxPlot(test) show(plot)

This is the resulting stacktrace:

Traceback (most recent call last): File "temp.py", line 6, in <module> plot = BoxPlot(test) File "/usr/local/lib/python2.7/site-packages/bokeh/charts/builder/boxplot_builder.py", line 84, in BoxPlot xscale=xscale, yscale=yscale, xgrid=xgrid, ygrid=ygrid, **kw File "/usr/local/lib/python2.7/site-packages/bokeh/charts/_builder.py", line 42, in create_and_build chart.add_builder(builder) File "/usr/local/lib/python2.7/site-packages/bokeh/charts/_chart.py", line 118, in add_builder builder.create(self) File "/usr/local/lib/python2.7/site-packages/bokeh/charts/_builder.py", line 169, in create chart.add_renderers(self, renderers) File "/usr/local/lib/python2.7/site-packages/bokeh/charts/_chart.py", line 113, in add_renderers self.renderers += renderers File "/usr/local/lib/python2.7/site-packages/bokeh/charts/builder/boxplot_builder.py", line 283, in _yield_renderers line_color="black", fill_color=self.palette[i]) IndexError: list index out of range

It appears that whatever predefined color list for the BoxPlot function has run out of colors for new boxplots.

Is there a way to either define a new color list (ideally, a cycle that will simply repeat colors if it runs out) or disable coloring entirely?

[fpliger]

This is definitely a bug but you can bypass it by specifying a custom palette all the colors you want. If you specify a palette long enough you'll avoid stepping this bug. Here's a quick workaround to make your code work while this isn't fixed:

import numpy as np
from bokeh.charts import BoxPlot
from bokeh.charts.utils import cycle_colors
test = {}
for i in range(0,10):
    test[str(i)] = np.random.normal(0,1,100)
palette = cycle_colors(test)
plot = BoxPlot(test, palette=palette)
show(plot)