unlabel_rgb does not work on a list as it says in the docs

The docs say "This function takes either an ‘rgb(a, b, c)’ color or a list of such colors" but a list fails.

windows 10, plotly 4.14.3

from plotly.colors import *
colorset = sequential.YlOrRd
print([unlabel_rgb(c) for c in colorset])
print(unlabel_rgb(colorset))

[(255.0, 255.0, 204.0), (255.0, 237.0, 160.0), (254.0, 217.0, 118.0), (254.0, 178.0, 76.0), (253.0, 141.0, 60.0), (252.0, 78.0, 42.0), (227.0, 26.0, 28.0), (189.0, 0.0, 38.0), (128.0, 0.0, 38.0)]

ValueError Traceback (most recent call last)
in
2 colorset = sequential.YlOrRd
3 print([unlabel_rgb(c) for c in colorset])
----> 4 print(unlabel_rgb(colorset))

~\Anaconda3\Lib\site-packages_plotly_utils\colors_init_.py in unlabel_rgb(colors)
741 str_num = str_num + char
742 else:
--> 743 numbers.append(float(str_num))
744 str_num = ""
745 return (numbers[0], numbers[1], numbers[2])

ValueError: could not convert string to float: ''

Start by reproducing the documented unlabel_rgb example with the sequential.YlOrRd list on the reported Plotly version. Trace unlabel_rgb from the plotly.colors import and compare its behavior for one color versus a list; done means the documented list input works without the reported ValueError and the existing single-color behavior remains intact.