Bug summary

I want to cycle between multiple markerstyles, including those with a numeric value like CARETRIGHT as documented here, but I get an exception if I add one of those.

Code for reproduction

#!/usr/bin/env python3

from cycler import cycler
import matplotlib.pyplot as plt
import matplotlib.markers as mk

cycle = cycler(marker=["+",mk.CARETRIGHT])

t=[0,1]
y=[5,6]

plt.rc('axes', prop_cycle=cycle)
plt.plot(t,y)
plt.show()

Actual outcome

Traceback (most recent call last):
  File "/home/mcd/bugs/bug-cycler.py", line 11, in <module>
    plt.rc('axes', prop_cycle=cycle)
  File "/usr/lib/python3.11/site-packages/matplotlib/pyplot.py", line 670, in rc
    matplotlib.rc(group, **kwargs)
  File "/usr/lib/python3.11/site-packages/matplotlib/__init__.py", line 1062, in rc
    rcParams[key] = v
    ~~~~~~~~^^^^^
  File "/usr/lib/python3.11/site-packages/matplotlib/__init__.py", line 734, in __setitem__
    raise ValueError(f"Key {key}: {ve}") from None
ValueError: Key axes.prop_cycle: Could not convert 5 to str

Expected outcome

A plot using CARETLEFT as marker.

Additional information

This seems like it has to do with the fact, that some markers are referred to by number and not by a string like "+".
I don't know whether the problem is in matplotlib, cycler or the combination of both.

Operating system

Artix Linux

Matplotlib Version

3.8.1

Matplotlib Backend

GTK4Agg

Python version

Python 3.11.6

Jupyter version

No response

Installation

Linux package manager