Legend handles and lables are not available via ax.get_legend_handles_labels()

[Zerosimi]

Hi everyone,

I'm plotting multiple windrose axes and I want to have a common legend for them. While working on that, I found that the legend handles and labels are unavailable via the ax.get_legend_handles_labels() routine. Would be nice if that functionality could be there. Below you find a minimal working example that shows the issue: The legend will be empty using ax.get_legend_handles_labels(), even though with the ax.set_legend() method, a legend with handles and labels appears.

Minimal working example

# Dummy data
ws = np.linspace(0, 10, 20)
wd = np.linspace(0, 360, 20)

# Plotting
fig = plt.figure()
ax = windrose.WindroseAxes.from_ax(fig=fig)

# Windrose plot
ax.bar(
    wd,
    ws,
    bins=np.linspace(0, 9, 4),
)

# Legend
# ax.set_legend() # This would work as expected
h, l = ax.get_legend_handles_labels()  # Returns ([ ],[ ])
fig.legend(ncols=len(h), loc="lower center", labels=l, handles=h)

plt.show()
plt.close()