Toggling the visibility of the axis tick labels via set_visible(False) can lead to their outright destruction, seehere. According to@ImportanceOfBeingErnest, this issue is related to#10088.

I include a minimal code fragment that demonstrates the problem.

Code for reproduction

frommatplotlibimportpyplotaspltplt.plot([0,1], [8,6])ax=plt.gca()yticks=ax.get_yticklabels()print(yticks)fortickinyticks:tick.set_visible(False)print(ax.get_yticklabels())

Actual outcome

<a list of 11 Text yticklabel objects><a list of 0 Text yticklabel objects>

Expected outcome

The snippet shows that the y tick labels are destructed after setting their visibility to False. One can restore them by issuing:

ax.yaxis.set_tick_params(labelleft=True)

This issue first occurred on matplotlib 3.1.2 but not on the previous version (which I believe was 3.0.x).

Matplotlib version

• Operating system: Win10 Pro 64bit
• Matplotlib version: 3.1.2
• Matplotlib backend (print(matplotlib.get_backend())): Qt5Agg
• Python version: 3.6.3

Python was installed via WinPython; Matplotlib was manually upgraded to v3.1.2.