BUG: fix a regression where tick direction wasn't conserved by Axis.clear()

neutrinoceros · neutrinoceros · commit 92cab09a9bb1 · 2022-09-06T11:25:27.000+02:00
diff --git a/lib/matplotlib/axis.py b/lib/matplotlib/axis.py
@@ -855,7 +855,8 @@ def _reset_major_tick_kw(self, keep_tick_and_label_visibility=False):
         *keep_tick_and_label_visibility*.
         """
         backup = {name: value for name, value in self._major_tick_kw.items()
-                  if name in ['tick1On', 'tick2On', 'label1On', 'label2On']}
+                  if name in ['tick1On', 'tick2On', 'tickdir',
+                              'label1On', 'label2On']}
         self._major_tick_kw.clear()
         if keep_tick_and_label_visibility:
             self._major_tick_kw.update(backup)
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
@@ -7665,6 +7665,17 @@ def test_2dcolor_plot(fig_test, fig_ref):
     axs[4].bar(np.arange(10), np.arange(10), color=color.reshape((1, -1)))
 
 
+@check_figures_equal(extensions=['png'])
+def test_tickdir_axes_clear(fig_test, fig_ref):
+    # see https://github.com/matplotlib/matplotlib/issues/23806
+    ax = fig_ref.subplots(1, 1)
+    ax.tick_params(which='both', axis='both', direction='in')
+
+    ax = fig_test.subplots(1, 1)
+    ax.tick_params(which='both', axis='both', direction='in')
+    ax.clear()
+
+
 @check_figures_equal(extensions=['png'])
 def test_shared_axes_clear(fig_test, fig_ref):
     x = np.arange(0.0, 2*np.pi, 0.01)
