matplotlib gives error if colormap already registered, problem in colorize

[sgiardie]

• pixell version: 0.17.1
• Python version: 3.8.15
• Operating System: Linux

Description

colorize.mpl_setdefault breaks if a colormap is already registered in matplotlib. For example, I was using
colorize.mpl_setdefault('planck'), causing the error
ValueError: A colormap named "planck" is already registered.

What I Did

I modified the colorize.mpl_register function with a try/except block:

for name in names:
    cmap = to_mpl_colormap(name, schemes[name])
    try:
        matplotlib.cm.register_cmap(name, cmap)
    except:
        pass