Colormaps Docs Error

[pratiman-91]

Description

The latest docs have error in Colormaps section https://proplot.readthedocs.io/en/latest/colormaps.html#

Steps to reproduce

A "Minimal, Complete and Verifiable Example" will make it much easier for maintainers to help you.

import proplot as pplt
fig, axs = pplt.show_cmaps(rasterize=True)

Expected behavior: [What you expected to happen]
List of included colormaps

Actual behavior: [What actually happened]
TypeError: '>=' not supported between instances of 'list' and 'float'

[lukelbd]

Yikes 😬 -- thanks for the heads up. Looking into this.

[lukelbd]

It seems proplot was triggering an internal matplotlib error with _ColorbarAutoMinorLocator. When minor ticks are "active" and the major locator has no ticks (e.g. because it is a NullLocator or empty FixedLocator) then AutoMinorLocator returns an empty list [], while _ColorbarAutoMinorLocator always expects numpy arrays.

This is fixed in the latest proplot version (55e2efa). I came across this matplotlib bug before, but it looks like the colorbar ticking internals have been refactored in matplotlib's master branch, which will fix the bug for their upcoming v3.5 release -- so we don't need to submit a PR.