xticks() and yticks() now raise TypeError instead of AttributeError when parameter ticks is missing

rscmendes · rscmendes · commit 274fbdc0b17a · 2019-12-14T00:34:32.000Z
diff --git a/lib/matplotlib/pyplot.py b/lib/matplotlib/pyplot.py
@@ -1397,7 +1397,8 @@ def xticks(ticks=None, labels=None, **kwargs):
     if ticks is None:
         locs = ax.get_xticks()
         if labels is not None:
-            raise AttributeError("Labels can't be set without setting ticks")
+            raise TypeError("xticks(): Parameter 'labels' can't be set without "
+                            "setting 'ticks'")
     else:
         locs = ax.set_xticks(ticks)
 
@@ -1456,7 +1457,8 @@ def yticks(ticks=None, labels=None, **kwargs):
     if ticks is None:
         locs = ax.get_yticks()
         if labels is not None:
-            raise AttributeError("Labels can't be set without setting ticks")
+            raise TypeError("yticks(): Parameter 'labels' can't be set without "
+                            "setting 'ticks'")
     else:
         locs = ax.set_yticks(ticks)
 
