Uint32 color support

Community Support
1

I’m following the example here: General visual properties — Bokeh 3.7.3 Documentation

When setting the fill_color with just one value from the numpy uint32 array, this will cause a property validation error. Is that expected?

import numpy as np

from bokeh.plotting import figure, show

x = [1, 2, 3]
y1 = [1, 4, 2]
y2 = [2, 1, 4]
y3 = [4, 3, 2]

# use a single RGBA color
single_color = (255, 0, 0, 0.5)

# use a list of different colors
list_of_colors = [
    "hsl(60deg 100% 50% / 1.0)",
    "rgba(0, 0, 255, 0.9)",
    "LightSeaGreen",
]

# use a series of color values as numpy array
numpy_array_of_colors = np.array(
    [
        0xFFFF00FF,
        0x00FF00FF,
        0xFF000088,
    ],
    np.uint32,
)

p = figure(title="Specifying colors")

# add glyphs to plot
p.line(x, y1, line_color=single_color)
p.circle(x, y2, radius=0.12, color=list_of_colors)
p.scatter(x, y3, size=30, marker="triangle", fill_color=numpy_array_of_colors[0])

show(p)
2

It looks like scalar uint32 case wasn’t implemented, when support for ndarrays of this and other dtypes was added. Please start an issue for this and it should be an easy fix.

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