Merge pull request #10690 from anntzer/lazyticks

jklymak · web-flow · commit 97f360a040e6 · 2018-03-07T10:21:48.000-08:00
Improve lazy-ticks realization.
diff --git a/lib/matplotlib/axis.py b/lib/matplotlib/axis.py
@@ -677,11 +677,20 @@ def __get__(self, instance, cls):
         if instance is None:
             return self
         else:
+            # instance._get_tick() can itself try to access the majorTicks
+            # attribute (e.g. in certain projection classes which override
+            # e.g. get_xaxis_text1_transform).  In order to avoid infinite
+            # recursion, first set the majorTicks on the instance to an empty
+            # list, then create the tick and append it.
             if self._major:
-                instance.majorTicks = [instance._get_tick(major=True)]
+                instance.majorTicks = []
+                tick = instance._get_tick(major=True)
+                instance.majorTicks.append(tick)
                 return instance.majorTicks
             else:
-                instance.minorTicks = [instance._get_tick(major=False)]
+                instance.minorTicks = []
+                tick = instance._get_tick(major=False)
+                instance.minorTicks.append(tick)
                 return instance.minorTicks
 
 
