`cmocean.tools.print_colormaps` snippet in the docs raises an error

Hello! I love your work, this is my favorite set of colormaps.

Today I wanted to run some code from the docs:

import cmocean

cmaps = cmocean.cm.cmap_d
cmocean.tools.print_colormaps(cmaps)

and it produces the following exception and traceback:

Traceback (most recent call last):
  File "/home/mfisher/Projects/_test/extend-colormaps-js/test.py", line 4, in <module>
    cmocean.tools.print_colormaps(cmaps)
  File "/home/mfisher/Projects/_test/extend-colormaps-js/.pixi/envs/default/lib/python3.12/site-packages/cmocean/tools.py", line 25, in print_colormaps
    rgbtemp = cmap(np.linspace(0, 1, N))[np.newaxis, :, :3][0]
              ^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: 'str' object is not callable

The issue appears to be here:

https://github.com/matplotlib/cmocean/blob/59c35002c3aa5296b65d9646e52604c627441eb6/cmocean/tools.py#L23

We loop over the cmaps object, which is a dictionary of colormap name keys to colormap object values in this invocation, but the function expects the object to be a list of colormap objects.

So the docs could be updated to:

import cmocean

cmaps = cmocean.cm.cmap_d
cmocean.tools.print_colormaps(cmaps.values())

But after running this code I don't see the output files!

Issue にリンクされている capabilities の例と、23 行目付近の cmocean/tools.py から始めます。ドキュメント化されたスニペットを実行し、print_colormaps が入力をどのように処理し、出力を書き込むかを確認します。報告されたエラーが発生しないようにドキュメントの例を更新し、その出力ファイルがどこに現れるはずかを明確にするか、確認します。