Python3 handling of None > None.

pelson · pelson · commit 85678774bb98 · 2013-09-27T11:43:31.000+01:00
diff --git a/lib/matplotlib/colors.py b/lib/matplotlib/colors.py
@@ -879,10 +879,10 @@ def __call__(self, value, clip=None):
 
         self.autoscale_None(result)
         vmin, vmax = self.vmin, self.vmax
-        if vmin > vmax:
-            raise ValueError("minvalue must be less than or equal to maxvalue")
-        elif vmin == vmax:
+        if vmin == vmax:
             result.fill(0)   # Or should it be all masked?  Or 0.5?
+        elif vmin > vmax:
+            raise ValueError("minvalue must be less than or equal to maxvalue")
         else:
             vmin = float(vmin)
             vmax = float(vmax)
